Southwest Airlines flights from Saint Louis (STL) to Denver (DEN).

FLIGHT SCHEDULE
Non-Direct Flights:
Sun 15:45 Saint Louis (STL) 2 19:15 Denver (DEN) Southwest Airlines WN 101 1-stop Boeing 737-700 (Scimitar Winglets) 4:30 Operates only on 2026-01-04
Sun 06:00 Saint Louis (STL) 2 09:20 Denver (DEN) Southwest Airlines WN 239 1-stop Boeing 737 MAX 8 (7M8) 4:20 Effective 2026-06-07 through 2026-08-02
Sun 16:25 Saint Louis (STL) 2 19:05 Denver (DEN) Southwest Airlines WN 294 1-stop Boeing 737-700 (Scimitar Winglets) 3:40 Effective 2026-04-12 through 2026-05-17
Sun 16:25 Saint Louis (STL) 2 19:05 Denver (DEN) Southwest Airlines WN 294 1-stop Boeing 737-700 (Scimitar Winglets) 3:40 Operates only on 2026-05-31
Sun 12:55 Saint Louis (STL) 2 16:30 Denver (DEN) Southwest Airlines WN 339 1-stop Boeing 737-700 (Scimitar Winglets) 4:35 Effective 2026-06-07 through 2026-08-02
Sun 08:25 Saint Louis (STL) 2 11:40 Denver (DEN) Southwest Airlines WN 1300 1-stop Boeing 737-700 (Scimitar Winglets) 4:15 Effective 2026-06-07 through 2026-08-02
Thu,Fri,Sun 09:40 Saint Louis (STL) 2 12:35 Denver (DEN) Southwest Airlines WN 1335 1-stop Boeing 737-800 (73H) 3:55 Effective 2026-01-11 through 2026-01-16
Mon,Sun 09:40 Saint Louis (STL) 2 12:35 Denver (DEN) Southwest Airlines WN 1335 1-stop Boeing 737-800 (73H) 3:55 Effective 2026-01-19 through 2026-01-25
Thu,Fri,Sun 09:40 Saint Louis (STL) 2 12:35 Denver (DEN) Southwest Airlines WN 1335 1-stop Boeing 737-800 (73H) 3:55 Effective 2026-02-01 through 2026-02-06
Mon,Sun 09:40 Saint Louis (STL) 2 12:35 Denver (DEN) Southwest Airlines WN 1335 1-stop Boeing 737-800 (73H) 3:55 Effective 2026-02-09 through 2026-02-15
Mon,Tue,Thu 09:40 Saint Louis (STL) 2 12:35 Denver (DEN) Southwest Airlines WN 1335 1-stop Boeing 737-800 (73H) 3:55 Effective 2026-02-17 through 2026-02-23
Mon 09:40 Saint Louis (STL) 2 12:35 Denver (DEN) Southwest Airlines WN 1335 1-stop Boeing 737-800 (73H) 3:55 Operates only on 2026-03-02
Sat 13:50 Saint Louis (STL) 2 16:50 Denver (DEN) Southwest Airlines WN 1335 1-stop Boeing 737 MAX 8 (7M8) 4:00 Effective 2026-01-10 through 2026-02-07
Sat 06:10 Saint Louis (STL) 2 09:45 Denver (DEN) Southwest Airlines WN 1473 1-stop Boeing 737-800 (73H) 4:35 Effective 2026-04-11 through 2026-05-30
Mon,Thu,Fri 16:10 Saint Louis (STL) 2 20:15 Denver (DEN) Southwest Airlines WN 1473 1-stop Boeing 737-800 (73H) 5:05 Effective 2026-04-09 through 2026-06-01
