S$116 Cheap Flights from St. Louis to Seattle

View S$116 flight on Sat, 13 Dec, 2025Opens in a new window

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

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

Prices were available within the past 7 days and start at S$116 for one-way flights and S$341 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Mon, 5 Jan - Tue, 13 Jan
STL
St. Louis
SEA
Seattle
S$341 Return, found 6 days ago
S$341
Return
found 6 days ago
Select American Airlines flight, departing Mon, 5 Jan from St. Louis to Seattle, returning Tue, 13 Jan, priced at S$341 found 6 days ago
American Airlines
Mon, 5 Jan - Tue, 13 Jan
STL
St. Louis
SEA
Seattle
S$350 Return, found 6 days ago
S$350
Return
found 6 days ago
Select American Airlines flight, departing Mon, 5 Jan from St. Louis to Seattle, returning Tue, 13 Jan, priced at S$350 found 6 days ago
American Airlines
Mon, 5 Jan - Tue, 13 Jan
STL
St. Louis
SEA
Seattle
S$355 Return, found 6 days ago
S$355
Return
found 6 days ago
Select American Airlines flight, departing Mon, 5 Jan from St. Louis to Seattle, returning Tue, 13 Jan, priced at S$355 found 6 days ago
American Airlines
Mon, 5 Jan - Tue, 13 Jan
STL
St. Louis
SEA
Seattle
S$376 Return, found 6 days ago
S$376
Return
found 6 days ago
Select American Airlines flight, departing Mon, 5 Jan from St. Louis to Seattle, returning Tue, 13 Jan, priced at S$376 found 6 days ago
American Airlines
Mon, 5 Jan - Tue, 13 Jan
STL
St. Louis
SEA
Seattle
S$387 Return, found 6 days ago
S$387
Return
found 6 days ago
Select American Airlines flight, departing Mon, 5 Jan from St. Louis to Seattle, returning Tue, 13 Jan, priced at S$387 found 6 days ago
American Airlines
Mon, 5 Jan - Tue, 13 Jan
STL
St. Louis
SEA
Seattle
S$396 Return, found 6 days ago
S$396
Return
found 6 days ago
Select American Airlines flight, departing Mon, 5 Jan from St. Louis to Seattle, returning Tue, 13 Jan, priced at S$396 found 6 days ago
Delta
Mon, 5 Jan - Tue, 13 Jan
STL
St. Louis
SEA
Seattle
S$401 Return, found 6 days ago
S$401
Return
found 6 days ago
Select Delta flight, departing Mon, 5 Jan from St. Louis to Seattle, returning Tue, 13 Jan, priced at S$401 found 6 days ago
American Airlines
Mon, 5 Jan - Tue, 13 Jan
STL
St. Louis
SEA
Seattle
S$408 Return, found 6 days ago
S$408
Return
found 6 days ago
Select American Airlines flight, departing Mon, 5 Jan from St. Louis to Seattle, returning Tue, 13 Jan, priced at S$408 found 6 days ago
Alaska Airlines
Mon, 5 Jan - Tue, 13 Jan
STL
St. Louis
SEA
Seattle
S$460 Return, found 6 days ago
S$460
Return
found 6 days ago
Select Alaska Airlines flight, departing Mon, 5 Jan from St. Louis to Seattle, returning Tue, 13 Jan, priced at S$460 found 6 days ago
United
Mon, 5 Jan - Tue, 13 Jan
STL
St. Louis
SEA
Seattle
S$468 Return, found 6 days ago
S$468
Return
found 6 days ago
Select United flight, departing Mon, 5 Jan from St. Louis to Seattle, returning Tue, 13 Jan, priced at S$468 found 6 days ago

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

January is typically the cheapest month to fly

From S$165 - S$363 per traveller.
St. Louis to Seattle route information
Origin airport
Lambert-St. Louis Intl.
Destination airport
Seattle - Tacoma Intl.
Return price
S$341
Distance
2728 km
Average flight time
4 hours 53 mins

Perfect flights from St. Louis to Seattle

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Experience the joy of finding cheap flights from Lambert-St. Louis Intl. to Seattle - Tacoma Intl. that fit your budget. Keep an eye out for our special deals and discounts, and check our flexible one-way fares from S$116 and roundtrip prices from S$341*.
 

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*Note: Prices may vary based on availability and are subject to change.

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*Available to Expedia members.