S$195 Cheap Flights from Seattle to St. Louis

View S$195 flight on Sat, 11 Apr, 2026Opens in a new window

Popular airlines from Seattle-Tacoma International Airport (SEA) to St. Louis Lambert Intl. Airport (STL)

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

Prices were available within the past 7 days and start at S$195 for one-way flights and S$416 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Sat, 11 Apr - Sat, 18 Apr
SEA
Seattle
STL
St. Louis
S$416 Return, found 3 days ago
S$416
Return
found 3 days ago
Select American Airlines flight, departing Sat, 11 Apr from Seattle to St. Louis, returning Sat, 18 Apr, priced at S$416 found 3 days ago
Delta
Sat, 11 Apr - Sat, 18 Apr
SEA
Seattle
STL
St. Louis
S$423 Return, found 3 days ago
S$423
Return
found 3 days ago
Select Delta flight, departing Sat, 11 Apr from Seattle to St. Louis, returning Sat, 18 Apr, priced at S$423 found 3 days ago
American Airlines
Sat, 11 Apr - Sat, 18 Apr
SEA
Seattle
STL
St. Louis
S$428 Return, found 3 days ago
S$428
Return
found 3 days ago
Select American Airlines flight, departing Sat, 11 Apr from Seattle to St. Louis, returning Sat, 18 Apr, priced at S$428 found 3 days ago
Delta
Sat, 11 Apr - Sat, 18 Apr
SEA
Seattle
STL
St. Louis
S$436 Return, found 3 days ago
S$436
Return
found 3 days ago
Select Delta flight, departing Sat, 11 Apr from Seattle to St. Louis, returning Sat, 18 Apr, priced at S$436 found 3 days ago
American Airlines
Sat, 11 Apr - Sat, 18 Apr
SEA
Seattle
STL
St. Louis
S$453 Return, found 3 days ago
S$453
Return
found 3 days ago
Select American Airlines flight, departing Sat, 11 Apr from Seattle to St. Louis, returning Sat, 18 Apr, priced at S$453 found 3 days ago
American Airlines
Sat, 11 Apr - Sat, 18 Apr
SEA
Seattle
STL
St. Louis
S$466 Return, found 3 days ago
S$466
Return
found 3 days ago
Select American Airlines flight, departing Sat, 11 Apr from Seattle to St. Louis, returning Sat, 18 Apr, priced at S$466 found 3 days ago
American Airlines
Sat, 11 Apr - Sat, 18 Apr
SEA
Seattle
STL
St. Louis
S$505 Return, found 3 days ago
S$505
Return
found 3 days ago
Select American Airlines flight, departing Sat, 11 Apr from Seattle to St. Louis, returning Sat, 18 Apr, priced at S$505 found 3 days ago
American Airlines
Sat, 11 Apr - Sat, 18 Apr
SEA
Seattle
STL
St. Louis
S$518 Return, found 3 days ago
S$518
Return
found 3 days ago
Select American Airlines flight, departing Sat, 11 Apr from Seattle to St. Louis, returning Sat, 18 Apr, priced at S$518 found 3 days ago
American Airlines
Sat, 11 Apr - Sat, 18 Apr
SEA
Seattle
STL
St. Louis
S$543 Return, found 3 days ago
S$543
Return
found 3 days ago
Select American Airlines flight, departing Sat, 11 Apr from Seattle to St. Louis, returning Sat, 18 Apr, priced at S$543 found 3 days ago

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Find the cheapest month to fly from Seattle (SEA) to St. Louis (STL)

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From S$164 - S$288 per traveller.

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 S$416. 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.

Travel information

Origin airport
Seattle - Tacoma Intl.
Destination airport
Lambert-St. Louis Intl.
Return price
S$415
Distance
2728 km
Average flight time
5 hours 54 mins

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Perfect flights from Seattle to St. Louis

Your Journey from Seattle to St. Louis

Start your unforgettable journey with Expedia. Our broad selection of flights from Seattle to St. Louis caters to every travel need. Whether you're yearning for a romantic escape, a solo adventure, or a cultural immersion, we've got you covered.
 

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With Expedia, you have access to a wide range of airlines, including American Airlines, Delta, United. Our selection of flights from Seattle - Tacoma Intl. to Lambert-St. Louis Intl. caters to every traveler's requirements, ensuring your journey aligns with your schedule. With options from 20 airlines, you're bound to find the perfect flight.
 

Maximizing Value with Seattle to St. Louis Flights

Experience the joy of finding cheap flights from Seattle - Tacoma Intl. to Lambert-St. Louis Intl. that fit your budget. Keep an eye out for our special deals and discounts, and check our flexible one-way fares from S$195 and roundtrip prices from S$416*.
 

Pre-Flight Essentials

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Experience the Vibrant St. Louis

Picture yourself stepping off the plane in St. Louis and immersing yourself in the unique atmosphere of . From local markets to cultural festivals, each city offers its distinct charm. Make the most of your trip by exploring local attractions and indulging in the local cuisine. With Expedia, explore all this and more, tailored to your budget.
 

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Traveling with Expedia is more than just a flight. We offer details about in-flight amenities, baggage policies, and more to ensure a smooth and hassle-free journey. Choose from our variety of airlines and embark on a memorable journey from Seattle to St. Louis.
 

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With Expedia, your adventure extends beyond the flight. Explore St. Louis at your own pace by renting a car or booking a hotel. Discover hidden gems off the beaten path and create unforgettable memories.
 

Book Your Flight from Seattle to St. Louis with Confidence

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*Note: Prices may vary based on availability and are subject to change.
Perfect flights from Seattle to St. Louis

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