Find flights
Deals
Insights
When to book
FAQs & Tips
Direct Flights
Airlines

STL - SEA

$50 Find cheap flights from St. Louis to Seattle

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from St. Louis to Seattle departing on 9/10. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
0 bags
Sat 6/29
Sat 7/6

Search hundreds of travel sites at once for deals on flights to Seattle

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to Seattle.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to Seattle.
In the last 7 days travelers have searched 42,686,544 times on KAYAK, and here is why:

Save 21% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Bundle and saveSave money when you bundle your flight + hotel.

Cheap flight deals from St. Louis to Seattle (STL-SEA)

 
These are the cheapest deals for flights from St. Louis to Seattle currently on KAYAK along with options from the most popular airlines KAYAK users selected for this route. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Recent round-trip flight deals from St. Louis to Seattle

Recommended round-trip deals departing in the coming months from the most popular airlines that fly from St. Louis to Seattle.

Recent one-way flight deals from St. Louis to Seattle

Only flying one-way? Below are some of the best one-way flight deals from St. Louis to Seattle found on KAYAK recently.

Recent last minute flight deals from St. Louis to Seattle

Leaving soon but still want a bargain? Check out these latest deals for last minute flights from St. Louis to Seattle.

Recent direct flight deals from St. Louis to Seattle

The latest deals for direct flights from St. Louis to Seattle so you can sit back and relax without the need for a layover.

Cheap bus & train deals from St. Louis to Seattle

Find recent round-trip train or bus tickets from St. Louis to Seattle.

