🇺🇸 STL
St Louis
769 mi
DEN 🇺🇸
Denver

St Louis to Denver Flights

St. Louis Lambert International Airport Denver International Airport 4 airlines

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The St Louis to Denver route connects St. Louis Lambert International Airport (STL) in US with Denver International Airport (DEN) in US. This short-haul flight covers approximately 769 miles (1238 km) with a typical flight time of 2h 3m. This route is served by 4 airlines: Southwest, United, SkyWest and others. AirportRoutes has tracked 30 unique flight numbers on this route.

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Departure Airport

St. Louis Lambert International Airport

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

Destination Airport

Denver International Airport

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

4

Operators

30

Tracked Flights

769

Miles

2h 3m

Flight Duration

Route Map

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

Operating Airlines

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

Flight Schedule Pattern

Day Flights Observed Frequency Activity
Monday 22 19%
Tuesday 15 13%
Wednesday 12 10%
Thursday 23 20%
Friday 19 16%
Saturday 10 9%
Sunday 16 14%

Pattern Analysis

30 Tracked Flights:
Data Points: 117
API observations used to build this analysis
Weekdays: 91 flights
Weekend: 26 flights
Business Route More active on weekdays

All Flight Routes

4 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
A20N 20:08 8:08 PM (Representative)
M T W T F S S
Jul 2, 2026 Active
SkyWest
SKW / OO
E170 05:15 5:15 AM (Representative)
M T W T F S S
Jul 2, 2026 Active
Southwest
SWA / WN
B738 15:00 3:00 PM (Representative)
M T W T F S S
Jul 2, 2026 Active
United
UAL / UA
B738 05:10 5:10 AM (Representative)
M T W T F S S
Jul 2, 2026 Active
Total Routes: 4
Active Routes: 4
Unique Airlines: 4
Aircraft Types: 4

Spotted Departure Times

Departure Time Operator ICAO IATA
05:10 5:10 AM United UAL UA
05:15 5:15 AM SkyWest SKW OO
15:00 3:00 PM Southwest SWA WN
20:08 8:08 PM Frontier FFT F9

Time Information

Times are shown in the departure airport's local timezone (KSTL - America/Chicago).

Total Departure Times: 4
Time Range:
05:10 - 20:08
These are typical departure times observed from actual flights. Times may vary by season and schedule changes.