All airlines flying from Denver (DEN) to Saint Louis (STL).

FLIGHT SCHEDULE
Direct Flights:
Sun 19:15 Denver (DEN) 22:20 Saint Louis (STL) 2 Southwest Airlines WN 4355 Non-stop Boeing 737 MAX 8 (7M8) 2:05 Operates only on 2026-05-31
Mon,Thu,Fri 06:20 Denver (DEN) 09:35 Saint Louis (STL) 2 Southwest Airlines WN 4382 Non-stop Boeing 737-700 (Scimitar Winglets) 2:15 Effective 2026-02-12 through 2026-02-16
Sat 06:20 Denver (DEN) 09:35 Saint Louis (STL) 2 Southwest Airlines WN 4382 Non-stop Boeing 737-800 (73H) 2:15 Effective 2026-02-14 through 2026-02-28
Thu,Fri,Sun 06:20 Denver (DEN) 09:35 Saint Louis (STL) 2 Southwest Airlines WN 4382 Non-stop Boeing 737-700 (Scimitar Winglets) 2:15 Effective 2026-02-20 through 2026-03-01
Mon-Fri 07:00 Denver (DEN) 10:15 Saint Louis (STL) 2 Southwest Airlines WN 4382 Non-stop Boeing 737-700 (Scimitar Winglets) 2:15 Effective 2026-01-06 through 2026-01-14
Tue-Fri,Sun 07:00 Denver (DEN) 10:15 Saint Louis (STL) 2 Southwest Airlines WN 4382 Non-stop Boeing 737-700 (Scimitar Winglets) 2:15 Effective 2026-01-18 through 2026-01-23
Mon-Fri 07:00 Denver (DEN) 10:15 Saint Louis (STL) 2 Southwest Airlines WN 4382 Non-stop Boeing 737-700 (Scimitar Winglets) 2:15 Effective 2026-01-26 through 2026-02-04
Tue,Wed,Sun 07:00 Denver (DEN) 10:15 Saint Louis (STL) 2 Southwest Airlines WN 4382 Non-stop Boeing 737-700 (Scimitar Winglets) 2:15 Effective 2026-02-08 through 2026-02-11
Tue,Wed 07:00 Denver (DEN) 10:15 Saint Louis (STL) 2 Southwest Airlines WN 4382 Non-stop Boeing 737-700 (Scimitar Winglets) 2:15 Effective 2026-02-18 through 2026-03-04
Sat 09:45 Denver (DEN) 12:55 Saint Louis (STL) 2 Southwest Airlines WN 4382 Non-stop Boeing 737 MAX 8 (7M8) 2:10 Effective 2026-01-10 through 2026-02-07
Sun 07:15 Denver (DEN) 10:20 Saint Louis (STL) 2 Southwest Airlines WN 4474 Non-stop Boeing 737 MAX 8 (7M8) 2:05 Operates only on 2026-05-24
Sun 07:45 Denver (DEN) 10:50 Saint Louis (STL) 2 Southwest Airlines WN 4474 Non-stop Boeing 737-800 (73H) 2:05 Effective 2026-04-12 through 2026-05-17
Sun 07:45 Denver (DEN) 10:50 Saint Louis (STL) 2 Southwest Airlines WN 4474 Non-stop Boeing 737-800 (73H) 2:05 Operates only on 2026-05-31
Sat 20:30 Denver (DEN) 23:35 Saint Louis (STL) 2 Southwest Airlines WN 4721 Non-stop Boeing 737 MAX 8 (7M8) 2:05 Effective 2026-02-14 through 2026-02-28
Daily 20:20 Denver (DEN) 23:34 Saint Louis (STL) 1 United Airlines UA 4748 Non-stop Embraer EMB 175 (E7W) 2:14 Effective 2026-03-05 through 2026-03-28
Sat 12:05 Denver (DEN) 15:05 Saint Louis (STL) 2 Southwest Airlines WN 4812 Non-stop Boeing 737-700 (Scimitar Winglets) 2:00 Operates only on 2026-01-03
Mon,Tue,Fri,Sun 12:15 Denver (DEN) 15:15 Saint Louis (STL) 2 Southwest Airlines WN 4812 Non-stop Boeing 737-800 (73H) 2:00 Valid until 2026-01-04