Sun 08:30 Saint Louis (STL) 2 10:55 Denver (DEN) Southwest Airlines WN 1476 1-stop Boeing 737-700 (Scimitar Winglets) 3:25 Effective 2026-06-07 through 2026-08-02
Sun 16:05 Saint Louis (STL) 2 18:40 Denver (DEN) Southwest Airlines WN 1574 1-stop Boeing 737-700 (Scimitar Winglets) 3:35 Effective 2026-06-07 through 2026-08-02
Sat 09:45 Saint Louis (STL) 2 12:15 Denver (DEN) Southwest Airlines WN 1929 1-stop Boeing 737-700 (Scimitar Winglets) 3:30 Operates only on 2026-01-03
Tue,Wed 06:10 Saint Louis (STL) 2 09:45 Denver (DEN) Southwest Airlines WN 2345 1-stop Boeing 737 MAX 8 (7M8) 4:35 Effective 2026-03-10 through 2026-04-01
Fri,Sun 09:50 Saint Louis (STL) 2 12:25 Denver (DEN) Southwest Airlines WN 2426 1-stop Boeing 737-700 (Scimitar Winglets) 3:35 Effective 2026-01-02 through 2026-01-04
Mon,Thu,Fri 10:35 Saint Louis (STL) 2 14:20 Denver (DEN) Southwest Airlines WN 4199 1-stop Boeing 737-800 (73H) 4:45 Effective 2026-02-12 through 2026-02-16
Thu,Fri,Sun 10:35 Saint Louis (STL) 2 14:20 Denver (DEN) Southwest Airlines WN 4199 1-stop Boeing 737-800 (73H) 4:45 Effective 2026-02-20 through 2026-03-01
Sat 08:25 Saint Louis (STL) 2 11:00 Denver (DEN) Southwest Airlines WN 4313 1-stop Boeing 737-700 (Scimitar Winglets) 3:35 Effective 2026-03-07 through 2026-04-04
Thu,Fri,Sun 09:40 Saint Louis (STL) 2 17:40 Denver (DEN) Southwest Airlines WN 1316 3-stop Boeing 737-700 (Scimitar Winglets) 9:00 Effective 2026-01-11 through 2026-01-16
Mon 09:40 Saint Louis (STL) 2 17:40 Denver (DEN) Southwest Airlines WN 1316 3-stop Boeing 737-700 (Scimitar Winglets) 9:00 Operates only on 2026-01-19
Sun 09:40 Saint Louis (STL) 2 17:40 Denver (DEN) Southwest Airlines WN 1316 3-stop Boeing 737-700 (Scimitar Winglets) 9:00 Effective 2026-01-25 through 2026-02-01
Mon,Thu,Fri 09:40 Saint Louis (STL) 2 17:40 Denver (DEN) Southwest Airlines WN 1316 3-stop Boeing 737-700 (Scimitar Winglets) 9:00 Effective 2026-02-05 through 2026-02-09
Tue,Thu,Sun 09:40 Saint Louis (STL) 2 17:40 Denver (DEN) Southwest Airlines WN 1316 3-stop Boeing 737-700 (Scimitar Winglets) 9:00 Effective 2026-02-15 through 2026-02-19
Mon 09:40 Saint Louis (STL) 2 17:40 Denver (DEN) Southwest Airlines WN 1316 3-stop Boeing 737-700 (Scimitar Winglets) 9:00 Effective 2026-02-23 through 2026-03-02

