Airlines with flights from Saint Louis to Denver

There are five airlines with scheduled flights between STL and DEN. Southwest, United and Frontier has non-stop flights from Saint Louis Airport to Denver International and the flight time is 2 hours and 20 minutes.

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Schedules

Southwest Airlines

Non-stop with Southwest Airlines

  • Total flight time: 2 hours and 20 minutes
  • Low-cost airline
  • Denver is a Southwest Airlines focus city (Operating base).
  • 49 flights per week
  • Boeing 737-800 (winglets) Passenger/BBJ2
    Boeing 737MAX 8 Passenger
    Boeing 737-700 Passenger (Scimitar Winglets)
STL
Direct
DEN
 
Flight
Mon
Jun 15
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Jun 16
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Jun 17
Thu
Jun 18
Fri
Jun 19
Sat
Jun 20
Sun
Jun 21
WN3909
05:35
06:00
06:00
05:35
05:35
05:45
05:45
WN3910
09:00
08:25
08:25
09:00
09:00
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08:25
WN4079
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09:40
WN296
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09:45
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WN4312
11:30
11:20
11:20
11:30
11:30
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12:50
WN1225
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----
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----
----
13:50
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WN824
13:55
17:20
17:20
13:55
13:55
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14:15
WN5067
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15:00
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WN3912
16:00
16:00
16:00
16:00
16:00
16:45
15:45
WN3913
18:40
18:40
18:40
18:40
18:40
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17:35
WN4176
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20:55
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WN3914
22:50
21:15
21:15
22:35
22:35
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WN4243
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----
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21:45
SHOW RETURN SCHEDULE
CHECK PRICES FOR STL - DEN

The timetable & schedule information was updated at 2026-04-21

United Airlines

Non-stop with United Airlines

  • Total flight time: 2 hours and 24 minutes
  • Denver is a United Airlines hub.
  • 29 flights per week
  • Boeing 737MAX 9 Passenger
    Boeing 737-800 Passenger
    Airbus A319
    Boeing 737-900 Passenger
  • Business and first class available
STL
Direct
DEN
 
Flight
Mon
Jun 15
Tue
Jun 16
Wed
Jun 17
Thu
Jun 18
Fri
Jun 19
Sat
Jun 20
Sun
Jun 21
UA362
05:10
05:10
05:10
05:10
05:10
05:10
05:10
UA2459
09:06
09:06
09:06
09:06
09:06
09:06
09:06
UA1380
13:38
13:38
13:38
13:38
13:38
13:38
13:38
UA1483
16:52
16:48
16:48
16:48
16:48
16:45
16:48
SHOW RETURN SCHEDULE
CHECK PRICES FOR STL - DEN

The timetable & schedule information was updated at 2026-04-21

Frontier Airlines

Non-stop with Frontier Airlines

  • Total flight time: 2 hours and 36 minutes
  • Low-cost airline
  • Denver is a Frontier Airlines focus city (Operating base).
  • 7 flights per week
  • Airbus A320neo
STL
Direct
DEN
 
Flight
Mon
Jun 15
Tue
Jun 16
Wed
Jun 17
Thu
Jun 18
Fri
Jun 19
Sat
Jun 20
Sun
Jun 21
F94567
19:38
20:08
20:08
19:38
19:38
19:38
19:38
SHOW RETURN SCHEDULE
CHECK PRICES FOR STL - DEN

The timetable & schedule information was updated at 2026-04-21

Southwest Airlines

Via Kansas City with Southwest Airlines

  • Total flight time: 3h 40m - 6h 05m.
  • Low-cost airline
  • Denver is a Southwest Airlines focus city (Operating base).
  • 77 flights per week
  • Boeing 737-800 (winglets) Passenger/BBJ2
    Boeing 737MAX 8 Passenger
    Boeing 737-700 Passenger (Scimitar Winglets)
STL
 
Via MCI
 
DEN
 
Flight
Mon
Jun 15
Tue
Jun 16
Wed
Jun 17
Thu
Jun 18
Fri
Jun 19
Sat
Jun 20
Sun
Jun 21
WN3943
WN2548
08:10
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08:10
08:10
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WN25
WN3169
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08:35
08:35
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WN3943
WN3586
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10:15
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WN762
WN2549
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14:10
14:10
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WN103
WN3570
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16:20
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WN3944
WN3570
16:45
----
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16:45
16:45
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----
SHOW RETURN SCHEDULE
CHECK PRICES FOR STL - DEN

The timetable & schedule information was updated at 2026-04-21

Southwest Airlines

Via Omaha with Southwest Airlines

  • Total flight time: 3h 45m - 5h 55m.
  • Low-cost airline
  • Denver is a Southwest Airlines focus city (Operating base).
  • 28 flights per week
  • Boeing 737-800 (winglets) Passenger/BBJ2
    Boeing 737MAX 8 Passenger
    Boeing 737-700 Passenger (Scimitar Winglets)
STL
 
Via OMA
 
DEN
 
Flight
Mon
Jun 15
Tue
Jun 16
Wed
Jun 17
Thu
Jun 18
Fri
Jun 19
Sat
Jun 20
Sun
Jun 21
WN4318
WN2060
08:10
08:35
08:35
08:10
08:10
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----
WN1080
WN1410
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----
----
----
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10:15
----
SHOW RETURN SCHEDULE
CHECK PRICES FOR STL - DEN

The timetable & schedule information was updated at 2026-04-21

Southwest Airlines

Via Minneapolis with Southwest Airlines

  • Total flight time: 4h 10m - 7h 45m.
  • Low-cost airline
  • Denver is a Southwest Airlines focus city (Operating base).
  • 33 flights per week
  • Boeing 737-800 (winglets) Passenger/BBJ2
    Boeing 737MAX 8 Passenger
    Boeing 737-700 Passenger (Scimitar Winglets)
STL
 
Via MSP
 
DEN
 
Flight
Mon
Jun 15
Tue
Jun 16
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Jun 17
Thu
Jun 18
Fri
Jun 19
Sat
Jun 20
Sun
Jun 21
WN3961
WN4346
08:15
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08:15
08:15
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08:25
WN353
WN4346
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08:55
08:55
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WN4565
WN2967
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10:25
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WN2832
WN3063
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13:25
SHOW RETURN SCHEDULE
CHECK PRICES FOR STL - DEN

The timetable & schedule information was updated at 2026-04-21

Delta Air Lines

Via Minneapolis with Delta Air Lines

  • Total flight time: 4h 17m - 6h 45m.
  • Sky Team Alliance
  • 122 flights per week
STL
 
Via MSP
 
DEN
 
Flight
Mon
Jun 15
Tue
Jun 16
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Jun 17
Thu
Jun 18
Fri
Jun 19
Sat
Jun 20
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Jun 21
DL1597
DL2849
06:21
06:21
06:21
06:21
06:21
06:21
06:21
DL5325
DL2927
08:49
08:49
08:49
08:49
08:49
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08:49
DL3188
DL1025
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11:18
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DL5078
DL1025
11:18
11:18
11:18
11:18
11:18
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11:18
DL4167
DL2931
15:57
15:57
15:57
15:57
15:57
15:57
15:57
SHOW RETURN SCHEDULE
CHECK PRICES FOR STL - DEN

The timetable & schedule information was updated at 2026-04-21

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Flight data on this page was last updated on 2026-05-25
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