Mon,Tue,Fri,Sun 14:50 Denver (DEN) 17:50 Saint Louis (STL) 2 Southwest Airlines WN 4813 Non-stop Boeing 737 MAX 8 (7M8) 2:00 Valid until 2026-01-04
Sun 21:45 Denver (DEN) 00:50 Saint Louis (STL) 2 Southwest Airlines WN 4981 Non-stop Boeing 737-800 (73H) 2:05 Effective 2026-08-09 through 2026-09-27 The flight arrives 1 day after departure.
Wed 17:25 Denver (DEN) 20:25 Saint Louis (STL) 2 Southwest Airlines WN 5005 Non-stop Boeing 737-700 (Scimitar Winglets) 2:00 Operates only on 2026-02-25
Sat 11:45 Denver (DEN) 14:50 Saint Louis (STL) 2 Southwest Airlines WN 5055 Non-stop Boeing 737 MAX 8 (7M8) 2:05 Operates only on 2026-01-10
Sun 15:00 Denver (DEN) 18:00 Saint Louis (STL) 2 Southwest Airlines WN 5066 Non-stop Boeing 737 MAX 8 (7M8) 2:00 Operates only on 2026-02-22
Non-Direct Flights:
Sun 10:25 Denver (DEN) 14:50 Saint Louis (STL) 2 Southwest Airlines WN 428 1-stop Boeing 737-700 (Scimitar Winglets) 3:25 Effective 2026-03-08 through 2026-04-05
Tue,Wed 08:40 Denver (DEN) 13:00 Saint Louis (STL) 2 Southwest Airlines WN 436 1-stop Boeing 737-700 (Scimitar Winglets) 3:20 Effective 2026-04-07 through 2026-06-03
Wed,Thu,Sat,Sun 15:36 Denver (DEN) 22:14 Saint Louis (STL) 1 United Airlines UA 489 1-stop Airbus A321neo (32Q) 5:38 Effective 2026-02-12 through 2026-02-19
Tue,Fri 15:36 Denver (DEN) 22:14 Saint Louis (STL) 1 United Airlines UA 489 1-stop Boeing 737-900 (739) 5:38 Effective 2026-02-13 through 2026-02-17
Mon 15:36 Denver (DEN) 22:17 Saint Louis (STL) 1 United Airlines UA 489 1-stop Airbus A321neo (32Q) 5:41 Operates only on 2026-02-16
Mon,Wed-Sun 15:36 Denver (DEN) 22:14 Saint Louis (STL) 1 United Airlines UA 489 1-stop Airbus A321neo (32Q) 5:38 Effective 2026-02-20 through 2026-03-04
Tue 15:36 Denver (DEN) 22:14 Saint Louis (STL) 1 United Airlines UA 489 1-stop Boeing 737-900 (739) 5:38 Effective 2026-02-24 through 2026-03-03
Sun 10:00 Denver (DEN) 14:30 Saint Louis (STL) 2 Southwest Airlines WN 681 1-stop Boeing 737 MAX 8 (7M8) 3:30 Effective 2026-06-07 through 2026-08-02
Mon,Thu,Fri 14:30 Denver (DEN) 19:00 Saint Louis (STL) 2 Southwest Airlines WN 857 1-stop Boeing 737-700 (Scimitar Winglets) 3:30 Effective 2026-02-12 through 2026-02-16
Thu,Fri,Sun 14:30 Denver (DEN) 19:00 Saint Louis (STL) 2 Southwest Airlines WN 857 1-stop Boeing 737-700 (Scimitar Winglets) 3:30 Effective 2026-02-20 through 2026-03-01
Sun 14:40 Denver (DEN) 18:55 Saint Louis (STL) 2 Southwest Airlines WN 910 1-stop Boeing 737-700 (Scimitar Winglets) 3:15 Effective 2026-03-08 through 2026-04-05
Sun 12:50 Denver (DEN) 17:10 Saint Louis (STL) 2 Southwest Airlines WN 1264 1-stop Boeing 737-800 (73H) 3:20 Operates only on 2026-05-24
Mon,Thu,Fri 14:00 Denver (DEN) 18:55 Saint Louis (STL) 2 Southwest Airlines WN 1871 1-stop Boeing 737-700 (Scimitar Winglets) 3:55 Effective 2026-03-05 through 2026-04-06
