Search flights from Saint Louis (STL) to Seattle (SEA)

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Cheapest flights to Seattle

The cheapest flights available in the next 60 days – prices are updated regularly

Flying from Saint Louis to Seattle: things to know

The most popular route is from Lambert - St. Louis International Airport in Saint Louis to Sea-Tac Airport in Seattle. On average this flight takes 4 hours 44 minutes one-way and costs $892 round-trip.

Most popular route
Lambert - St. Louis International Airport (STL) to Sea-Tac Airport (SEA)
Average flight time
4 hours 44 minutes
Average round-trip price
$892
Fly from Saint Louis to Seattle
8 airlines

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Airlines that fly from Saint Louis to Seattle

Airline options may vary according to recently booked flights and your search terms

  • Alaska Airlines
  • American Airlines
  • United Airlines
  • Hawaiian Airlines
  • Frontier Airlines
  • Spirit Airlines
  • Southwest Airlines
  • Sun Country

Frequently asked questions

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Flights to Washington State

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Flights to Sea-Tac Airport

Jet into this airport to explore Seattle at your leisure.

Flights to Snohomish County Airport

Jet into this airport to explore Seattle at your leisure.

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Hotels in Seattle

A popular choice with visitors to the United States.
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