All round-trip flight deals to Seattle

The cheapest plane tickets to Seattle found on KAYAK recently.
Discover the best prices and deals for you by selecting your travel dates.
Choose your dates
8:00 am - 8:45 amSTL-SEA
26h 45m1 stop
9:12 pm - 10:46 amSEA-STL
11h 34m1 stop
$127Spirit Airlines
Find Deal
Tue, Aug 20 - Tue, Aug 27
11:36 am - 8:21 pmSTL-SEA
10h 45m1 stop
9:12 pm - 10:46 amSEA-STL
11h 34m1 stop
$132Spirit Airlines
Find Deal
Wed, Aug 21 - Tue, Aug 27
7:29 pm - 10:48 amSTL-SEA
17h 19m1 stop
9:12 pm - 10:46 amSEA-STL
11h 34m1 stop
Tue, Aug 20 - Tue, Aug 27
11:36 am - 8:21 pmSTL-SEA
10h 45m1 stop
7:51 pm - 10:18 amSEA-STL
12h 27m1 stop
Wed, Aug 28 - Sat, Aug 31
7:29 pm - 10:48 amSTL-SEA
17h 19m1 stop
7:51 pm - 10:18 amSEA-STL
12h 27m1 stop
$179Frontier
Find Deal
Thu, Aug 29 - Thu, Sep 5
8:00 pm - 9:11 pmSTL-SEA
27h 11m1 stop
7:51 pm - 10:18 amSEA-STL
12h 27m1 stop
$181Frontier
Find Deal
Fri, Sep 13 - Sun, Sep 15
7:00 am - 9:26 amSTL-SEA
4h 26mnonstop
7:37 am - 1:33 pmSEA-STL
3h 56mnonstop
$277Alaska Airlines
Find Deal
Tue, Aug 20 - Tue, Aug 27
7:31 pm - 9:55 pmSTL-SEA
4h 24mnonstop
7:37 am - 1:33 pmSEA-STL
3h 56mnonstop
$297Alaska Airlines
Find Deal
Fri, Aug 23 - Sun, Sep 1
6:30 pm - 11:59 pmSTL-SEA
7h 29m1 stop
12:35 am - 10:33 amSEA-STL
7h 58m1 stop
$317Delta
Find Deal
Tue, Aug 20 - Mon, Aug 26
3:30 pm - 8:06 pmSTL-SEA
6h 36m1 stop
12:30 am - 10:20 amSEA-STL
7h 50m1 stop
$322Delta
Find Deal
Fri, Sep 20 - Sat, Sep 28
8:00 am - 8:21 pmSTL-SEA
14h 21m1 stop
$50Spirit Airlines
Find Deal
Tue, Sep 10
10:34 am - 12:45 pmSTL-SEA
28h 11m2 stops
$64Spirit Airlines
Find Deal
Tue, Sep 10
2:41 pm - 8:59 amSTL-SEA
20h 18m1 stop
$87Spirit Airlines
Find Deal
Mon, Jun 17
8:02 pm - 9:10 amSTL-SEA
15h 08m1 stop
$96Frontier
Find Deal
Sat, Jun 8
7:29 pm - 8:56 pmSTL-SEA
27h 27m1 stop
$100Frontier
Find Deal
Thu, Jun 6
3:07 pm - 10:56 pmSTL-SEA
9h 49m1 stop
$112American Airlines
Find Deal
Mon, Sep 30
6:25 pm - 11:59 pmSTL-SEA
7h 34m1 stop
$113Delta
Find Deal
Tue, Jun 25
2:34 pm - 4:59 pmSTL-SEA
4h 25mnonstop
$119Alaska Airlines
Find Deal
Sat, Sep 21
7:31 pm - 9:55 pmSTL-SEA
4h 24mnonstop
$139Alaska Airlines
Find Deal
Fri, Aug 23
3:27 pm - 10:57 pmSTL-SEA
9h 30m1 stop
$214American Airlines
Find Deal
Wed, Jun 5
10:21 pm - 9:55 amSTL-SEA
13h 34m1 stop
10:58 pm - 10:42 amSEA-STL
9h 44m1 stop
$259Frontier
Find Deal
Mon, Jun 3 - Sun, Jun 9
10:44 pm - 7:01 amSTL-SEA
10h 17m1 stop
10:58 pm - 10:42 amSEA-STL
9h 44m1 stop
$261Frontier
Find Deal
Tue, Jun 4 - Sun, Jun 9
2:28 pm - 6:26 pmSTL-SEA
5h 58m1 stop
6:00 am - 2:15 pmSEA-STL
6h 15m1 stop
$276Delta
Find Deal
Fri, May 31 - Sat, Jun 1
5:04 am - 11:08 amSTL-SEA
8h 04m1 stop
12:20 am - 8:54 amSEA-STL
6h 34m1 stop
$352American Airlines
Find Deal
Tue, Jun 4 - Sat, Jun 8
4:20 pm - 10:41 pmSTL-SEA
8h 21m1 stop
12:28 pm - 11:17 pmSEA-STL
8h 49m1 stop
$356American Airlines
Find Deal
Fri, May 31 - Sat, Jun 1
2:28 pm - 6:26 pmSTL-SEA
5h 58m1 stop
12:40 am - 11:10 amSEA-STL
8h 30m1 stop
$357Delta
Find Deal
Fri, May 31 - Fri, May 31
5:31 pm - 10:23 pmSTL-SEA
6h 52m1 stop
6:30 am - 8:49 pmSEA-STL
12h 19m2 stops
$392United Airlines
Find Deal
Mon, Jun 3 - Wed, Jun 5
4:45 pm - 10:50 pmSTL-SEA
8h 05m1 stop
11:05 am - 10:15 pmSEA-STL
9h 10m2 stops
$406United Airlines
Find Deal
Tue, Jun 4 - Fri, Jun 7
2:36 pm - 4:49 pmSTL-SEA
4h 13mnonstop
5:58 pm - 11:59 pmSEA-STL
4h 01mnonstop
$667Alaska Airlines
Find Deal
Tue, Jun 4 - Sun, Jun 9
2:36 pm - 4:49 pmSTL-SEA
4h 13mnonstop
5:58 pm - 11:59 pmSEA-STL
4h 01mnonstop
$827Alaska Airlines
Find Deal
Fri, May 31 - Tue, Jun 4
7:00 am - 9:26 amSTL-SEA
4h 26mnonstop
7:37 am - 1:33 pmSEA-STL
3h 56mnonstop
$277Alaska Airlines
Find Deal
Tue, Aug 20 - Tue, Aug 27
7:31 pm - 9:55 pmSTL-SEA
4h 24mnonstop
6:08 pm - 11:59 pmSEA-STL
3h 51mnonstop
$297Alaska Airlines
Find Deal
Fri, Aug 23 - Mon, Aug 26
2:34 pm - 4:59 pmSTL-SEA
4h 25mnonstop
7:37 am - 1:33 pmSEA-STL
3h 56mnonstop
$307Alaska Airlines
Find Deal
Tue, Aug 20 - Tue, Aug 27
7:31 pm - 9:55 pmSTL-SEA
4h 24mnonstop
7:37 am - 1:33 pmSEA-STL
3h 56mnonstop
$327Alaska Airlines
Find Deal
Thu, Aug 22 - Mon, Sep 2
7:32 pm - 10:00 pmSTL-SEA
4h 28mnonstop
7:30 am - 1:20 pmSEA-STL
3h 50mnonstop
$347Alaska Airlines
Find Deal
Thu, Jun 20 - Wed, Jun 26
7:32 pm - 10:00 pmSTL-SEA
4h 28mnonstop
7:37 am - 1:33 pmSEA-STL
3h 56mnonstop
$362Alaska Airlines
Find Deal
Thu, Aug 15 - Fri, Aug 23
7:32 pm - 10:00 pmSTL-SEA
4h 28mnonstop
6:10 pm - 11:59 pmSEA-STL
3h 49mnonstop
$367Alaska Airlines
Find Deal
Fri, Jun 21 - Tue, Jun 25
7:32 pm - 10:00 pmSTL-SEA
4h 28mnonstop
7:30 am - 1:20 pmSEA-STL
3h 50mnonstop
$387Alaska Airlines
Find Deal
Thu, Jun 20 - Sat, Jun 22
7:32 pm - 10:00 pmSTL-SEA
4h 28mnonstop
7:30 am - 1:20 pmSEA-STL
3h 50mnonstop
$497American Airlines
Find Deal
Fri, Jun 14 - Sun, Jun 16
7:32 pm - 10:00 pmSTL-SEA
4h 28mnonstop
6:10 pm - 11:59 pmSEA-STL
3h 49mnonstop
$522American Airlines
Find Deal
Sat, Jun 29 - Tue, Jul 9