Tue,Wed 07:50 Denver (DEN) 12:10 Saint Louis (STL) 2 Southwest Airlines WN 2352 1-stop Boeing 737-700 (Scimitar Winglets) 3:20 Effective 2026-03-10 through 2026-04-01
Mon,Thu,Fri 14:40 Denver (DEN) 18:55 Saint Louis (STL) 2 Southwest Airlines WN 3012 1-stop Boeing 737-700 (Scimitar Winglets) 3:15 Effective 2026-03-05 through 2026-04-06
Sun 14:30 Denver (DEN) 18:45 Saint Louis (STL) 2 Southwest Airlines WN 3643 1-stop Boeing 737-700 (Scimitar Winglets) 3:15 Effective 2026-04-12 through 2026-05-17
Sun 14:30 Denver (DEN) 18:45 Saint Louis (STL) 2 Southwest Airlines WN 3643 1-stop Boeing 737-700 (Scimitar Winglets) 3:15 Operates only on 2026-05-31
Sat 16:40 Denver (DEN) 01:45 Saint Louis (STL) 2 Southwest Airlines WN 417 2-stop Boeing 737-800 (73H) 8:05 Valid until 2026-01-03 The flight arrives 1 day after departure.
Sat 07:15 Denver (DEN) 15:20 Saint Louis (STL) 2 Southwest Airlines WN 1083 2-stop Boeing 737-700 (Scimitar Winglets) 7:05 Effective 2026-04-11 through 2026-05-30
Fri,Sun 09:40 Denver (DEN) 18:15 Saint Louis (STL) 2 Southwest Airlines WN 2220 2-stop Boeing 737-700 (Scimitar Winglets) 7:35 Effective 2026-01-02 through 2026-01-04
Sat 13:05 Denver (DEN) 20:50 Saint Louis (STL) 2 Southwest Airlines WN 2309 2-stop Boeing 737-700 (Scimitar Winglets) 6:45 Effective 2026-03-07 through 2026-04-04
Direct Codeshare Flights:
Daily 13:30 Denver (DEN) 16:26 Saint Louis (STL) 1 Air Canada AC 4878 Non-stop Airbus A319 (319) 1:56 Effective from 2026-05-21 Codeshare flight, operated by United Airlines.(UA 1315)
Mon,Wed,Sun 13:45 Denver (DEN) 16:49 Saint Louis (STL) 1 Air Canada AC 4878 Non-stop Boeing 737-900 (739) 2:04 Effective 2026-03-08 through 2026-03-25 Codeshare flight, operated by United Airlines.(UA 1315)
Daily 13:45 Denver (DEN) 16:52 Saint Louis (STL) 1 Air Canada AC 4878 Non-stop Airbus A319 (319) 2:07 Effective 2026-03-29 through 2026-04-29 Codeshare flight, operated by United Airlines.(UA 1315)
Daily 13:48 Denver (DEN) 16:55 Saint Louis (STL) 1 Air Canada AC 4878 Non-stop Boeing 737-800 (738) 2:07 Effective 2026-04-30 through 2026-05-20 Codeshare flight, operated by United Airlines.(UA 1315)
Thu 13:52 Denver (DEN) 16:56 Saint Louis (STL) 1 Air Canada AC 4878 Non-stop Boeing 737-900 (739) 2:04 Effective 2026-03-05 through 2026-03-26 Codeshare flight, operated by United Airlines.(UA 1315)
Wed-Fri,Sun 13:53 Denver (DEN) 16:55 Saint Louis (STL) 1 Air Canada AC 4878 Non-stop Boeing 737-800 (738) 2:02 Effective 2026-01-07 through 2026-01-18 Codeshare flight, operated by United Airlines.(UA 1315)
Mon,Wed-Fri,Sun 13:53 Denver (DEN) 16:55 Saint Louis (STL) 1 Air Canada AC 4878 Non-stop Boeing 737-800 (738) 2:02 Effective 2026-01-19 through 2026-01-25 Codeshare flight, operated by United Airlines.(UA 1315)

