St. LouisDenverFlight TimeSTL–DEN
St. Louis (St. Louis Lambert International Airport) to Denver (Denver International Airport).
The flight from St. Louis (STL) to Denver (DEN) takes 2h 17m on average, covering about 1,234 miles. Across 4 flights we tracked, the fastest was 1h 54m and the slowest 2h 37m, with Southwest Airlines flying it most often.
Plan this routeAt a glance
| Avg flight time | Distance | Fastest tracked | Airlines |
|---|---|---|---|
| 2h 17m | 1,234 mi | 1h 54m | 2 |
Airlines on this route
Captured airlines for STL to DEN
Our current provider sample includes 12/day from STL to DEN across 3 captured airlines. Captured departure terminal data is available for 2, 1.
- First departure
- 05:10
- Last departure
- 22:35
- Cadence
- ~every 30 min
- Captured departures/day
- 32
| Airline | Captured daily freq. | Aircraft | Departures (local) |
|---|---|---|---|
| Southwest Airlines | 6-7/day | Boeing 737 · Terminal 2 · Seat map | 05:3505:45 |
Aircraft we tracked
Methodology: figures are aggregated from 4 real flights on this route tracked between 2026-06-04 and 2026-06-15, sourced from live flight data. Updated daily as new flights are observed.
Route FAQ
How long is the flight from STL to DEN?
The STL to DEN flight takes 2h 17m on average based on 4 tracked flights.
How far is STL from DEN?
STL to DEN is about 1,234 miles by air.
Which airlines fly from STL to DEN?
Southwest Airlines, United Airlines fly the STL to DEN route in our tracked route data.
What aircraft fly from STL to DEN?
Aircraft observed on STL to DEN include Boeing 737 MAX 8, Boeing 737-800.