Southwest Airlines
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United States
Lambert-Saint Louis International Airport
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United States
Denver International Airport
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Scan through all non-stop flights from St. Louis to Denver. The full flight schedule below gives an overview of all non-stop flights from STL to DEN, which includes the daily timetable of every operating airline for the upcoming 12 months.
Note: for airline-specific flight schedules, please scroll further down.
The Mediterranean regions near Denver are known for their warm, arid summers, where temperatures often go beyond 30°C (86°F). In some inland spots, the heat can climb even higher, sometimes reaching 40°C (104°F) or more. The winters are pleasantly mild, accompanied by some rainfall. This lovely climate, paired with breathtaking landscapes and bright, sunny days attract visitors from around the globe.
Denver is a wonderful place to visit all year long, but spring (March-May) and fall (September-November) are the best seasons to visit. The weather is pleasantly warm during these times, especially since the summers can be quite hot in those regions.
In total there are 3 airlines operating nonstop flights from St. Louis STL to Denver DEN. This section gives an overview of the flight schedules and timetables of every airline with direct flights for this route.
Click an airline below to view their STL DEN flight schedule.
Flights from STL to DEN are operated 28 times a week, with an average of 4 flights per day. Departure times vary between 05:10 - 22:35. The earliest flight departs at 05:10, the last flight departs at 22:35. However, this depends on the date you are flying so please check with the full flight schedule above to see which departure times are available on your preferred date(s) of travel.
You can fly in Economy and Business Class. Premium Economy and First Class are not available on this route (at least not as a non-stop flight).
The fastest direct flight from St. Louis to Denver takes 2 hours and 37 minutes. The flight distance between St. Louis and Denver is 767 miles (or 1,234 km).
There are 2 airports in Denver: Denver International Airport (DEN) and Centennial Airport (APA).
There are 28 flights per week flying from St. Louis to Denver (as of March 2026).
2 hours and 37 minutes is the average flight time from St. Louis to Denver.
The distance from St. Louis to Denver is 767 miles (1,234 kilometers).
Frontier Airlines, Southwest Airlines and United Airlines are flying nonstop from St. Louis to Denver.
Star Alliance is currently the only alliance flying nonstop from St. Louis to Denver.
You can fly non-stop in Economy and Business Class.
Aircraft types that fly from St. Louis to Denver:
The earliest flight departs at 05:10 from St. Louis and arrives at 06:32 at Denver.
The latest flight departs at 22:35 from St. Louis and arrives at 23:55 at Denver.
767 miles (1,234 km) · 2h 37m
06:00
07:30
Southwest Airlines
WN 3852
Southwest Airlines
Boeing 737 MAX 8
Y
W
J
F
06:15
07:40
Southwest Airlines
WN 3852
Southwest Airlines
Boeing 737 MAX 8
Y
W
J
F
06:20
07:45
Southwest Airlines
WN 3852
Southwest Airlines
Boeing 737 MAX 8
Y
W
J
F
06:20
07:45
Southwest Airlines
WN 3852
Southwest Airlines
Boeing 737-800 (winglets)
Y
W
J
F
08:20
09:45
Southwest Airlines
WN 1890
Southwest Airlines
Boeing 757
Y
W
J
F
08:25
09:50
Southwest Airlines
WN 2976
Southwest Airlines
Boeing 737-800 (winglets)
Y
W
J
F
08:54
10:27
United Airlines
Star Alliance
UA 1415
United Airlines
Boeing 737-800
Y
W
J
F
08:54
10:27
United Airlines
Star Alliance
UA 1415
United Airlines
Boeing 737-800
Y
W
J
F
11:30
12:50
Southwest Airlines
WN 3314
Southwest Airlines
Boeing 737 MAX 8
Y
W
J
F
12:10
13:30
Southwest Airlines
WN 3314
Southwest Airlines
Boeing 737-800 (winglets)
Y
W
J
F
14:05
15:30
Southwest Airlines
WN 2483
Southwest Airlines
Boeing 737-800 (winglets)
Y
W
J
F
14:15
15:40
Southwest Airlines
WN 2483
Southwest Airlines
Boeing 737 MAX 8
Y
W
J
F
14:30
15:55
Southwest Airlines
WN 2483
Southwest Airlines
Boeing 737-800 (winglets)
Y
W
J
F
14:40
16:14
United Airlines
Star Alliance
UA 1380
United Airlines
Airbus A319
Y
W
J
F
15:35
17:00
Southwest Airlines
WN 2483
Southwest Airlines
Boeing 737 MAX 8
Y
W
J
F
16:30
18:04
United Airlines
Star Alliance
UA 1236
United Airlines
Airbus A319
Y
W
J
F
17:20
18:45
Southwest Airlines
WN 2976
Southwest Airlines
Boeing 737 MAX 8
Y
W
J
F
17:35
19:00
Southwest Airlines
WN 2359
Southwest Airlines
Boeing 757
Y
W
J
F
18:05
19:39
United Airlines
Star Alliance
UA 1236
United Airlines
Airbus A319
Y
W
J
F
18:05
19:39
United Airlines
Star Alliance
UA 1236
United Airlines
Airbus A319
Y
W
J
F
18:30
19:55
Southwest Airlines
WN 2739
Southwest Airlines
Boeing 757
Y
W
J
F
18:40
20:05
Southwest Airlines
WN 2739
Southwest Airlines
Boeing 737 MAX 8
Y
W
J
F
20:12
21:49
Frontier Airlines
F9 4567
Frontier Airlines
Airbus A321neo
Y
W
J
F
21:00
22:25
Southwest Airlines
WN 2423
Southwest Airlines
Boeing 737 MAX 8
Y
W
J
F
21:35
23:00
Southwest Airlines
WN 2423
Southwest Airlines
Boeing 737-800 (winglets)
Y
W
J
F
21:35
23:00
Southwest Airlines
WN 2423
Southwest Airlines
Boeing 737 MAX 8
Y
W
J
F
21:55
23:20
Southwest Airlines
WN 2423
Southwest Airlines
Boeing 737 MAX 8
Y
W
J
F
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