Flights from St. Louis to Seattle - Travel Insights & Trends

Get data-powered insights and trends into flights from St. Louis to Seattle to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from St. Louis to Seattle?

The average price of all flights from St. Louis to Seattle clicked on KAYAK for each day over the last 12 months.
When flying from St. Louis to Seattle, you should consider leaving on a Thursday and avoid Saturdays if you are looking for the best rates. For your return to St. Louis, you’ll find the best rates on Tuesdays and the most expensive ones on Fridays.

What is the cheapest month to fly from St. Louis to Seattle?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from St. Louis to Seattle, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.
The cheapest month for flights from St. Louis to Seattle is February, where tickets cost $246 on average. On the other hand, the most expensive months are July and June, where the average cost of tickets is $511 and $461 respectively.

How far in advance should I book a flight from St. Louis to Seattle?

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for flights from St. Louis to Seattle, removes the top 0.1% to account for outliers, and then takes the average of all the values for each month.
To get a below average price on the flight from St. Louis to Seattle, you should book around 5 days before departure. For the absolute cheapest price, our data suggests you should book 81 days before departure.

Which airlines provide the cheapest flights from St. Louis to Seattle?

The cheapest price for the route for each airline clicked by KAYAK users in the last 72 hours.
The best deals for a one-way ticket found by KAYAK users over the last 3 days were on Spirit Airlines ($50) and Frontier ($96). The cheapest round-trip tickets were found on Spirit Airlines ($127) and Frontier ($179).

Which airlines fly non-stop between St. Louis and Seattle?

Airline and price data is aggregated from results in KAYAK’s search results from the last 2 weeks for flights from St. Louis to Seattle.
There are 2 airlines that fly nonstop from St. Louis to Seattle. They are Alaska Airlines and Southwest. The cheapest airline for this route is Alaska Airlines, with the best one-way deal found costing $170. On average, the best prices for this route can be found at Alaska Airlines.

How many flights are there between St. Louis and Seattle per day?

Each day, there are between 6 and 7 nonstop flights that take off from St. Louis and land in Seattle, with an average flight time of 4h 20m. The most common departure time is 2:00 pm and most flights take off in the morning. Each week, there are 47 flights. The most frequent day of departure is Tuesday, when 15% of all weekly flights depart. The fewest flights depart on a Thursday.

Which cabin class options are there for flights between St. Louis and Seattle?

