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Direct flights from Seattle to Saint Louis

Airlines Schedules

SEA - STL route map 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. 23 weekly departures are currently scheduled on this route. Departure times range from 08:03 to 18:08 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.

SEA
Seattle Tacoma
USASeattle , USA
STL
Saint Louis Airport
USASaint Louis , USA
SEA
Seattle Tacoma
USASeattle , USA
Saint Louis Airport
USASaint Louis , USA
STL
Flight time 3h 50min to 4h 8min
Updated Aug 24, 2026
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Airlines with non-stop routes:

Alaska Airlines oneworld

Departure times vary between 08:03 and 18:08
S
M
T
W
T
F
S
Sun
Mon
Tue
Wed
Thu
Fri
Sat
18 flights/week
18 flights/week

Southwest Airlines Low-cost carrier

Departure times vary between 09:40 and 12:05
S
M
T
W
T
F
S
Sun
Mon
Tue
Wed
Thu
Fri
Sat
5 flights/week
5 flights/week
Weekday-labels: HAS FLIGHTS UPCOMING NO FLIGHTS
View all flight dates
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
Mon
Sep 21
Tue
Sep 22
Wed
Sep 23
Thu
Sep 24
Fri
Sep 25
Sat
Sep 26
Sun
Sep 27
AS388
08:13
08:13
08:13
08:13
08:13
08:13
08:13
AS672
12:35
12:35
12:35
12:35
12:35
12:35
12:35
AS472
18:03
----
----
18:03
18:03
----
18:03

The timetable & schedule information was updated at 2026-08-24

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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
Mon
Sep 21
Tue
Sep 22
Wed
Sep 23
Thu
Sep 24
Fri
Sep 25
Sat
Sep 26
Sun
Sep 27
WN3149
----
----
----
----
----
09:40
----
WN4060
----
----
----
----
----
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11:20
WN2631
12:05
----
----
12:05
12:05
----
----

The timetable & schedule information was updated at 2026-08-24

RETURN SCHEDULE
CHECK PRICES
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Seattle to Saint Louis scheduled departures

Select a date to see every published non-stop departure between SEA and STL.

Tuesday
Tue
Sep 22
2 flights(2)
Wednesday
Wed
Sep 23
2 flights(2)
Thursday
Thu
Sep 24
4 flights(4)
Friday
Fri
Sep 25
4 flights(4)
Saturday
Sat
Sep 26
3 flights(3)
Sunday
Sun
Sep 27
4 flights(4)
Monday
Mon
Sep 28
4 flights(4)
Time
Airline
Flight
08:13
Alaska Airlines Alaska Airlines
AS388
12:35
Alaska Airlines Alaska Airlines
AS672
08:13
Alaska Airlines Alaska Airlines
AS388
12:35
Alaska Airlines Alaska Airlines
AS672
08:13
Alaska Airlines Alaska Airlines
AS388
12:05
Southwest Airlines Southwest Airlines
WN2631
12:35
Alaska Airlines Alaska Airlines
AS672
18:03
Alaska Airlines Alaska Airlines
AS472
08:13
Alaska Airlines Alaska Airlines
AS388
12:05
Southwest Airlines Southwest Airlines
WN2631
12:35
Alaska Airlines Alaska Airlines
AS672
18:03
Alaska Airlines Alaska Airlines
AS472
08:13
Alaska Airlines Alaska Airlines
AS388
09:40
Southwest Airlines Southwest Airlines
WN3149
12:35
Alaska Airlines Alaska Airlines
AS672
08:13
Alaska Airlines Alaska Airlines
AS388
11:20
Southwest Airlines Southwest Airlines
WN4060
12:35
Alaska Airlines Alaska Airlines
AS672
18:03
Alaska Airlines Alaska Airlines
AS472
08:13
Alaska Airlines Alaska Airlines
AS388
12:05
Southwest Airlines Southwest Airlines
WN2631
12:35
Alaska Airlines Alaska Airlines
AS672
18:03
Alaska Airlines Alaska Airlines
AS472
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SEA-STL flight route
Route map from Seattle, SEA to Saint Louis, STL. The distance is 1714 miles or 2758 km.
Seattle - Saint Louis direct flight map
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SEA - STL route facts

  • Distance
    1714 miles (2758 km)
  • Flight time
    3 hours and 50 minutes to 4 hours and 8 minutes
  • Airlines
    Alaska Airlines Alaska Airlines
    Southwest Southwest
  • Airline alliances
    oneworld Low-cost carrier
  • Cabins
    Economy Business First
  • Hub airports
    Alaska Airlines: SEA (Primary hub.)
  • Arrival terminals
    Alaska Airlines: Terminal 1
    Southwest Airlines: Terminal 2
  • Aircraft
    Alaska Airlines: Boeing 737MAX 9 Passenger, Boeing 737-900 (winglets) Passenger/BBJ3, Boeing 737-800 (winglets) Passenger/BBJ2 and Boeing 737MAX 8 Passenger
    Southwest Airlines: Boeing 737MAX 8 Passenger, Boeing 737-700 Passenger (Scimitar Winglets) and Boeing 737-800 (winglets) Passenger/BBJ2

Route FAQ

Alaska Airlines and Southwest Airlines operate non-stop flights from SEA to STL with 23 weekly departures.

Scheduled flight time from SEA to STL ranges from 3 hours and 50 minutes to 4 hours and 8 minutes. The route covers 1714 miles (2758 km).

23 weekly departures are currently scheduled on this route, with published departure times ranging from 08:03 to 18:08 depending on the schedule period.

Arrival terminals: Alaska Airlines: Terminal 1 and Southwest Airlines: Terminal 2.

Economy, Business and First are currently scheduled on non-stop flights for this route.
Direct flights from Seattle to MO, USA
From Seattle to Kansas City

MCI Kansas City International Airport
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