Cheap Flights from Seattle (SEA) to St. Louis (STL)

Airlines that fly from Seattle-Tacoma International Airport (SEA) to Lambert-St. Louis International Airport (STL)

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Cheap Flights from Seattle (SEA) to St. Louis (STL)

Prices were available within the past 7 days for one-way flights and round trip tickets for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Fri., 10 Jan. - Tue., 14 Jan.
SEA
Seattle
STL
St. Louis
AU$324 Return, found 3 days ago
AU$324
Return
found 3 days ago
Select Delta flight, departing Fri., 10 Jan. from Seattle to St. Louis, returning Tue., 14 Jan., priced at AU$324 found 3 days ago
American Airlines
Mon., 3 Feb. - Mon., 10 Feb.
SEA
Seattle
STL
St. Louis
AU$345 Return, found 1 day ago
AU$345
Return
found 1 day ago
Select American Airlines flight, departing Mon., 3 Feb. from Seattle to St. Louis, returning Mon., 10 Feb., priced at AU$345 found 1 day ago
Alaska Airlines
Mon., 3 Feb. - Mon., 10 Feb.
SEA
Seattle
STL
St. Louis
AU$377 Return, found 1 day ago
AU$377
Return
found 1 day ago
Select Alaska Airlines flight, departing Mon., 3 Feb. from Seattle to St. Louis, returning Mon., 10 Feb., priced at AU$377 found 1 day ago
American Airlines
Tue., 7 Jan. - Tue., 14 Jan.
SEA
Seattle
STL
St. Louis
AU$388 Return, found 3 days ago
AU$388
Return
found 3 days ago
Select American Airlines flight, departing Tue., 7 Jan. from Seattle to St. Louis, returning Tue., 14 Jan., priced at AU$388 found 3 days ago
Delta
Fri., 10 Jan. - Tue., 14 Jan.
SEA
Seattle
STL
St. Louis
AU$389 Return, found 3 days ago
AU$389
Return
found 3 days ago
Select Delta flight, departing Fri., 10 Jan. from Seattle to St. Louis, returning Tue., 14 Jan., priced at AU$389 found 3 days ago
American Airlines
Mon., 3 Feb. - Mon., 10 Feb.
SEA
Seattle
STL
St. Louis
AU$392 Return, found 1 day ago
AU$392
Return
found 1 day ago
Select American Airlines flight, departing Mon., 3 Feb. from Seattle to St. Louis, returning Mon., 10 Feb., priced at AU$392 found 1 day ago
United
Fri., 10 Jan. - Tue., 14 Jan.
SEA
Seattle
STL
St. Louis
AU$396 Return, found 3 days ago
AU$396
Return
found 3 days ago
Select United flight, departing Fri., 10 Jan. from Seattle to St. Louis, returning Tue., 14 Jan., priced at AU$396 found 3 days ago
Delta
Fri., 10 Jan. - Tue., 14 Jan.
SEA
Seattle
STL
St. Louis
AU$404 Return, found 3 days ago
AU$404
Return
found 3 days ago
Select Delta flight, departing Fri., 10 Jan. from Seattle to St. Louis, returning Tue., 14 Jan., priced at AU$404 found 3 days ago
Alaska Airlines
Mon., 3 Feb. - Mon., 10 Feb.
SEA
Seattle
STL
St. Louis
AU$408 Return, found 1 day ago
AU$408
Return
found 1 day ago
Select Alaska Airlines flight, departing Mon., 3 Feb. from Seattle to St. Louis, returning Mon., 10 Feb., priced at AU$408 found 1 day ago
American Airlines
Tue., 7 Jan. - Tue., 14 Jan.
SEA
Seattle
STL
St. Louis
AU$411 Return, found 3 days ago
AU$411
Return
found 3 days ago
Select American Airlines flight, departing Tue., 7 Jan. from Seattle to St. Louis, returning Tue., 14 Jan., priced at AU$411 found 3 days ago
Flight from Seattle to St. Louis route information
Origin airport
Seattle - Tacoma Intl.
Destination airport
Lambert-St. Louis Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, United
Return price
AU$324
Distance
2728 km

Your quick guide to flights from Seattle to St. Louis

Pick up great flights from Seattle to St. Louis

With Expedia, you have your pick of flights a day with 20 airlines covering flights from Seattle to St. Louis. Whether you’re on a business trip, a family holiday or a luxury break, just enter your travel dates, hit search then check out your choice of flights. Select from return, one way or multi-city flights, and use the advance search tool if you want a direct or refundable flight. You can narrow your search to show you just your preferred cabin class and airline, too. It’s all easy. You can book direct flights from Seattle to St. Louis that take around hours.

Find cheap flights from Seattle to St. Louis

From the great flight deals with prices currently ranging from AU$324 to AU$411, you can choose to see the cheapest flights first. Generally, you can book the cheapest flights from Seattle to St. Louis around 4 to 6 weeks in advance. If your travel dates are flexible, try to avoid weekends and peak seasons – when you are more likely to grab the lowest prices. Even last minute, there are some impressive deals. The cheapest time to fly to St. Louis is normally in January.

Reasons to book your flight from Seattle to St. Louis with Expedia

Expedia makes it easy to find, book, and travel, with everything you need all in one place. When you enter your travel details, find fantastic deals just for you on flight tickets from Seattle to St. Louis across all the main airline carriers, so you can save time, dollars, and hassle finding the perfect flight. If you think your plans could change, choose refundable flights so any changes won’t cost you more. Book your flight to St. Louis right now and, if you join Expedia Rewards, you earn points this time and every time you travel with Expedia.

Frequently asked questions

How much is a flight from SEA to STL?
Based on fares listed within the last 7 days on Expedia for flights departing within the next year, round-trip flights between SEA and Lambert Field start from AU$324. Book now to get the best price for your big adventure. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from SEA to Lambert-St. Louis Intl. Airport (STL)?
The majority of flights can be cancelled online, but whether you incur a fee differs between airlines. If you do have to cancel your getaway, follow the instructions in the Customer Service Portal.
How do I find cheap flights from Seattle - Tacoma Intl. Airport (SEA) to Lambert Field that have flexible change policies?
Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you’re searching for Seattle - Tacoma Intl. Airport (SEA) to STL flights, you’ll see a “no change fees” filter for you to select.
How far is the flight from Seattle - Tacoma Intl. Airport (SEA) to Lambert-St. Louis Intl. Airport (STL)?
The flight distance from SeaTac to St. Louis is 2 700 kilometres. Pack yourself a drink, a snack and an interesting book to read. Keep yourself entertained and the hours will zip by.
Which airlines fly direct from Sea-Tac Airport to STL?
A favourite with many savvy travellers, Alaska Airlines (AS) operates 30 monthly flights from SEA to STL. Pick the one that fits in with your travel plans and book your ticket today.
Are SEA to St. Louis Lambert International Airport flight tickets cheaper when they're purchased at the last minute?
Booking your trip from Sea-Tac Airport to St. Louis Lambert International Airport at the last minute could be your ticket to an awesome deal. However, it might cost you a whole lot more! If you’d prefer not to take any chances, book well ahead of your departure date. In fact, Expedia has some of the best bargains as far ahead as 12 months in advance. If your preferred air carrier hasn’t released tickets yet, check back regularly as deals are updated on Expedia all the time.
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