The average price of flights for each cabin class for the route found by users searching on KAYAK over the last 2 weeks.
There are 4 cabin class options for the route. These are First, Business, Economy and Prem Economy. Perform a search on KAYAK to find the latest prices and availability for all cabin fares, which differ across airlines.

How long does a flight from St. Louis to Seattle take?

The average nonstop flight takes 4h 13m, covering a distance of 1,704 miles.

What’s the earliest departure time from St. Louis to Seattle?

Early birds can take the earliest flight from St. Louis at 7:00 am and will be landing in Seattle at 9:14 am.

What’s the latest departure time from St. Louis to Seattle?

If you prefer to fly at night, the latest flight from St. Louis to Seattle jets off at 7:41 pm and lands at 10:00 pm.

Good to know

Low season

January

High season

June

Cheapest flight

$50
Best time to beat the crowds with an average 29% drop in price.
Most popular time to fly with an average 33% increase in price.
Flight from St. Louis to Seattle

When to book flights from St. Louis to Seattle

Are your dates flexible? Find out the best times to travel from St. Louis to Seattle based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from St. Louis to Seattle

  • How far is downtown Seattle from Seattle Tacoma International Airport?

    Downtown Seattle is about 15 miles away from the airport. There are multiple ways to get there, although they all vary in cost, speed, and convenience. For instance, the fastest way to downtown Seattle would be by taking a taxi. They can easily be found on the third floor of the parking garage and take less than 25min. Alternatively, you can opt for public transport, which is significantly cheaper but slower than a taxi. To board your train, just head to the bridge on the fourth floor of the parking garage where the terminal is located.

  • Does Seattle Tacoma Airport offer wheelchair services?

    Seattle Airport offers complimentary wheelchair services to aid travelers in getting from the plane to baggage claim to the ground transportation center with ease. However, due to logistics reasons, the airport mainly works with the airlines to provide these services. Therefore, the best way to get wheelchair assistance would be by booking with your airline, which will then put on a note on your reservation record informing the airport that you require special assistance.

  • Is on-site parking available at St. Louis Lambert International Airport?

    St. Louis Lambert Airport has plenty of on-site parking options. Two are specially dedicated for long-term parking. They include Long-Term Parking Lot B and Long-Term Parking Lot C, which is split into a covered and uncovered section. Long-Term Parking Lot B is located past Daily Parking Lot A east of the terminal, while Parking Lot C is situated southwest of the airport.

  • Which airline has a lounge in St Louis Lambert Airport?

    St. Louis Lambert Airport has about four lounges for guests to hang out and relax while waiting for their boarding call. The American Airlines Admirals Club is located Airside on Terminal 1 near Gate C1. The Wingtips Lounge, which is open to all travelers regardless of the airline, is located in Terminal 2 near Gate E22. Here you can find a range of snacks and beverages as well as a TV, charging stations, and Wi-Fi in case you need to send a few emails before boarding your flight.

  • What is the cheapest flight from St. Louis to Seattle?

    In the last 3 days, the lowest price for a flight from St. Louis to Seattle was $50 for a one-way ticket and $127 for a round-trip.

  • Do I need a passport to fly between St. Louis and Seattle?

    No

  • Which airlines offer Wi-Fi service onboard planes from St. Louis to Seattle?

    Alaska Airlines, and American Airlines offer inflight Wi-Fi service on the St. Louis to Seattle flight route.

  • Which aircraft models fly most regularly from St. Louis to Seattle?

    The Boeing 737 is the aircraft model that flies most regularly on the St. Louis to Seattle flight route.

  • Which airline alliances offer flights from St. Louis to Seattle?

    oneworld is the only airline alliance operating flights between St. Louis and Seattle.

  • On which days can I fly direct from St. Louis to Seattle?

    There are nonstop flights from St. Louis to Seattle on a daily basis.

  • Which is the best airline for flights from St. Louis to Seattle, Alaska Airlines or Delta?

    The two airlines most popular with KAYAK users for flights from St. Louis to Seattle are Alaska Airlines and Delta. With an average price for the route of $398 and an overall rating of 8.0, Alaska Airlines is the most popular choice. Delta is also a great choice for the route, with an average price of $286 and an overall rating of 8.0.

