🇺🇸 DEN
Denver
789 mi
STL 🇺🇸
St Louis

Denver to St Louis Flights

Denver International Airport St. Louis Lambert International Airport 3 airlines

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The Denver to St Louis route connects Denver International Airport (DEN) in US with St. Louis Lambert International Airport (STL) in US. This short-haul flight covers approximately 789 miles (1270 km) with a typical flight time of 1h 31m. This route is served by 3 airlines: Southwest, Frontier, United. AirportRoutes has tracked 22 unique flight numbers on this route.

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Departure Airport

Denver International Airport

ICAO Code:
KDEN
IATA Code:
DEN
City:
🇺🇸 Denver
Country:
US
Elevation:
5431 ft

Destination Airport

St. Louis Lambert International Airport

ICAO Code:
KSTL
IATA Code:
STL
City:
🇺🇸 St Louis
Country:
US
Elevation:
618 ft

3

Operators

22

Tracked Flights

789

Miles

1h 31m

Flight Duration

Route Map

Great Circle
Flight route map from Denver to St Louis
Map data © Mapbox © OpenStreetMap contributors

Operating Airlines

Airline ICAO IATA
Southwest SWA WN
Frontier FFT F9
United UAL UA

Flight Schedule Pattern

Day Flights Observed Frequency Activity
Monday 17 14%
Tuesday 17 14%
Wednesday 27 22%
Thursday 21 18%
Friday 16 13%
Saturday 8 7%
Sunday 14 12%

Pattern Analysis

22 Tracked Flights:
Data Points: 120
API observations used to build this analysis
Weekdays: 98 flights
Weekend: 22 flights
Business Route More active on weekdays

All Flight Routes

3 Routes
Note: This table shows aggregated route data by airline. Each airline may operate multiple daily flights at different times. See the "Spotted Departure Times" section below for all observed departure times.
Airline Flight Numbers Aircraft Type Typical Time Days Active Last Seen Status
Frontier
FFT / F9
A21N 07:05 7:05 AM (Representative)
M T W T F S S
Jun 30, 2026 Active
Southwest
SWA / WN
B38M 05:55 5:55 AM (Representative)
M T W T F S S
Jun 30, 2026 Active
United
UAL / UA
B738 17:50 5:50 PM (Representative)
M T W T F S S
Jun 30, 2026 Active
Total Routes: 3
Active Routes: 3
Unique Airlines: 3
Aircraft Types: 3

Spotted Departure Times

Departure Time Operator ICAO IATA
05:55 5:55 AM Southwest SWA WN
07:05 7:05 AM Frontier FFT F9
17:50 5:50 PM United UAL UA

Time Information

Times are shown in the departure airport's local timezone (UTC).

Total Departure Times: 3
Time Range:
05:55 - 17:50
These are typical departure times observed from actual flights. Times may vary by season and schedule changes.