Direct flights from Saint Louis to Seattle
All flights from STL to SEA non-stop. There are direct flights from Saint Louis Airport (STL), Missouri, USA to Seattle Tacoma International (SEA), Washington, USA with Alaska Airlines and Southwest Airlines. 23 weekly departures are currently scheduled on this route. Departure times range from 06:00 to 19:41 depending on the schedule period. The flight distance is 1714 miles (2758 km). Flight time ranges from 4 hours and 20 minutes to 4 hours and 42 minutes.
Saint Louis
, USA
Flight schedule from Saint Louis to Seattle with Alaska Airlines
This is a weekly direct flight schedule for Alaska Airlines. Use the arrows or click on the date to change week. Click on any flight departure time to show more information and check availability.
Flight
The timetable & schedule information was updated at 2026-08-24
Flight schedule from Saint Louis to Seattle with Southwest Airlines
This is a weekly direct flight schedule for Southwest Airlines. Use the arrows or click on the date to change week. Click on any flight departure time to show more information and check availability.
Flight
The timetable & schedule information was updated at 2026-08-24
Saint Louis to Seattle scheduled departures
Select a date to see every published non-stop departure between STL and SEA.
STL - SEA route facts
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Distance1714 miles (2758 km)
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Flight time4 hours and 20 minutes to 4 hours and 42 minutes
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Airlines Alaska Airlines Southwest
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Airline alliancesoneworld Low-cost carrier
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CabinsEconomy Business First
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Hub airportsAlaska Airlines: SEA (Primary hub.)
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Departure terminalsAlaska Airlines: Terminal 1Southwest Airlines: Terminal 2
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AircraftAlaska Airlines: Boeing 737-900 (winglets) Passenger/BBJ3, Boeing 737MAX 9 Passenger, Boeing 737-800 (winglets) Passenger/BBJ2 and Boeing 737MAX 8 PassengerSouthwest Airlines: Boeing 737-800 (winglets) Passenger/BBJ2 and Boeing 737MAX 8 Passenger
