Cheap flights from Denver to St. Louis

Flights overview

Useful information for finding cheap flights from Denver to St. Louis and booking your next trip
Cheapest round-trip flights $58
Frontier Nonstop 3 hr Fri, Jan 23 — Mon, Jan 26
The cheapest round-trip flight from Denver to St. Louis is currently $58
Cheapest one-way flight $29
Frontier Nonstop 3 hr Wed, Jan 21
The cheapest one-way flight from Denver to St. Louis is currently $29
Cheapest nonstop flights $93
Frontier Nonstop 3 hr Sat, Dec 13 — Mon, Dec 15
The cheapest nonstop round-trip flight from Denver to St. Louis is currently $93
Last-minute weekend getaway $321
Frontier 1 stop 14 hr Thu, Nov 20 — Sun, Nov 23
The cheapest last-minute weekend getaway from Denver to St. Louis is currently $321
Cheapest business class flights $432
United Nonstop 3 hr Sat, Jan 17 — Mon, Jan 19
The cheapest business class round-trip flight from Denver to St. Louis is currently $432
Fastest flight 2 hr The fastest nonstop flight from Denver to St. Louis takes 2 hr
Nonstop flights Every day There are direct flights on this route every day.

When is the cheapest time to fly?

The cheapest month to fly from Denver to St. Louis is typically January. The most expensive month to fly is typically July.
January
Cheapest
Typical prices: $80–190
July
Most expensive
Typical prices: $180–310

Popular airlines from Denver to St. Louis

  • Southwest
    Nonstop
    from $162
    Typical price: $200–390
    35 weekly nonstop flights
    DEN - STL Every day
    1162 weekly connecting flights
    DEN - STL Every day
  • United
    Nonstop
    from $162
    Typical price: $215–445
    21 weekly nonstop flights
    DEN - STL Every day
    337 weekly connecting flights
    DEN - STL Every day
  • Frontier
    Nonstop
    from $58
    Typical price: $105–305
    7 weekly nonstop flights
    DEN - STL Every day
    39 weekly connecting flights
    DEN - STL Every day
  • American
    from $187
    Typical price: $225–490
    282 weekly connecting flights
    DEN - STL Every day
  • Delta
    from $182
    Typical price: $235–540
    217 weekly connecting flights
    DEN - STL Every day
  • Alaska
    from $322
    Typical price: $460–900
    20 weekly connecting flights
    DEN - STL Every day

Popular airports near Denver

  • Denver International Airport (DEN)
    Denver United States 39 min 19 mi
  • Colorado Springs Airport (COS)
    Colorado Springs United States 1 hr 27 min 66 mi
  • Centennial Airport (APA)
    Denver United States 27 min 14 mi
  • Eagle County Regional Airport (EGE)
    Vail United States 2 hr 19 min 103 mi

Popular airports near St. Louis

  • St. Louis Lambert International Airport (STL)
    St. Louis United States 21 min 12 mi
  • MidAmerica St. Louis Airport (BLV)
    Belleville United States 34 min 20 mi
  • General Wayne A. Downing Peoria International Airport (PIA)
    Peoria United States 2 hr 35 min 143 mi
  • Indianapolis International Airport (IND)
    Indianapolis United States 3 hr 28 min 222 mi

Frequently asked questions about flying from Denver to St. Louis

When are the cheapest days to fly from Denver to St. Louis?
The cheapest flights from Denver to St. Louis are usually in January. Typical ticket prices in January range from $80 to $190.
Which airlines provide the cheapest flights from Denver to St. Louis?
The cheapest round-trip flight from Denver to St. Louis recently found on Google Flights was with Frontier from $58. The cheapest one-way flight was with Frontier from $29.

Some of the cheapest round-trip deals we found with different airlines:
  • The cheapest Southwest flight from Denver to St. Louis is $162, flying from Jan 17 to Jan 19.
  • The cheapest United flight from Denver to St. Louis is $162, flying from Jan 17 to Jan 19.
  • The cheapest Frontier flight from Denver to St. Louis is $58, flying from Jan 23 to Jan 26.
  • The cheapest American flight from Denver to St. Louis is $187, flying from Jan 16 to Jan 19.
  • The cheapest Delta flight from Denver to St. Louis is $182, flying from Jan 10 to Jan 12.
  • The cheapest Alaska flight from Denver to St. Louis is $322, flying from Jan 29 to Feb 1.
What are the cheapest flights from Denver to St. Louis?
The cheapest round-trip flight from Denver to St. Louis starts at $58 from Fri, Jan 23 to Mon, Jan 26. The cheapest one-way flight starts at $29 and departs on Wed, Jan 21.
How long does it take to fly from Denver to St. Louis?
2 hr is the shortest flight time from Denver to St. Louis.
When should you fly to St. Louis, United States?
Apr–Sep is the most popular time to visit, coinciding with hot, humid summer and events like Fair St. Louis, a huge Fourth of July festival at Forest Park, and the Taste of St. Louis food festival (Sep). Weather in winter is cold, with occasional snow.
How do I find cheap dates to fly from Denver to St. Louis?
It's easy to use Google Flights to find the cheapest days to fly from Denver to St. Louis.
Just click the Departure label near the top of the page to open the calendar. Choose a start date and a return date to see how the round-trip fare changes on those specific days.
Adjust the trip type to see one-way fares. The cheapest available flights are highlighted and easy to spot. Once you settle on dates, click the Search button to see flight options and book the deal.

