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Cheap flight deals from St. Louis to Denver Starting at MYR 79

We've found these cheap flights for you. You can book one-way or round-trip flight tickets.

  • One way
  • Round-trip
      • Cheapest nonstop
        STL07:03 pm
        2h 28m
        Nonstop
        DEN08:31 pm
        Wed, Mar 12|St. Louis - Denver|Frontier Airlines
        MYR 79MYR 169
        53% OFF
        53% OFF
        MYR 169MYR 79

        Choose Frontier Airlines flights from St. Louis to Denver. The one-way direct flight with Frontier Airlines departs from St.Louis Lambert International Airport on Wed, Mar 12, arriving at Denver International Airport. One-way Prices start from MYR 79 including taxes and charges.

      • STL07:04 pm
        2h 28m
        Nonstop
        DEN08:32 pm
        Sat, Mar 1|St. Louis - Denver|Frontier Airlines
        MYR 86MYR 169
        49% OFF
        49% OFF
        MYR 169MYR 86

        Choose Frontier Airlines flights from St. Louis to Denver. The one-way direct flight with Frontier Airlines departs from St.Louis Lambert International Airport on Sat, Mar 1, arriving at Denver International Airport. One-way Prices start from MYR 86 including taxes and charges.

      • STL06:51 pm
        2h 31m
        Nonstop
        DEN08:22 pm
        Mon, Apr 7|St. Louis - Denver|Frontier Airlines
        MYR 116MYR 169
        31% OFF
        31% OFF
        MYR 169MYR 116

        Choose Frontier Airlines flights from St. Louis to Denver. The one-way direct flight with Frontier Airlines departs from St.Louis Lambert International Airport on Mon, Apr 7, arriving at Denver International Airport. One-way Prices start from MYR 116 including taxes and charges.

      • STL07:04 pm
        2h 28m
        Nonstop
        DEN08:32 pm
        Wed, Feb 26|St. Louis - Denver|Frontier Airlines
        MYR 120
        MYR 120

        Choose Frontier Airlines flights from St. Louis to Denver. The one-way direct flight with Frontier Airlines departs from St.Louis Lambert International Airport on Wed, Feb 26, arriving at Denver International Airport. One-way Prices start from MYR 120 including taxes and charges.

      • STL04:07 pm
        2h 34m
        Nonstop
        DEN05:41 pm
        Thu, May 15|St. Louis - Denver|Frontier Airlines
        MYR 123
        MYR 123

        Choose Frontier Airlines flights from St. Louis to Denver. The one-way direct flight with Frontier Airlines departs from St.Louis Lambert International Airport on Thu, May 15, arriving at Denver International Airport. One-way Prices start from MYR 123 including taxes and charges.

      • STL07:04 pm
        2h 28m
        Nonstop
        DEN08:32 pm
        Wed, Mar 5|St. Louis - Denver|Frontier Airlines
        MYR 132
        MYR 132

        Choose Frontier Airlines flights from St. Louis to Denver. The one-way direct flight with Frontier Airlines departs from St.Louis Lambert International Airport on Wed, Mar 5, arriving at Denver International Airport. One-way Prices start from MYR 132 including taxes and charges.

      • STL07:04 pm
        2h 28m
        Nonstop
        DEN08:32 pm
        Mon, Feb 24|St. Louis - Denver|Frontier Airlines
        MYR 134
        MYR 134

        Choose Frontier Airlines flights from St. Louis to Denver. The one-way direct flight with Frontier Airlines departs from St.Louis Lambert International Airport on Mon, Feb 24, arriving at Denver International Airport. One-way Prices start from MYR 134 including taxes and charges.

      • STL06:51 pm
        2h 31m
        Nonstop
        DEN08:22 pm
        Wed, Apr 16|St. Louis - Denver|Frontier Airlines
        MYR 137
        MYR 137

        Choose Frontier Airlines flights from St. Louis to Denver. The one-way direct flight with Frontier Airlines departs from St.Louis Lambert International Airport on Wed, Apr 16, arriving at Denver International Airport. One-way Prices start from MYR 137 including taxes and charges.