1 2 3 4 5 6 7

A domestic route departing from the Denver airport (DEN) and arriving at Saint Louis airport (STL).
The flight distance is 767 miles, or 1235 km.
The timezone of the departure airport is UTC-7 , 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 1:56 and 2:20.

Return (STL-DEN) flights

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All airlines flying from Denver (DEN) to Saint Louis (STL).

FLIGHT SCHEDULE

Direct Flights:

Southwest Airlines WN4355

19:15

Denver (DEN)

22:20

Saint Louis (STL) 2

Operates only on 2026-05-31

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 2:05, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN4382

06:20

Denver (DEN)

09:35

Saint Louis (STL) 2

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

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 2:15, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN4382

06:20

Denver (DEN)

09:35

Saint Louis (STL) 2

Effective 2026-02-14 through 2026-02-28

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 2:15, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN4382

06:20

Denver (DEN)

09:35

Saint Louis (STL) 2

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

Mon
-

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun

Duration: 2:15, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN4382

07:00

Denver (DEN)

10:15

Saint Louis (STL) 2

Effective 2026-01-06 through 2026-01-14

Mon

Tue

Wed

Thu

Fri

Sat
-

Sun
-

Duration: 2:15, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN4382

07:00

Denver (DEN)

10:15

Saint Louis (STL) 2

Effective 2026-01-18 through 2026-01-23

Mon
-

Tue

Wed

Thu

Fri

Sat
-

Sun

Duration: 2:15, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN4382

07:00

Denver (DEN)

10:15

Saint Louis (STL) 2

Effective 2026-01-26 through 2026-02-04

Mon

Tue

Wed

Thu

Fri

Sat
-

Sun
-

Duration: 2:15, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN4382

07:00

Denver (DEN)

10:15

Saint Louis (STL) 2

Effective 2026-02-08 through 2026-02-11

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun

Duration: 2:15, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN4382

07:00

Denver (DEN)

10:15

Saint Louis (STL) 2

Effective 2026-02-18 through 2026-03-04

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 2:15, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN4382

09:45

Denver (DEN)

12:55

Saint Louis (STL) 2

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

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 2:10, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN4474

07:15

Denver (DEN)

10:20

Saint Louis (STL) 2

Operates only on 2026-05-24

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 2:05, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN4474

07:45

Denver (DEN)

10:50

Saint Louis (STL) 2

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

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 2:05, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN4474

07:45

Denver (DEN)

10:50

Saint Louis (STL) 2

Operates only on 2026-05-31

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 2:05, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN4721

20:30

Denver (DEN)

23:35

Saint Louis (STL) 2

Effective 2026-02-14 through 2026-02-28

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 2:05, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

United Airlines UA4748

20:20

Denver (DEN)

23:34

Saint Louis (STL) 1

Effective 2026-03-05 through 2026-03-28

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 2:14, non-stop
Embraer EMB 175 (E7W)

Direct Flights:

Southwest Airlines WN4812

12:05

Denver (DEN)

15:05

Saint Louis (STL) 2

Operates only on 2026-01-03

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 2:00, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN4812

12:15

Denver (DEN)

15:15

Saint Louis (STL) 2

Valid until 2026-01-04

Mon

Tue

Wed
-

Thu
-

Fri

Sat
-

Sun

Duration: 2:00, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN4813

14:50

Denver (DEN)

17:50

Saint Louis (STL) 2

Valid until 2026-01-04

Mon

Tue

Wed
-

Thu
-

Fri

Sat
-

Sun

Duration: 2:00, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN4981

21:45

Denver (DEN)

00:50(+1)

Saint Louis (STL) 2

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

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 2:05, non-stop
Boeing 737-800 (73H)
The flight arrives 1 day after departure.