1 2 3 4 5

A domestic route departing from the Saint Louis airport (STL) and arriving at Denver airport (DEN).
The flight distance is 767 miles, or 1235 km.
The timezone of the departure airport is UTC-6 , and the timezone of the arrival airport is UTC-7 . 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 2:10 and 2:35.

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Southwest Airlines flights from Saint Louis (STL) to Denver (DEN).

FLIGHT SCHEDULE

Non-Direct Flights:

Southwest Airlines WN101

15:45

Saint Louis (STL) 2

19:15

Denver (DEN)

Operates only on 2026-01-04

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 4:30, 1-stop
Boeing 737-700 (Scimitar Winglets)

Non-Direct Flights:

Southwest Airlines WN239

06:00

Saint Louis (STL) 2

09:20

Denver (DEN)

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

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 4:20, 1-stop
Boeing 737 MAX 8 (7M8)

Non-Direct Flights:

Southwest Airlines WN294

16:25

Saint Louis (STL) 2

19:05

Denver (DEN)

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

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 3:40, 1-stop
Boeing 737-700 (Scimitar Winglets)

Non-Direct Flights:

Southwest Airlines WN294

16:25

Saint Louis (STL) 2

19:05

Denver (DEN)

Operates only on 2026-05-31

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 3:40, 1-stop
Boeing 737-700 (Scimitar Winglets)

Non-Direct Flights:

Southwest Airlines WN339

12:55

Saint Louis (STL) 2

16:30

Denver (DEN)

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

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 4:35, 1-stop
Boeing 737-700 (Scimitar Winglets)

Non-Direct Flights:

Southwest Airlines WN1300

08:25

Saint Louis (STL) 2

11:40

Denver (DEN)

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

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 4:15, 1-stop
Boeing 737-700 (Scimitar Winglets)

Non-Direct Flights:

Southwest Airlines WN1335

09:40

Saint Louis (STL) 2

12:35

Denver (DEN)

Effective 2026-01-11 through 2026-01-16

Mon
-

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun

Duration: 3:55, 1-stop
Boeing 737-800 (73H)

Non-Direct Flights:

Southwest Airlines WN1335

09:40

Saint Louis (STL) 2

12:35

Denver (DEN)

Effective 2026-01-19 through 2026-01-25

Mon

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 3:55, 1-stop
Boeing 737-800 (73H)

Non-Direct Flights:

Southwest Airlines WN1335

09:40

Saint Louis (STL) 2

12:35

Denver (DEN)

Effective 2026-02-01 through 2026-02-06

Mon
-

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun

Duration: 3:55, 1-stop
Boeing 737-800 (73H)

Non-Direct Flights:

Southwest Airlines WN1335

09:40

Saint Louis (STL) 2

12:35

Denver (DEN)

Effective 2026-02-09 through 2026-02-15

Mon

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 3:55, 1-stop
Boeing 737-800 (73H)

Non-Direct Flights:

Southwest Airlines WN1335

09:40

Saint Louis (STL) 2

12:35

Denver (DEN)

Effective 2026-02-17 through 2026-02-23

Mon

Tue

Wed
-

Thu

Fri
-

Sat
-

Sun
-

Duration: 3:55, 1-stop
Boeing 737-800 (73H)

Non-Direct Flights:

Southwest Airlines WN1335

09:40

Saint Louis (STL) 2

12:35

Denver (DEN)

Operates only on 2026-03-02

Mon

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 3:55, 1-stop
Boeing 737-800 (73H)

Non-Direct Flights:

Southwest Airlines WN1335

13:50

Saint Louis (STL) 2

16:50

Denver (DEN)

Effective 2026-01-10 through 2026-02-07

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 4:00, 1-stop
Boeing 737 MAX 8 (7M8)

Non-Direct Flights:

Southwest Airlines WN1473

06:10

Saint Louis (STL) 2

09:45

Denver (DEN)

Effective 2026-04-11 through 2026-05-30

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 4:35, 1-stop
Boeing 737-800 (73H)

Non-Direct Flights:

Southwest Airlines WN1473

16:10

Saint Louis (STL) 2

20:15

Denver (DEN)

Effective 2026-04-09 through 2026-06-01

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 5:05, 1-stop
Boeing 737-800 (73H)

Non-Direct Flights:

Southwest Airlines WN1476

08:30

Saint Louis (STL) 2

10:55

Denver (DEN)

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

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 3:25, 1-stop
Boeing 737-700 (Scimitar Winglets)

Non-Direct Flights:

Southwest Airlines WN1574

16:05

Saint Louis (STL) 2

18:40

Denver (DEN)

