Cheap flights from St. Louis, MO to Denver, CO

Flights starting at $32. Choose between JetBlue Airways, Frontier Airlines, or American Airlines to find the best price.

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Round trips

St. Louis STLDenver DEN

Frontier Airlines

$131

Updated:

One-way trips

St. Louis STLDenver DEN

Frontier Airlines

$68

Updated:

768 miles
Distance
Duration
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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, Rocky Mountain Metropolitan Airport, or Centennial Airport. The distance between St. Louis and Denver is 1236 km. The most popular airlines for this route are JetBlue Airways, Frontier Airlines, American Airlines, Delta Air Lines, and United Airlines. St. Louis and Denver have 325 direct flights per week.

Weekly direct flights

MondaysTuesdaysWednesdaysThursdaysFridaysSaturdaysSundays
Direct flights4344444
Fly direct with

Frontier Airlines on Mondays, 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 bookingOnline check-in available
JetBlue AirwaysJBUB6YesOpens 24 days before flight
Closes 2 hours before flight
Frontier AirlinesFFTF9NoOpens 24 days before flight
Closes 1 hours before flight
American AirlinesAALAAYesNo
Delta Air LinesDALDLYesOpens 24 days before flight
Closes 1 hours before flight
United AirlinesUALUAYesNo

United States COVID-19 travel restrictions

Your trip summary

Most travelers from St Louis, STL can enter Denver, DEN.

Departure

Additional information
  • Masks are recommended in certain settings

Information is provided as guidance only and accurate at the time of publishing. Always check government websites and airline materials before booking and traveling.

Learn more about COVID-19 restrictions in United States in our dedicated Stories article.

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 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 Las Vegas, Los Angeles, Orlando, Atlanta, Minneapolis, San Diego, San Francisco, London, Phoenix, Seattle, Houston, Sacramento, New York, Cancún, Washington, D.C., Fort Lauderdale, Oakland, Tampa, Paris, Dallas.
What are the most popular routes to and from Denver?
Travelers frequently search for route combinations, such as Denver and Chicago, Dallas, Minneapolis, Los Angeles, Washington, D.C., Houston, Orlando, San Francisco, Atlanta, Las Vegas, Austin, Phoenix, Philadelphia, San Diego, Miami, New York, Tampa, Detroit, Seattle, Salt Lake City.
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, Central Illinois Regional, Cape Girardeau Regional, Waynesville-St. Robert Regional, MidAmerica St. Louis, Barkley Regional, Evansville Regional, Williamson County Regional, Quincy Regional.
What airports are near Denver?
The main airport in Denver is Denver International. It is also served by Pueblo Memorial, Colorado Springs, Eagle County Regional, Laramie Regional, Cheyenne Regional.
Is it possible to combine flights, buses, and trains in one itinerary when traveling between St. Louis and Denver?
Yes, it's possible to combine different modes of transport between St. Louis and Denver thanks to our Virtual Interlining technology. Making use of not only flights but also trains and buses between St. Louis and Denver can give rise to new adventures. Read more about how Virtual Interlining works on Kiwi.com Stories.
What is Virtual Interlining and how do I use it?
Virtual Interlining provides a revolutionary way of traveling. You can combine different modes of transport like flights, trains, and buses into one itinerary. And this often saves money. Thanks to the world's largest carrier database, the Kiwi.com search function enables anyone to mix and match different modes of transport easily.
Which airlines fly between St. Louis and Denver?
When's the best time to travel between St. Louis and Denver?
What flights operate between St. Louis and Denver?
How many airports are there near St. Louis?
How many airports are there near Denver?
What time do nonstop (direct) flights between St. Louis and Denver depart?
What time do nonstop (direct) flights between St. Louis and Denver arrive?
What time do flights between St. Louis and Denver depart?
What time do flights between St. Louis and Denver arrive?

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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