Direct Flights:

Southwest Airlines WN5005

17:25

Denver (DEN)

20:25

Saint Louis (STL) 2

Operates only on 2026-02-25

Mon
-

Tue
-

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 2:00, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN5055

11:45

Denver (DEN)

14:50

Saint Louis (STL) 2

Operates only on 2026-01-10

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 2:05, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN5066

15:00

Denver (DEN)

18:00

Saint Louis (STL) 2

Operates only on 2026-02-22

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 2:00, non-stop
Boeing 737 MAX 8 (7M8)

Non-Direct Flights:

Southwest Airlines WN428

10:25

Denver (DEN)

14:50

Saint Louis (STL) 2

Effective 2026-03-08 through 2026-04-05

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

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

Non-Direct Flights:

Southwest Airlines WN436

08:40

Denver (DEN)

13:00

Saint Louis (STL) 2

Effective 2026-04-07 through 2026-06-03

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 3:20, 1-stop
Boeing 737-700 (Scimitar Winglets)

Non-Direct Flights:

United Airlines UA489

15:36

Denver (DEN)

22:14

Saint Louis (STL) 1

Effective 2026-02-12 through 2026-02-19

Mon
-

Tue
-

Wed

Thu

Fri
-

Sat

Sun

Duration: 5:38, 1-stop
Airbus A321neo (32Q)

Non-Direct Flights:

United Airlines UA489

15:36

Denver (DEN)

22:14

Saint Louis (STL) 1

Effective 2026-02-13 through 2026-02-17

Mon
-

Tue

Wed
-

Thu
-

Fri

Sat
-

Sun
-

Duration: 5:38, 1-stop
Boeing 737-900 (739)

Non-Direct Flights:

United Airlines UA489

15:36

Denver (DEN)

22:17

Saint Louis (STL) 1

Operates only on 2026-02-16

Mon

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 5:41, 1-stop
Airbus A321neo (32Q)

Non-Direct Flights:

United Airlines UA489

15:36

Denver (DEN)

22:14

Saint Louis (STL) 1

Effective 2026-02-20 through 2026-03-04

Mon

Tue
-

Wed

Thu

Fri

Sat

Sun

Duration: 5:38, 1-stop
Airbus A321neo (32Q)

Non-Direct Flights:

United Airlines UA489

15:36

Denver (DEN)

22:14

Saint Louis (STL) 1

Effective 2026-02-24 through 2026-03-03

Mon
-

Tue

Wed
-

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 5:38, 1-stop
Boeing 737-900 (739)

Non-Direct Flights:

Southwest Airlines WN681

10:00

Denver (DEN)

14:30

Saint Louis (STL) 2

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

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 3:30, 1-stop
Boeing 737 MAX 8 (7M8)

Non-Direct Flights:

Southwest Airlines WN857

14:30

Denver (DEN)

19:00

Saint Louis (STL) 2

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

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

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

Non-Direct Flights:

Southwest Airlines WN857

14:30

Denver (DEN)

19:00

Saint Louis (STL) 2

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

Mon
-

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun

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

Non-Direct Flights:

Southwest Airlines WN910

14:40

Denver (DEN)

18:55

Saint Louis (STL) 2

Effective 2026-03-08 through 2026-04-05

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 3:15, 1-stop
Boeing 737-700 (Scimitar Winglets)

Non-Direct Flights:

Southwest Airlines WN1264

12:50

Denver (DEN)

17:10

Saint Louis (STL) 2

Operates only on 2026-05-24

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 3:20, 1-stop
Boeing 737-800 (73H)

Non-Direct Flights:

Southwest Airlines WN1871

14:00

Denver (DEN)

18:55

Saint Louis (STL) 2

Effective 2026-03-05 through 2026-04-06

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 3:55, 1-stop
Boeing 737-700 (Scimitar Winglets)

Non-Direct Flights:

Southwest Airlines WN2352

07:50

Denver (DEN)

12:10

Saint Louis (STL) 2

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

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 3:20, 1-stop
Boeing 737-700 (Scimitar Winglets)

Non-Direct Flights:

Southwest Airlines WN3012

14:40

Denver (DEN)

18:55

Saint Louis (STL) 2

Effective 2026-03-05 through 2026-04-06

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 3:15, 1-stop
Boeing 737-700 (Scimitar Winglets)

Non-Direct Flights:

Southwest Airlines WN3643

14:30

Denver (DEN)