  • How does KAYAK find such low prices on flights from St. Louis to Seattle?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from St. Louis to Seattle.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from St. Louis to Seattle?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Seattle from St. Louis is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from St. Louis to Seattle?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Seattle with an airline and back to St. Louis with another airline. Booking your flights between St. Louis and SEA can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from St. Louis to Seattle?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Seattle from St. Louis up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

KAYAK’s top tips for finding a cheap flight from St. Louis to Seattle

  • Looking for a cheap flight? 25% of our users found flights on this route for $199 or less one-way and $398 or less round-trip.
  • If you’re looking for a way to cut down on the cost of tickets, consider booking connecting flights instead of a direct one. More often than not, airlines will charge lower prices for connecting flights on the same route.
  • While booking your flight, pay close attention to the in-flight services provided. This is because different flights will have varying services available even when they are facilitated by the same airline.
  • If you’re traveling with the kids, you’ll be happy to learn that Seattle Tacoma International Airport (SEA) has a child play area where the kids can play around as you clear with baggage claim. It is located on Concourse D next to Qdoba.
  • St Louis Lambert International Airport (STL) is a pet-friendly airport. If you’re traveling with a service animal or pet, there are multiple relief areas for the four-legged friends. You’ll find two on Concourse E close to Gate E4 while the other one is found on Concourse C near Gate C24.
  • If you need a private space to nurse your child at Seattle Airport, you should check out the nursing pods on Concourse A, near Gate A10E.
See more tips

Prefer to fly non-stop from St. Louis to Seattle?

Find which airlines fly direct from Lambert-St Louis to Seattle/Tacoma Intl, which days they fly and book direct flights.

Nonstop departures

Lambert-St Louis to Seattle/Tacoma Intl

Monday

Air Tahiti Nui, Alaska Airlines, American Airlines, +3 more

Air Tahiti Nui, Alaska Airlines, +4 more

Tuesday

Air Tahiti Nui, Alaska Airlines, American Airlines, +4 more

Air Tahiti Nui, Alaska Airlines, +5 more

Wednesday

Air Tahiti Nui, Alaska Airlines, American Airlines, +3 more

Air Tahiti Nui, Alaska Airlines, +4 more

Thursday

Air Tahiti Nui, Alaska Airlines, American Airlines, +4 more

Air Tahiti Nui, Alaska Airlines, +5 more

Friday

Air Tahiti Nui, Alaska Airlines, American Airlines, +3 more

Air Tahiti Nui, Alaska Airlines, +4 more

Saturday

Air Tahiti Nui, Alaska Airlines, American Airlines, +4 more

Air Tahiti Nui, Alaska Airlines, +5 more

Sunday

Air Tahiti Nui, Alaska Airlines, American Airlines, +3 more

Air Tahiti Nui, Alaska Airlines, +4 more

See more direct flights

Nonstop returns

Seattle/Tacoma Intl to Lambert-St Louis

Monday

Air Tahiti Nui, Alaska Airlines, American Airlines, +3 more

Air Tahiti Nui, Alaska Airlines, +4 more

Tuesday

Air Tahiti Nui, Alaska Airlines, American Airlines, +5 more

Air Tahiti Nui, Alaska Airlines, +6 more

Wednesday

Air Tahiti Nui, Alaska Airlines, American Airlines, +3 more

Air Tahiti Nui, Alaska Airlines, +4 more

Thursday

Air Tahiti Nui, Alaska Airlines, American Airlines, +5 more

Air Tahiti Nui, Alaska Airlines, +6 more

Friday

Air Tahiti Nui, Alaska Airlines, American Airlines, +3 more

Air Tahiti Nui, Alaska Airlines, +4 more

Saturday

Air Tahiti Nui, Alaska Airlines, American Airlines, +5 more

Air Tahiti Nui, Alaska Airlines, +6 more

Sunday

Air Tahiti Nui, Alaska Airlines, American Airlines, +4 more

Air Tahiti Nui, Alaska Airlines, +5 more

See more direct flights
See more direct flights

Top 5 airlines serving from St. Louis to Seattle

 
See real verified KAYAK customer reviews for airlines flying from St. Louis to Seattle. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from St. Louis to Seattle? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
Alaska AirlinesOverall score based on 9192 reviews
7.9Comfort
8.2Boarding
8.6Crew
7.3Entertainment
7.3Food
Airline reviews

I didn’t know that food needed to be ordered ahead. Please include this in the reservation information. Overall, very good experience.

