Direct flights from Seattle to Saint Louis
All flights from SEA to STL non-stop. There are direct flights from Seattle Tacoma International (SEA), Washington, USA to Saint Louis Airport (STL), Missouri, USA with Alaska Airlines and Southwest Airlines. 27 weekly departures are currently scheduled on this route. Departure times range from 07:55 to 18:06 depending on the schedule period. The flight distance is 1714 miles (2758 km). Flight time ranges from 3 hours and 50 minutes to 4 hours and 8 minutes.
Seattle
, USA
Flight schedule from Seattle to Saint Louis 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 2026-06-29
Flight schedule from Seattle to Saint Louis 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 2026-06-29
Seattle to Saint Louis scheduled departures
Select a date to see every published non-stop departure between SEA and STL.
SEA - STL route facts
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Distance1714 miles (2758 km)
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Flight time3 hours and 50 minutes to 4 hours and 8 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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Arrival terminalsAlaska Airlines: Terminal 1Southwest Airlines: Terminal 2
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AircraftAlaska Airlines: Boeing 737MAX 9 Passenger, Boeing 737-900 (winglets) Passenger/BBJ3, Boeing 737-800 (winglets) Passenger/BBJ2 and Boeing 737MAX 8 PassengerSouthwest Airlines: Boeing 737MAX 8 Passenger, Boeing 737-800 (winglets) Passenger/BBJ2 and Boeing 737-700 Passenger (Scimitar Winglets)
Route FAQ
Direct flights from Seattle to MO, USA
From Seattle to Kansas City
MCI Kansas City International Airport