      • STL06:51 pm
        2h 31m
        Nonstop
        DEN08:22 pm
        Sat, Apr 5|St. Louis - Denver|Frontier Airlines
        MYR 146
        MYR 146

        Choose Frontier Airlines flights from St. Louis to Denver. The one-way direct flight with Frontier Airlines departs from St.Louis Lambert International Airport on Sat, Apr 5, arriving at Denver International Airport. One-way Prices start from MYR 146 including taxes and charges.

      • STL06:51 pm
        2h 31m
        Nonstop
        DEN08:22 pm
        Sat, Apr 12|St. Louis - Denver|Frontier Airlines
        MYR 146
        MYR 146

        Choose Frontier Airlines flights from St. Louis to Denver. The one-way direct flight with Frontier Airlines departs from St.Louis Lambert International Airport on Sat, Apr 12, arriving at Denver International Airport. One-way Prices start from MYR 146 including taxes and charges.

      • STL01:00 pm
        3h 5m
        Nonstop
        DEN02:00 pm
        Thu, Feb 27|St. Louis - Denver|Frontier Airlines
        Find More Flights
        Find More Flights

Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.

St. Louis to Denver Flight Time

Flight info.
Departure
Arrival
Weekly Schedule

  1. F93641

    Frontier Airlines

    01:06 pm

    STL

    3.8h

    02:51 pm

    LAS

    SMTW-F-
    Search

  2. F91994

    Frontier Airlines

    12:59 am

    LAS

    2.0h

    03:59 am

    DEN

    SMTWTFS

  3. F92630

    Frontier Airlines

    05:47 pm

    STL

    2.5h

    09:19 pm

    MCO

    S------
    Search

  4. F91733

    Frontier Airlines

    11:51 am

    MCO

    4.3h

    02:10 pm

    DEN

    SMTWTFS

  5. F94567

    Frontier Airlines

    06:58 pm

    STL

    2.5h

    Nonstop

    08:29 pm

    DEN

    S-T-TF-
    Search
Find more flights and airlines

When is the cheapest time to fly from St. Louis to Denver?

We monitor flight fares to help you find the best deals effortlessly

Displayed prices are calculated based on the cheapest average weekly prices of the corresponding route on Trip.com.

Frequently Asked Questions

  • When are flight tickets from St. Louis (STL) to Denver (DEN) the cheapest?

    Airlines adjust prices for flights from St. Louis to Denver based on the departure date and time of your selection. By analyzing data from all airlines, we've discovered that on Trip.com, you can find the lowest flight prices on Tuesdays, Wednesdays, and Saturdays.

  • How much do flights from St. Louis (STL) to Denver (DEN) cost?

    According to Trip.com's data, the lowest price is around MYR 913.

  • How long does it take to fly from St. Louis (STL) to Denver (DEN) and what is the distance?

    It takes around 5 hours 41 minutes to fly from St. Louis (STL) to Denver (DEN).

  • What are the most popular airlines that fly from St. Louis (STL) to Denver (DEN)?

    Airlines with flights from St. Louis (STL) to Denver (DEN): Southwest Airlines and United Airlines.

How to find a cheap flight from St. Louis to Denver

Wait until the last minute and flight costs are often sky-high. Plan ahead, book the right way, and your savings can soar. We have loads of saving tips to help you find a cheap flight from St. Louis to Denver. Book your flights at the right time and save more.
1
Book Early
Once prices are gone, they're gone. Lock in deals while you can!
2
Compare Flight Prices
Compare prices on travel agency and airline websites.
3
Look Out for Deals
Check airline and travel agency websites for latest flight deals
4
Check One-way Fares
Buying two cheap one-way flights can sometimes be a better deal than a round-trip.
5
Try Different Dates
Flying during the week, early in the morning, or late at night can help save money.
6
Use the Trip.com App
Save up to £10 per person when booking your flights on Trip.com

Flight Info | St. Louis to Denver

Cheapest nonstop flight priceMYR 79
Cheapest round-trip ticket priceMYR 170
Off-season for travelMarch
Peak season for travelNovember
Flight distance1,253.6 km
Average flight time5 hours 41 minutes
Popular airlineAmerican Airlines

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