Southwest Airlines flights from Seattle-Tacoma (SEA) to Saint Louis (STL).

FLIGHT SCHEDULE
Direct Flights:
Sun 11:00 Seattle-Tacoma (SEA) 16:50 Saint Louis (STL) 2 Southwest Airlines WN 140 Non-stop Boeing 737-800 (73H) 3:50 Effective 2026-06-07 through 2026-08-02
Mon,Thu,Fri 09:00 Seattle-Tacoma (SEA) 14:50 Saint Louis (STL) 2 Southwest Airlines WN 3632 Non-stop Boeing 737 MAX 8 (7M8) 3:50 Effective 2026-06-04 through 2026-08-03
Tue,Wed 09:30 Seattle-Tacoma (SEA) 15:20 Saint Louis (STL) 2 Southwest Airlines WN 3632 Non-stop Boeing 737-800 (73H) 3:50 Effective 2026-06-09 through 2026-07-29
Sat 09:40 Seattle-Tacoma (SEA) 15:30 Saint Louis (STL) 2 Southwest Airlines WN 4060 Non-stop Boeing 737 MAX 8 (7M8) 3:50 Effective 2026-08-08 through 2026-09-26
Sun 11:20 Seattle-Tacoma (SEA) 17:15 Saint Louis (STL) 2 Southwest Airlines WN 4060 Non-stop Boeing 737-800 (73H) 3:55 Effective 2026-08-09 through 2026-09-27
Mon,Thu,Fri 12:05 Seattle-Tacoma (SEA) 18:05 Saint Louis (STL) 2 Southwest Airlines WN 4060 Non-stop Boeing 737-700 (Scimitar Winglets) 4:00 Effective 2026-08-06 through 2026-09-28
Sat 12:00 Seattle-Tacoma (SEA) 18:00 Saint Louis (STL) 2 Southwest Airlines WN 4619 Non-stop Boeing 737-700 (Scimitar Winglets) 4:00 Effective 2026-06-06 through 2026-08-01
Non-Direct Flights:
Sun 14:25 Seattle-Tacoma (SEA) 22:50 Saint Louis (STL) 2 Southwest Airlines WN 1975 1-stop Boeing 737 MAX 8 (7M8) 6:25 Operates only on 2026-05-24
Sun 06:30 Seattle-Tacoma (SEA) 14:50 Saint Louis (STL) 2 Southwest Airlines WN 2650 1-stop Boeing 737 MAX 8 (7M8) 6:20 Effective 2026-04-12 through 2026-05-17
Sun 06:30 Seattle-Tacoma (SEA) 14:50 Saint Louis (STL) 2 Southwest Airlines WN 2650 1-stop Boeing 737 MAX 8 (7M8) 6:20 Operates only on 2026-05-31
Mon,Thu,Fri 17:20 Seattle-Tacoma (SEA) 01:50 Saint Louis (STL) 2 Southwest Airlines WN 3354 1-stop Boeing 737 MAX 8 (7M8) 6:30 Effective 2026-06-04 through 2026-08-03 The flight arrives 1 day after departure.

A domestic route departing from the Seattle-Tacoma airport (SEA) and arriving at Saint Louis airport (STL).
The flight distance is 1704 miles, or 2743 km.
The timezone of the departure airport is UTC-8 , and the timezone of the arrival airport is UTC-6 . Current time at the point of departure is (loading...), and (loading...) at the point of arrival. There is a (loading...) hour time difference between the airports.
For direct flights, the flight time varies between 3:50 and 4:00.

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FLIGHT SCHEDULE

Direct Flights:

Southwest Airlines WN140

11:00

Seattle-Tacoma (SEA)

16:50

Saint Louis (STL) 2

Effective 2026-06-07 through 2026-08-02

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 3:50, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN3632

09:00

Seattle-Tacoma (SEA)

14:50

Saint Louis (STL) 2

Effective 2026-06-04 through 2026-08-03

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 3:50, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN3632

09:30

Seattle-Tacoma (SEA)

15:20

Saint Louis (STL) 2

Effective 2026-06-09 through 2026-07-29

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 3:50, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN4060

09:40

Seattle-Tacoma (SEA)

15:30

Saint Louis (STL) 2

Effective 2026-08-08 through 2026-09-26

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 3:50, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN4060

11:20

Seattle-Tacoma (SEA)

17:15

Saint Louis (STL) 2

Effective 2026-08-09 through 2026-09-27

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 3:55, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN4060

12:05

Seattle-Tacoma (SEA)

18:05

Saint Louis (STL) 2

Effective 2026-08-06 through 2026-09-28

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 4:00, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN4619

12:00

Seattle-Tacoma (SEA)

18:00

Saint Louis (STL) 2

Effective 2026-06-06 through 2026-08-01

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 4:00, non-stop
Boeing 737-700 (Scimitar Winglets)

Non-Direct Flights:

Southwest Airlines WN1975

14:25

Seattle-Tacoma (SEA)

22:50

Saint Louis (STL) 2

Operates only on 2026-05-24

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 6:25, 1-stop
Boeing 737 MAX 8 (7M8)

Non-Direct Flights:

Southwest Airlines WN2650

06:30

Seattle-Tacoma (SEA)

14:50

Saint Louis (STL) 2

Effective 2026-04-12 through 2026-05-17

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 6:20, 1-stop
Boeing 737 MAX 8 (7M8)

Non-Direct Flights:

Southwest Airlines WN2650

06:30

Seattle-Tacoma (SEA)

14:50

Saint Louis (STL) 2

Operates only on 2026-05-31

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 6:20, 1-stop
Boeing 737 MAX 8 (7M8)

Non-Direct Flights:

Southwest Airlines WN3354

17:20

Seattle-Tacoma (SEA)

01:50(+1)

Saint Louis (STL) 2

Effective 2026-06-04 through 2026-08-03

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 6:30, 1-stop
Boeing 737 MAX 8 (7M8)
The flight arrives 1 day after departure.

A domestic route departing from the Seattle-Tacoma airport (SEA) and arriving at Saint Louis airport (STL).
The flight distance is 1704 miles, or 2743 km.
The timezone of the departure airport is UTC-8 , and the timezone of the arrival airport is UTC-6 . Current time at the point of departure is (loading...), and (loading...) at the point of arrival. There is a (loading...) hour time difference between the airports.
For direct flights, the flight time varies between 3:50 and 4:00.

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