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Direct flights from St Louis to Denver

Did you mean Flights from Denver to St Louis?

Flightmap/Flights from STL/STL to DEN

St Louis

United States

STL

Lambert St Louis International Airport

Denver

United States

DEN

Denver International Airport

Route
Nonstop service available
Distance
768 miles
Marketing airlines
5 airlines
Aircraft
12 aircraft types
Dates
Oct 19, 2026 – Oct 15, 2027

Observed award fares

A sample of one-way prices for one traveler from Roame’s fare cache. Points, fees, and seats describe the same observation. Availability can change; confirm with the loyalty program before transferring points.

Departure window: 2026-10-23 – 2026-11-21.

No recent fares appear in this limited preview. This does not mean the route is sold out. Use the search controls to check other dates and routes.

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Explore these airports and cities

  • Flights from STL
  • Flights to DEN

St Louis to Denver route overview

Lambert St Louis International Airport (STL) serves St Louis; Denver International Airport (DEN) serves Denver.

The airports are 768 miles apart by great-circle distance.

Roame's current schedule feed shows nonstop service from STL to DEN.

Marketing airlines listed in the current schedule, including codeshare sellers, are Air Canada (AC), Frontier Airlines (F9), United Airlines (UA), Southwest Airlines (WN) and Volaris (Y4). This list does not identify the operating airline for each flight; check the flight details before booking.

Published schedule dates span Oct 19, 2026 – Oct 15, 2027.

Marketing airlines on the St Louis to Denver route

These are marketing airlines, including codeshare sellers. This list does not identify the operating airline for each flight; check the flight details before booking.

  • Air Canada (AC)Codeshare only
  • Volaris (Y4)Codeshare only

Airline alliance affiliations represented: Star Alliance

Aircraft flying from STL to DEN

Frequently asked questions

Which airports serve the St Louis to Denver route?

Lambert St Louis International Airport (STL) is the origin airport and Denver International Airport (DEN) is the destination airport.

How far is Denver from St Louis?

STL and DEN are approximately 768 miles apart by great-circle distance.

Are there direct flights from STL to DEN?

Yes. Roame's current schedule feed shows nonstop service from STL to DEN.

Which airlines market flights from STL to DEN?

Marketing airlines listed in the current schedule, including codeshare sellers, are Air Canada (AC), Frontier Airlines (F9), United Airlines (UA), Southwest Airlines (WN) and Volaris (Y4). This list does not identify the operating airline for each flight; check the flight details before booking.

Which aircraft fly from STL to DEN?

Aircraft listed in the current schedule include Airbus A319 (319), Airbus A320 (320), Airbus A321 (321), Airbus A320neo (32N), Airbus A321neo (32Q), Boeing 737-800 (738), Boeing 737-900 / Boeing 737-900ER (739), Boeing 737-800 Winglets (73H), Boeing 737 MAX 8 (7M8), 7S7, Embraer 175 (long wing) (E7W) and JET.

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