Cheap flights from St. Louis to Denver

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Travelers usually depart from St. Louis Lambert International, or St. Louis Union Station when they travel from St. Louis to Denver. Book your trip to arrive at Denver International, Denver Union Station, Denver Greyhound station, Denver, CO - Federal Center Station, or Denver, CO - Colorado Park & Ride. The distance between St. Louis and Denver is 1236 km. The most popular airlines for this route are Southwest Airlines, Delta Air Lines, Frontier Airlines, United Airlines, and American Airlines. St. Louis and Denver have 195 direct flights per week.

Weekly flights

MondaysTuesdaysWednesdaysThursdaysFridaysSaturdaysSundays
Number of flights32384510-3337

Fly direct with

Frontier Airlines on Mondays, Thursdays, Fridays, and Sundays.

Southwest Airlines on Mondays, Tuesdays, Wednesdays, Thursdays, Fridays, Saturdays, and Sundays.

United Airlines on Mondays, Tuesdays, Wednesdays, Thursdays, Fridays, Saturdays, and Sundays.

Check-in for a flight from St. Louis to Denver

NameCarrier codeIATA CodePassport needed during bookingAirport check-in closesOnline check-in available
Southwest AirlinesSWAWNNoUnknownNo
Delta Air LinesDALDLYesUnknownNo
Frontier AirlinesFFTF9NoUnknownNo
United AirlinesUALUAYesUnknownNo
American AirlinesAALAAYesUnknownNo

Frequently asked questions

How long does it take to travel from St. Louis to Denver?

A one-way nonstop (direct) flight between St. Louis and Denver takes around 2.5 hours.

What is the flight distance between St. Louis and Denver?

The flight distance between St. Louis and Denver is 1236 km.

What airlines offer nonstop (direct) flights between St. Louis and Denver?

Several carriers operate flights between St. Louis and Denver. Airlines offering nonstop (direct) flights include Southwest Airlines, Frontier Airlines, United Airlines.

What are the most popular routes to and from St. Louis?

Travelers frequently search for route combinations, such as St. Louis and Orlando International, McCarran International, Denver International, Hartsfield–Jackson Atlanta International, Luis Muñoz Marín International, Dallas/Fort Worth International, Seattle–Tacoma International, San Diego International, Charlotte Douglas International, Minneapolis–Saint Paul International, Des Moines International.

What are the most popular routes to and from Denver?

Travelers frequently search for route combinations, such as Denver and Orlando International, Miami International, McCarran International, Phoenix Sky Harbor International, George Bush Intercontinental, O Hare International, Baltimore–Washington International, Southwest Florida International, Austin–Bergstrom International, Charlotte Douglas International, Minneapolis–Saint Paul International.

What airports are near St. Louis?

The main airport in St. Louis is St. Louis Lambert International. It is also served by St. Louis Lambert International, General Wayne A. Downing Peoria International, Evansville Regional, MidAmerica St. Louis, Central Illinois Regional, Decatur, Columbia Regional, Abraham Lincoln Capital, Williamson County Regional, Quincy Regional.

What airports are near Denver?

The main airport in Denver is Denver International. It is also served by Colorado Springs, Laramie Regional, Eagle County Regional, Cheyenne Regional, Pueblo Memorial.

What buses and trains depart from St. Louis?

A number of bus and train companies depart from St. Louis, including Burlington Trailways, Amtrak train, Greyhound.

Planning a trip? Thanks to our Virtual Interlining algorithm, we offer billions of route combinations between any A and any B in the world by plane, train, and bus. Find the cheapest routes and best deals for you, as well as the best dates on which to travel.

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