American Airlines flights from Denver to Saint Louis

Recent searches for flights from Denver to Saint Louis

Aug 2026
From$220*
Updated: 8 hours ago
Round tripIEconomy
Sep 2026
From$233*
Updated: 8 hours ago
Round tripIEconomy
Oct 2026
From$233*
Updated: 8 hours ago
Round tripIEconomy
cmp-daily-histogram-bars-legend-min-price-aria-label $220
cmp-daily-histogram-bars-legend-max-price-aria-label $852
Displaying fares for August-2026
  • DEN–STL: cmp-view-offers-disclaimer. Find Offers
    06

    Th

    AUG

  • DEN–STL, 08/07/26 – 08/14/26: From $852
    07

    Fr

  • DEN–STL, 08/08/26 – 08/15/26: From $852
    08

    Sa

  • DEN–STL, 08/09/26 – 08/16/26: From $852
    09

    Su

  • DEN–STL, 08/10/26 – 08/17/26: From $852
    10

    Mo

  • DEN–STL, 08/11/26 – 08/18/26: From $828
    11

    Tu

  • DEN–STL, 08/12/26 – 08/19/26: From $852
    12

    We

  • DEN–STL, 08/13/26 – 08/20/26: From $622
    13

    Th

  • DEN–STL, 08/14/26 – 08/21/26: From $622
    14

    Fr

  • DEN–STL, 08/15/26 – 08/22/26: From $622
    15

    Sa

  • DEN–STL, 08/16/26 – 08/23/26: From $622
    16

    Su

  • DEN–STL, 08/17/26 – 08/24/26: From $622
    17

    Mo

  • DEN–STL, 08/18/26 – 08/25/26: From $622
    18

    Tu

  • DEN–STL, 08/19/26 – 08/26/26: From $622
    19

    We

  • DEN–STL, 08/20/26 – 08/27/26: From $345
    20

    Th

  • DEN–STL, 08/21/26 – 08/28/26: From $386
    21

    Fr

  • DEN–STL, 08/22/26 – 08/29/26: From $345
    22

    Sa

  • DEN–STL, 08/23/26 – 08/30/26: From $427
    23

    Su

  • DEN–STL, 08/24/26 – 08/31/26: From $345
    24

    Mo

  • DEN–STL, 08/25/26 – 09/01/26: From $345
    25

    Tu

  • DEN–STL, 08/26/26 – 08/27/26: From $233
    26

    We

  • DEN–STL, 08/27/26 – 08/31/26: From $233
    27

    Th

  • DEN–STL, 08/28/26 – 09/04/26: From $315
    28

    Fr

  • DEN–STL, 08/29/26 – 09/05/26: From $220
    29

    Sa

  • DEN–STL, 08/30/26 – 09/06/26: From $302
    30

    Su

  • DEN–STL, 08/31/26 – 09/07/26: From $274
    31

    Mo

  • DEN–STL, 09/01/26 – 09/08/26: From $233
    01

    Tu

    SEP

  • DEN–STL, 09/02/26 – 09/09/26: From $233
    02

    We

  • DEN–STL: cmp-view-offers-disclaimer. Find Offers
    03

    Th

  • DEN–STL: cmp-view-offers-disclaimer. Find Offers
    04

    Fr

  • DEN–STL: cmp-view-offers-disclaimer. Find Offers
    05

    Sa

    • range$220-$852

    DisclaimerFares displayed have been collected within the last 24hrs and may no longer be available at time of booking. Modifying this information may result in a different fare. To find the most updated fare, please visit aa.com. Fares listed may be Basic Economy, which class is subject to additional terms and conditions. Additional baggage fees and charges for optional products and services may apply.

    Find deals on Denver to Saint Louis flights

    $
    keyboard_arrow_down

    Denver (DEN)to

    Saint Louis (STL)
    08/29/26 - 09/05/26

    Round trip

    Economy

    from
    $220Fare subject to changes
    Updated: 8 hours ago

    Denver (DEN)to

    Saint Louis (STL)
    10/06/26 - 10/13/26

    Round trip

    Economy

    from
    $233Fare subject to changes
    Updated: 8 hours ago

    Denver (DEN)to

    Saint Louis (STL)
    10/13/26 - 10/20/26

    Round trip

    Economy

    from
    $233Fare subject to changes
    Updated: 8 hours ago

    Denver (DEN)to

    Saint Louis (STL)
    10/14/26 - 10/21/26

    Round trip

    Economy

    from
    $233Fare subject to changes
    Updated: 8 hours ago

    Denver (DEN)to

    Saint Louis (STL)
    10/24/26 - 10/31/26

    Round trip

    Economy

    from
    $233Fare subject to changes
    Updated: 8 hours ago

    Denver (DEN)to

    Saint Louis (STL)
    09/14/26 - 09/21/26

    Round trip

    Economy

    from
    $233Fare subject to changes
    Updated: 8 hours ago

    Denver (DEN)to

    Saint Louis (STL)
    09/15/26 - 09/22/26

    Round trip

    Economy

    from
    $233Fare subject to changes
    Updated: 8 hours ago

    Denver (DEN)to

    Saint Louis (STL)
    09/22/26 - 09/29/26

    Round trip

    Economy

    from
    $233Fare subject to changes
    Updated: 8 hours ago

    *Fares displayed have been collected within the last 24hrs and may no longer be available at time of booking. Some fares listed may include one or more connections that are Basic Economy, which class is subject to additional terms and conditions. Modifying this information may result in a different fare. To find the most updated fare, please visit aa.com. Additional baggage fees and charges for optional products and services may apply.

    Finding cheap flights from Denver to Saint Louis

    Looking for lower fares on your trip from Denver to Saint Louis? Here are a few ways to save.

    • Book early: Booking 1 to 3 months ahead can help you find lower fares
    • Be flexible with dates: Midweek travel, like Tuesdays and Wednesdays, can be more affordable
    • Travel during less busy periods: Flying outside peak travel times can help find lower fares and avoid crowds

    Earn up to $500 back on your next American Airlines flight plus, 30,000 bonus miles. Offers vary elsewhere. Opens another site in a new window that may not meet accessibility guidelines.

    Upgrade your flight with Main Cabin Extra

    Make your trip more comfortable with Main Cabin Extra. Enjoy benefits like:

    • Extra legroom: More space with seats at the front of the Main Cabin or in exit rows.
    • Early boarding: Preferred Group 5 boarding allows easier access to overhead bins.
    • Complimentary drinks: Enjoy beer, wine and spirits on flights with full beverage service.

    Discover how Main Cabin Extra can enhance your trip.

    American Airlines flights from Denver to Saint Louis