8.0 ExcellentNorma, May 2024SNA - SEA
Read more about Alaska Airlines reviews

I didn’t know that food needed to be ordered ahead. Please include this in the reservation information. Overall, very good experience.

Full flight where I had another passenger sitting in middle seat who said that he had lost 250 lbs from 500. The stewardess on exiting the flight advise me that I was going to receive a refund. I thought she was talking about another passenger. The stewardess saw that to make him comfortable I had lifted the armrest and flew for 5 hours to Seattle from Reagan DCA with a portion of his body on my seat. I survived. I flight to remember!!!!

the flight was delayed almost 3 hours and not one time was we told that it was delayed or why. I had asked one of the crew members why it was delayed, 20 minutes after the flight was supposed to take off, and was told that they had no idea what was going on and that they had not been told anything. this is FRIGHTENING!!!! No excuse!!

Flights were on time. Check in was fine. Crew members were pleasant.

I would have liked it to have been easier to order food for the flight. My son was not happy with the snack pack I bought him and it was a very long flight for a little boy to go without food.

Ground staff at LAX was very helpful. The Alaska lounge food and service is better than most airport lounges. I think the Staff are well trained polite and actually seem happy to work there. Great service Thanks 🙏 Jjk

The flight was very very delayed and arrived much later than planned. There was no communication about why or when our arrival would be. I would expect better and open communication about the flight but there was none. Also just pretzels? How disappointing.

I got to my destination but no comforts no snacks nothing. Like herding cows!!

My only comment was the confusion at Houston. Suppose to leave at 6 am and didn't leave til 11 am. Then moving from gate 10 to 30 and couple of hours later back to gate 10. Otherwise everyone everything was great.

The food options could be better. Possibly some sandwiches to be added to the menu.

Delta crushed it. Flight attendant in first was attentive and just never stopped. Honestly one of the best domestic flights I’ve been on.

Delta is one of the best airlines I have flown

It was a Red-Eye flight so was not comfortable enough to sleep, but seat was as expected. Crew was great and in-flight entertainment was excellent. Flight was smooth

Standard economy seats on Deltas 767 were better than Alaska premium seats on their 737 MAX9; more legroom, wider seats. Entertainment was great, no ipad or phone required. Could have included a meal service.

Plane was turned around due to fog half way into the flight, Delta did not properly direct passengers to stay on same flight and instead failed to properly rebook on Alaska

The boarding process was terrible especially with an indirect flight Chicago to Seattle to San Diego was terrible talking about we overbooked a flight idk if I’d take this airline ever again we got off our flight from Chicago to Seattle and we traveled for business and they told us our connecting flight was over booked and their was no seats asking people to take a delayed next flight and they don’t tell anyone coughing to wear masks seats 30A-B were terrible during the flight no one wants to sit next to people coughing all around I don’t want to be sick traveling for work or get sick anytime it’s very upsetting the staff doesn’t take this stuff serious to tell them to wear masks when they see people coughing and sneezing

Flight was on time, the crew was personable & professional, & the plane arrived early which was nice.

This flight landed early, but deplaned late. We were stuck sitting and waiting for a gate for over an hour

My flight was very clean and the location was comfortable. The service was great. A satisfying flight!

I appreciated being upgraded. I was very disappointed with my 13 hr layover in Seattle to geg, while my friends who flew Alaska made it home as scheduled. I had to reserve a hotel on my dime.

The flight and boarding were easy peasy. I was traveling with my 4-year-old, so a smooth boarding experience was especially appreciated. My only piece of feedback is really about where our gate was in O'Hare. They've shoved four gates into a tiny corner of the B terminal and there isn't early enough room or seating for everyone. Not United's problem, but did dent the overall experience.

Dinner was okay but the breakfast was not eatable on the flight San Francisco to Zurich.

There was no screens on board AND the WiFi didn’t work. My seat was broken and couldn’t recline so I couldn’t even sleep. The flight attendants didn’t offer anything to make it more comfortable. It was such an old cramped plane, when the person in front of me reclined I couldn’t even open my tray table. All the United ads talk about guaranteeing everyone gets a screen!

