Denver, CO to St. Louis, MO flights from $46

Flights starting at $46. Choose between Frontier Airlines, United Airlines, or Delta Air Lines to find the best price.

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Cheapest one-way trip

$46

Cheapest nonstop round-trip

$46

Cheapest round-trip

$66

Average round-trip

$203

Nonstop flights in December

$46 – $645

Round trips

Denver DENSt. Louis STL

Frontier Airlines

$66
Denver DENSt. Louis STL

Frontier Airlines

$89

Updated:

768 miles
Distance
Duration
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Travelers usually depart from Denver International, Denver Union Station, Centennial Airport, or Rocky Mountain Metropolitan Airport when they travel from Denver to St. Louis. Book your trip to arrive at St. Louis Lambert International, or St. Louis Union Station. The distance between Denver and St. Louis is 1236 km. The most popular airlines for this route are Frontier Airlines, United Airlines, Delta Air Lines, American Airlines, and Spirit Airlines. Denver and St. Louis have 183 direct flights per week.

Weekly direct flights

MondaysTuesdaysWednesdaysThursdaysFridaysSaturdaysSundays
Direct flights5453555
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 Denver to St. Louis

NameCarrier codeIATA CodePassport needed during bookingOnline check-in available
Frontier AirlinesFFTF9NoOpens 24 days before flight
Closes 1 hours before flight
United AirlinesUALUAYesNo
Delta Air LinesDALDLYesOpens 24 days before flight
Closes 1 hours before flight
American AirlinesAALAAYesNo
Spirit AirlinesNKSNKNoOpens 24 days before flight
Closes 1 hours before flight
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 Denver to St. Louis?
A one-way nonstop (direct) flight between Denver and St. Louis takes around 2.0 hours.
What is the flight distance between Denver and St. Louis?
The flight distance between Denver and St. Louis is 1236 km.
What airlines offer nonstop (direct) flights between Denver and St. Louis?
Several carriers operate flights between Denver and St. Louis. Airlines offering nonstop (direct) flights include Frontier Airlines, United Airlines.
What are the most popular routes to and from Denver?
Travelers frequently search for route combinations, such as Denver and Las Vegas, Los Angeles, Chicago, Minneapolis, Dallas, Washington, D.C., Orlando, Phoenix, San Francisco, Houston, San Diego, Austin, Atlanta, Paris, Philadelphia, New York, Miami, London, Seattle, Tampa.
What are the most popular routes to and from St. Louis?
Travelers frequently search for route combinations, such as St. Louis and Los Angeles, Las Vegas, Atlanta, San Francisco, Orlando, Minneapolis, San Diego, Phoenix, Sacramento, Seattle, Houston, New York, Fort Lauderdale, Washington, D.C., Salt Lake City, San Jose, Oakland, Portland, Fresno, London.
Which airports are there in Denver?
Denver is mainly served by Denver International. But there are other airports nearby, including Centennial Airport, Rocky Mountain Metropolitan Airport.
What airports are near Denver?
The main airport in Denver is Denver International. It is also served by Colorado Springs, Laramie Regional, Cheyenne Regional, Eagle County Regional, Pueblo Memorial.
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, MidAmerica St. Louis, Cape Girardeau Regional, Evansville Regional, Waynesville-St. Robert Regional, Williamson County Regional, Quincy Regional, Barkley Regional.
What buses and trains depart from Denver?
A number of bus and train companies depart from Denver, including Amtrak train, Greyhound.
Is it possible to combine flights, buses, and trains in one itinerary when traveling between Denver and St. Louis?
What is Virtual Interlining and how do I use it?
Which airlines fly between Denver and St. Louis?
When's the best time to travel between Denver and St. Louis?
What flights operate between Denver and St. Louis?
How many airports are there near Denver?
How many airports are there near St. Louis?
Is it possible to reach Denver by bus or train?
What time do nonstop (direct) flights between Denver and St. Louis depart?
What time do nonstop (direct) flights between Denver and St. Louis arrive?
What time do flights between Denver and St. Louis depart?
What time do flights between Denver and St. Louis 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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