18:45

Saint Louis (STL) 2

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

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 3:15, 1-stop
Boeing 737-700 (Scimitar Winglets)

Non-Direct Flights:

Southwest Airlines WN3643

14:30

Denver (DEN)

18:45

Saint Louis (STL) 2

Operates only on 2026-05-31

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 3:15, 1-stop
Boeing 737-700 (Scimitar Winglets)

Non-Direct Flights:

Southwest Airlines WN417

16:40

Denver (DEN)

01:45(+1)

Saint Louis (STL) 2

Valid until 2026-01-03

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 8:05, 2-stop
Boeing 737-800 (73H)
The flight arrives 1 day after departure.

Non-Direct Flights:

Southwest Airlines WN1083

07:15

Denver (DEN)

15:20

Saint Louis (STL) 2

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

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 7:05, 2-stop
Boeing 737-700 (Scimitar Winglets)

Non-Direct Flights:

Southwest Airlines WN2220

09:40

Denver (DEN)

18:15

Saint Louis (STL) 2

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

Mon
-

Tue
-

Wed
-

Thu
-

Fri

Sat
-

Sun

Duration: 7:35, 2-stop
Boeing 737-700 (Scimitar Winglets)

Non-Direct Flights:

Southwest Airlines WN2309

13:05

Denver (DEN)

20:50

Saint Louis (STL) 2

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

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 6:45, 2-stop
Boeing 737-700 (Scimitar Winglets)

Direct Codeshare Flights:

Air Canada AC4878

13:30

Denver (DEN)

16:26

Saint Louis (STL) 1

Effective from 2026-05-21

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by United Airlines. (UA 1315)

Duration: 1:56, non-stop
Airbus A319 (319)

Direct Codeshare Flights:

Air Canada AC4878

13:45

Denver (DEN)

16:49

Saint Louis (STL) 1

Effective 2026-03-08 through 2026-03-25

Mon

Tue
-

Wed

Thu
-

Fri
-

Sat
-

Sun

Codeshare flight, operated by United Airlines. (UA 1315)

Duration: 2:04, non-stop
Boeing 737-900 (739)

Direct Codeshare Flights:

Air Canada AC4878

13:45

Denver (DEN)

16:52

Saint Louis (STL) 1

Effective 2026-03-29 through 2026-04-29

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by United Airlines. (UA 1315)

Duration: 2:07, non-stop
Airbus A319 (319)

Direct Codeshare Flights:

Air Canada AC4878

13:48

Denver (DEN)

16:55

Saint Louis (STL) 1

Effective 2026-04-30 through 2026-05-20

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by United Airlines. (UA 1315)

Duration: 2:07, non-stop
Boeing 737-800 (738)

Direct Codeshare Flights:

Air Canada AC4878

13:52

Denver (DEN)

16:56

Saint Louis (STL) 1

Effective 2026-03-05 through 2026-03-26

Mon
-

Tue
-

Wed
-

Thu

Fri
-

Sat
-

Sun
-

Codeshare flight, operated by United Airlines. (UA 1315)

Duration: 2:04, non-stop
Boeing 737-900 (739)

Direct Codeshare Flights:

Air Canada AC4878

13:53

Denver (DEN)

16:55

Saint Louis (STL) 1

Effective 2026-01-07 through 2026-01-18

Mon
-

Tue
-

Wed

Thu

Fri

Sat
-

Sun

Codeshare flight, operated by United Airlines. (UA 1315)

Duration: 2:02, non-stop
Boeing 737-800 (738)

Direct Codeshare Flights:

Air Canada AC4878

13:53

Denver (DEN)

16:55

Saint Louis (STL) 1

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

Mon

Tue
-

Wed

Thu

Fri

Sat
-

Sun

Codeshare flight, operated by United Airlines. (UA 1315)

Duration: 2:02, non-stop
Boeing 737-800 (738)

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A domestic route departing from the Denver airport (DEN) and arriving at Saint Louis airport (STL).
The flight distance is 767 miles, or 1235 km.
The timezone of the departure airport is UTC-7 , 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 1:56 and 2:20.

Return (STL-DEN) flights

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