The Wi-Fi was unavailable on this flight for some reason.

On time take off…US cabins look tired and need of refresh!

Fantastic. Smooth boarding with an infant. Never experienced it with any other carriers.

This was a Lufthansa flight, not United. The CSA at the counter, Ashley, was not only incompetent, but quite rude. Me and two other PAX waited over 7 minutes standing in front of her and another CSA and they ignored us. We joked that we must have accidently taken invisibility pills. She could have at least said "I'll be with you in a moment, I'm currently....". I could go on about how rude she and the other CSAs were (whispering, not communicating with me, blaming the situation on others, etc.). She would not work for me. Then, she gave me literally the worst seat on the plane. the worst. My seat kept getting bumped (rammed twice by the crew with their carts and about every 5 minutes by someone using the bathroom), listening to the bathroom all night, crowded seat, etc.

My seat was broken. WiFi didn’t work. Gate crew at HOU were rude and condescending. Treated all the passengers badly. Bad experience, United.

First flight of the day… MINIMUM FUEL! 15 minute landing delay at HOU due to fog turned into a 2+ hour delay! Rather than circle, they had to divert to another city to refuel! Sat on tarmac at Austin to refuel. We ALL missed our connections! The crew, including pilots, were clueless. Crew was really a mess. At HOU, Untied employees were exceedingly rude to all. It was pitiful.

An hour and a half late is UNACCEPTABLE. The negative impact to our family is unconscionable. And for the price we were forced to pay...

Experience was bad. 3.5 hour delay for a 2.5 hour trip. There was no r Transparency about the reason for the delay and it was done 30 mins at a time.

The boarding process and flight were great. However, I waited about 40 minutes for my luggage. It did not come up on the designated belt. Instead, everyone’s bags were on a cart. Not sure what the issue was, but we were not informed until another passenger went looking for her bags and found them.

There were delays on both ends. It made it less than excellent. This plane was great though

AA1537 the AC was not working properly. It was very hot and uncomfortable.

Worst experience flying American Airlines. I fly with them often, so I was super disappointed in the service I received at gate 30 in LGA on May 24, mid-day. The flight was delayed twice. I was patiently waiting in the American Airlines lounge when I received the notice on my app that the plane was boarding 45 minutes before its newly re-scheduled take off of 4 pm (from the orginal 1:45 pm then 3:00 pm). It took me 5 min to travel from the lounge to the gate and when I arrived there at 3:20 flight gate attendant told me the flight had closed and that they announced for passengers multiple times. I showed them the notification on my app and they were really rude and unempathetic. The person who rescheduled my flight at customer service wasn't any happier but was at least helpful in getting me on the next flight.

Flight was 1/2 hour delayed leaving Phoenix. Otherwise it was an average flight. Flight crew on this trip was very nice.

Everything was great except for the wifi was junk. Crew was super friendly and helpful

Was lucky to have a employee at the AA checkin counter that had compassion and understood they ordeal that we went through with our original flight being diverted, needing to stay in the aircraft and then flying to the original destination; adding hours to the trip and forcing us to miss our connection and our rebooked connection. She was able to get up on standby on the highest priority on the next flight to the closest airport we need to be at and it all worked out despite being many hours late.

Delayed so that missed connecting flight. Connecting flight was also delayed on the tarmac but they closed the gate before the rescheduled time.

Attendants were rude. Scowling. Seats were miserable and we paid extra.

It was delayed 9 hours for operational reasons, despite the plane arriving to the airport on time.

I am very disappointed with Frontier Airlines. They cancelled our flight because they couldn't find a crew member, and then didn't get us to our connecting flight. We had to cancel our whole vacation. We were promised flight and hotel vouchers, but they never sent them.

9hrs delay and didn’t provided anything until after flight landed $75 voucher for fiuture travel no meals or anything.

It was ridiculously hard to check in for the flight, and Frontier charged us a LOT of money to have a carry on suitcase, and then told everyone we could not carry on bags and had to check them through at the gate, and didn't refund the extra money we paid to have the suitcase as carry on.