You can also turn on price tracking to get alerts if the price changes for a route or flight.
What is the best airline to fly from Denver to St. Louis?
What counts as the best airline for your flights from Denver to St. Louis really depends on your individual needs. You may have a favorite carrier or a loyalty program you like, but price, convenience, and airports served also come into play. Flexibility and booking terms – Can you change flights if you want to stay longer or get a refund if you have to postpone your trip? – are also factors that help determine which airline is best to fly from Denver to St. Louis.

In terms of nonstop flights, Southwest is the most popular. Southwest offers 35 nonstop flights and 1,162 connecting flights per week. Southwest flies from Denver International Airport (DEN) to St. Louis Lambert International Airport (STL) .

Other popular airlines flying from Denver to St. Louis are:
  • United offers 21 nonstop flights and 337 connecting flights per week. United flies from Denver International Airport (DEN) to St. Louis Lambert International Airport (STL) .
  • Frontier offers 7 nonstop flights and 39 connecting flights per week. Frontier flies from Denver International Airport (DEN) to St. Louis Lambert International Airport (STL) .
  • American offers 282 connecting flights per week. American flies from Denver International Airport (DEN) to St. Louis Lambert International Airport (STL) .
  • Delta offers 217 connecting flights per week. Delta flies from Denver International Airport (DEN) to St. Louis Lambert International Airport (STL) .
  • Alaska offers 20 connecting flights per week. Alaska flies from Denver International Airport (DEN) to St. Louis Lambert International Airport (STL) .
The number of connecting flights refers to distinct flights with at least one stop between Denver and St. Louis.
Which airlines provide the cheapest flights from Denver to St. Louis?
The cheapest round-trip flight from Denver to St. Louis recently found on Google Flights was with Frontier from $58. The cheapest one-way flight was with Frontier from $29.

Some of the cheapest round-trip deals we found with different airlines:
  • The cheapest Southwest flight from Denver to St. Louis is $162, flying from Jan 17 to Jan 19.
  • The cheapest United flight from Denver to St. Louis is $162, flying from Jan 17 to Jan 19.
  • The cheapest Frontier flight from Denver to St. Louis is $58, flying from Jan 23 to Jan 26.
  • The cheapest American flight from Denver to St. Louis is $187, flying from Jan 16 to Jan 19.
  • The cheapest Delta flight from Denver to St. Louis is $182, flying from Jan 10 to Jan 12.
  • The cheapest Alaska flight from Denver to St. Louis is $322, flying from Jan 29 to Feb 1.
Which airlines have direct flights from Denver to St. Louis?
Southwest, United and Frontier fly direct from Denver to St. Louis.
  • There are 35 Southwest direct flights from Denver to St. Louis per week. Flights are available every day.
  • There are 21 United direct flights from Denver to St. Louis per week. Flights are available every day.
  • There are 7 Frontier direct flights from Denver to St. Louis per week. Flights are available every day.
Use the Stops filter while searching for flights, to see only nonstop options in your results.
Which airline provides the cheapest last-minute getaway flight from Denver to St. Louis?
The cheapest last-minute deal between Denver and St. Louis at price $321 is offered by Frontier from Thu, Nov 20 to Sun, Nov 23.
Which airlines have direct flights from Denver to St. Louis?
Southwest, United and Frontier fly direct from Denver to St. Louis.
  • There are 35 Southwest direct flights from Denver to St. Louis per week. Flights are available every day.
  • There are 21 United direct flights from Denver to St. Louis per week. Flights are available every day.
  • There are 7 Frontier direct flights from Denver to St. Louis per week. Flights are available every day.
Use the Stops filter while searching for flights, to see only nonstop options in your results.
When are direct flights from Denver to St. Louis available?
There are direct flights from Denver to St. Louis on a daily basis.
What are the cheapest direct flights from Denver to St. Louis?
The cheapest direct (nonstop) round-trip flights between Denver and St. Louis start at $93 from Sat, Dec 13 to Mon, Dec 15 with Frontier.
How can I find nonstop flights from Denver to St. Louis?
It's easy to find nonstop flights with Google Flights! Once you've searched for flights from Denver to St. Louis, just select the nonstop flights only option in the 'Stops’ filter in the search form and view all available direct flights and their prices.
What are the cheapest business class flights from Denver to St. Louis?
The cheapest business class round-trip flights between Denver and St. Louis start at $432 from Sat, Jan 17 to Mon, Jan 19 with United.
What are the cheapest economy class flights from Denver to St. Louis?
The cheapest economy class round-trip flights between Denver and St. Louis start at $58 from Fri, Jan 23 to Mon, Jan 26.
How can I book business class trips from Denver to St. Louis?
To book business class trips from Denver to St. Louis, look for the default Economy selection at the top, and change it to your desired cabin class such as Premium Economy, Business Class, or First Class. You can then select your departure and arrival dates, consider available options, and book your business travel.

You can also adjust the trip type to view one-way fares.
Are there any last-minute deals from Denver to St. Louis next weekend?
The best last-minute getaway deal for the next weekend between Denver and St. Louis starts at $321 from Thu, Nov 20 to Sun, Nov 23 with Frontier.
Which airline provides the cheapest last-minute getaway flight from Denver to St. Louis?
The cheapest last-minute deal between Denver and St. Louis at price $321 is offered by Frontier from Thu, Nov 20 to Sun, Nov 23.
How can I find last-minute flight deals from Denver to St. Louis?
To find last-minute flight deals from Denver to St. Louis, start by entering the city names, select the desired departure and return dates, and hit the Search button to view flight options.

You can check for last-minute flights for the same day or adjust the trip type to see one-way fares.

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