Direct (nonstop) flights from Denver to Saint Louis
3 airlines fly nonstop from Denver International (DEN) to Saint Louis Airport (STL). It's 769 miles (1,237 km), about 2h 5m in the air. Operated by Frontier Airlines, United Airlines, Southwest Airlines.
Frontier Airlines
United Airlines
Southwest Airlines
Route data last updated: May 31, 2026
Airlines with non-stop flights
F9
Frontier Airlines
WN
Southwest Airlines
Alternative Routes
Other ways to fly from Denver to Saint Louis with one stop · direct emits 142 kg CO₂ per passenger
Looking for the return flight?
STL → DEN: Flights from Saint Louis to DenverOther direct flights from Denver
Direct flights from Saint Louis (STL)
Frequently Asked Questions
How long is the direct flight from Denver to Saint Louis?
A nonstop flight from Denver (DEN) to Saint Louis (STL) takes approximately 2 hours and 5 minutes. The distance is 769 miles (1,237 km).
Which airlines fly nonstop from Denver to Saint Louis?
3 airlines: Frontier Airlines, United Airlines, Southwest Airlines.
Is there a nonstop flight from Denver to Saint Louis?
Yes. 3 airlines: Frontier Airlines, United Airlines, Southwest Airlines.
How far is Denver from Saint Louis?
The flight distance from Denver to Saint Louis is 769 miles (1,237 km), measured as the great-circle (shortest air) distance. That's roughly the same distance as London to Madrid.
What type of aircraft flies from Denver to Saint Louis?
At 2h 5m, this route typically uses narrow-body or mid-range jets — Boeing 737 MAX or Airbus A320neo. Varies by airline.
What is the carbon footprint of a flight from Denver to Saint Louis?
Roughly 142 kg CO2 per passenger one-way. That's about the same as driving 710 km.
Is the return flight from Saint Louis to Denver also nonstop?
Yes — nonstop flights run both ways. Flight time may differ slightly due to wind patterns.
When is the cheapest time to fly from Denver to Saint Louis?
Midweek flights (Tue/Wed) outside holiday peaks are usually cheapest. 3-6 weeks ahead is a good window for this route. Use "Check Prices" above to compare.
How early should I arrive at Denver International for this flight?
1.5-2 hours for domestic. Add more time during holidays or busy travel weekends.