I had a terrible experience with Frontier. I arrived before the 60 minute cut off and was told that Frontier has a two hour window for bags. I was then told the next available flight wasn’t until the end of the day (I had booked a 6am flight). I took a look around and saw other people being told that they could not board their flights or that they had to pay additional fees. I opted to rebook on American Airlines. There’s absolutely no straightforward way to contact Frontier, so this ticket was a complete waste of money. Oh - and the kicker is that the lady lied about the two hour cut off.

Frontier won’t help you at the airport without paying $25. Carry on was $75. Then you get on the plain and every beverage or snack is also a charge. Seats are hard and real packed in. I would never fly them again.

Worst experience I have seen. The flight was cancelled without any reason.

My experience with frontier staff at the Denver airport was absolutely horrible. The manager on duty was even worst if was the worst experience I have ever had, I have never been treated so poorly as a customer in my life! The staff was extremely rude, eye rolls and attitude and then refusal to help me at all. I wish I could never fly frontier again that’s how horrible it was!

The Frontier app wasn’t working. So I could not pay for a carry on the week prior to flying. They charged me 99$ at the gate to carry on a duffle bag.

Good for the price. My only complaint is that the pilot should keep the air flowing while passengers are waiting to getting out of airplane.

Book cheap flights from St. Louis to Seattle

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from St. Louis to Seattle found on KAYAK in the last 72 hours.
9/10Tue
1 stopSpirit Airlines
14h 21mSTL-SEA
$50
9/10Tue
2 stopsSpirit Airlines
28h 11mSTL-SEA
$64
6/17Mon
1 stopSpirit Airlines
20h 18mSTL-SEA
$87
6/8Sat
1 stopFrontier
15h 08mSTL-SEA
$96
6/6Thu
1 stopFrontier
27h 27mSTL-SEA
$100
9/30Mon
1 stopAmerican Airlines
9h 49mSTL-SEA
$112
6/25Tue
1 stopDelta
7h 34mSTL-SEA
$113
9/21Sat
nonstopAlaska Airlines
4h 25mSTL-SEA
$119
8/23Fri
nonstopAlaska Airlines
4h 24mSTL-SEA
$139
6/5Wed
1 stopAmerican Airlines
9h 30mSTL-SEA
$214

Search by stops

Search by airline

Search by price

Last minute flights from St. Louis to Seattle

Last minute flight, train and bus deals

 
These last-minute flight deals are the cheapest flights found on KAYAK in the last 72 hours for flights from St. Louis to Seattle that are departing in the next 10 days.
6/3Mon
multi-stopFrontier
13h 34mSTL-SEA
6/9Sun
multi-stopFrontier
9h 44mSEA-STL
$259
6/4Tue
multi-stopFrontier
10h 17mSTL-SEA
6/9Sun
multi-stopFrontier
9h 44mSEA-STL
$261
5/31Fri
multi-stopDelta
5h 58mSTL-SEA
6/1Sat
multi-stopDelta
6h 15mSEA-STL
$276
6/4Tue
multi-stopAmerican Airlines
8h 04mSTL-SEA
6/8Sat
multi-stopAmerican Airlines
6h 34mSEA-STL
$352
5/31Fri
multi-stopAmerican Airlines
8h 21mSTL-SEA
6/1Sat
multi-stopAmerican Airlines
8h 49mSEA-STL
$356
5/31Fri
multi-stopDelta
5h 58mSTL-SEA
5/31Fri
multi-stopDelta
8h 30mSEA-STL
$357
6/3Mon
multi-stopUnited Airlines
6h 52mSTL-SEA
6/5Wed
multi-stopUnited Airlines
12h 19mSEA-STL
$392
6/4Tue
multi-stopUnited Airlines
8h 05mSTL-SEA
6/7Fri
multi-stopUnited Airlines
9h 10mSEA-STL
$406
6/4Tue
nonstopAlaska Airlines
4h 13mSTL-SEA
6/9Sun
nonstopAlaska Airlines
4h 01mSEA-STL
$667
5/31Fri
nonstopAlaska Airlines
4h 13mSTL-SEA
6/4Tue
nonstopAlaska Airlines
4h 01mSEA-STL
$827

Search by stops

Search by airline

Search by price

St. Louis - Seattle Flights

Departure:

St. Louis (STL)United States

Destination:

Seattle (SEA)United States

Return flight deals:

Seattle - St. Louis

Cabin classes:

$936
$2,272
$1,146
$276