Direct flights from Saint Louis to Denver
All flights from STL to DEN non-stop. There are direct flights from Saint Louis Airport (STL), Missouri, USA to Denver International (DEN), Colorado, USA with Southwest Airlines, United Airlines and Frontier Airlines. 74 weekly departures are currently scheduled on this route. Departure times range from 05:10 to 22:50 depending on the schedule period. The flight distance is 772 miles (1242 km). Flight time ranges from 2 hours and 15 minutes to 2 hours and 48 minutes.
Saint Louis
, USA
Airlines with non-stop routes:
Southwest Airlines
United Airlines
Frontier Airlines
Flight schedule from Saint Louis to Denver with Southwest Airlines
This is a weekly direct flight schedule for Southwest Airlines. Use the arrows or click on the date to change week. Click on any flight departure time to show more information and check availability.
Flight
The timetable & schedule information was updated at 2026-08-31
Flight schedule from Saint Louis to Denver with United Airlines
This is a weekly direct flight schedule for United Airlines. Use the arrows or click on the date to change week. Click on any flight departure time to show more information and check availability.
Flight
The timetable & schedule information was updated at 2026-08-31
Flight schedule from Saint Louis to Denver with Frontier Airlines
This is a weekly direct flight schedule for Frontier Airlines. Use the arrows or click on the date to change week. Click on any flight departure time to show more information and check availability.
Flight
The timetable & schedule information was updated at 2026-08-31
Saint Louis to Denver scheduled departures
Select a date to see every published non-stop departure between STL and DEN.
STL - DEN route facts
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Distance772 miles (1242 km)
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Flight time2 hours and 15 minutes to 2 hours and 48 minutes
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Airlines Southwest United Frontier
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Airline alliancesLow-cost carrier Star Alliance
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CabinsEconomy Business First
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Hub airportsUnited Airlines: DEN
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Departure terminalsSouthwest Airlines: Terminal 2United Airlines: Terminal 1Frontier Airlines: Terminal 1
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AircraftSouthwest Airlines: Boeing 737MAX 8 Passenger, Boeing 737-800 (winglets) Passenger/BBJ2 and Boeing 737-700 Passenger (Scimitar Winglets)United Airlines: Embraer 175 (Enhanced Winglets), Boeing 737-900 Passenger, Airbus A319, Boeing 737-800 Passenger, Airbus A320, Boeing 737MAX 9 Passenger and Boeing 737MAX 8 PassengerFrontier Airlines: Airbus A320neo, Airbus A321neo and Airbus A320