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

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 3:35, 1-stop
Boeing 737-700 (Scimitar Winglets)

Non-Direct Flights:

Southwest Airlines WN1929

09:45

Saint Louis (STL) 2

12:15

Denver (DEN)

Operates only on 2026-01-03

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 3:30, 1-stop
Boeing 737-700 (Scimitar Winglets)

Non-Direct Flights:

Southwest Airlines WN2345

06:10

Saint Louis (STL) 2

09:45

Denver (DEN)

Effective 2026-03-10 through 2026-04-01

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 4:35, 1-stop
Boeing 737 MAX 8 (7M8)

Non-Direct Flights:

Southwest Airlines WN2426

09:50

Saint Louis (STL) 2

12:25

Denver (DEN)

Effective 2026-01-02 through 2026-01-04

Mon
-

Tue
-

Wed
-

Thu
-

Fri

Sat
-

Sun

Duration: 3:35, 1-stop
Boeing 737-700 (Scimitar Winglets)

Non-Direct Flights:

Southwest Airlines WN4199

10:35

Saint Louis (STL) 2

14:20

Denver (DEN)

Effective 2026-02-12 through 2026-02-16

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 4:45, 1-stop
Boeing 737-800 (73H)

Non-Direct Flights:

Southwest Airlines WN4199

10:35

Saint Louis (STL) 2

14:20

Denver (DEN)

Effective 2026-02-20 through 2026-03-01

Mon
-

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun

Duration: 4:45, 1-stop
Boeing 737-800 (73H)

Non-Direct Flights:

Southwest Airlines WN4313

08:25

Saint Louis (STL) 2

11:00

Denver (DEN)

Effective 2026-03-07 through 2026-04-04

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 3:35, 1-stop
Boeing 737-700 (Scimitar Winglets)

Non-Direct Flights:

Southwest Airlines WN1316

09:40

Saint Louis (STL) 2

17:40

Denver (DEN)

Effective 2026-01-11 through 2026-01-16

Mon
-

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun

Duration: 9:00, 3-stop
Boeing 737-700 (Scimitar Winglets)

Non-Direct Flights:

Southwest Airlines WN1316

09:40

Saint Louis (STL) 2

17:40

Denver (DEN)

Operates only on 2026-01-19

Mon

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 9:00, 3-stop
Boeing 737-700 (Scimitar Winglets)

Non-Direct Flights:

Southwest Airlines WN1316

09:40

Saint Louis (STL) 2

17:40

Denver (DEN)

Effective 2026-01-25 through 2026-02-01

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 9:00, 3-stop
Boeing 737-700 (Scimitar Winglets)

Non-Direct Flights:

Southwest Airlines WN1316

09:40

Saint Louis (STL) 2

17:40

Denver (DEN)

Effective 2026-02-05 through 2026-02-09

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 9:00, 3-stop
Boeing 737-700 (Scimitar Winglets)

Non-Direct Flights:

Southwest Airlines WN1316

09:40

Saint Louis (STL) 2

17:40

Denver (DEN)

Effective 2026-02-15 through 2026-02-19

Mon
-

Tue

Wed
-

Thu

Fri
-

Sat
-

Sun

Duration: 9:00, 3-stop
Boeing 737-700 (Scimitar Winglets)

Non-Direct Flights:

Southwest Airlines WN1316

09:40

Saint Louis (STL) 2

17:40

Denver (DEN)

Effective 2026-02-23 through 2026-03-02

Mon

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 9:00, 3-stop
Boeing 737-700 (Scimitar Winglets)

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A domestic route departing from the Saint Louis airport (STL) and arriving at Denver airport (DEN).
The flight distance is 767 miles, or 1235 km.
The timezone of the departure airport is UTC-6 , and the timezone of the arrival airport is UTC-7 . 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 2:10 and 2:35.

All STL-DEN flights

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