American Airlines flights from Saint Louis to Cancun

Recent searches for flights from Saint Louis to Cancun

Sep 2026
From$649*
Updated: 12 hours ago
Round tripIEconomy
Oct 2026
From$388*
Updated: 12 hours ago
Round tripIEconomy
Nov 2026
From$388*
Updated: 12 hours ago
Round tripIEconomy
cmp-daily-histogram-bars-legend-min-price-aria-label $578
cmp-daily-histogram-bars-legend-max-price-aria-label $1.3K
Displaying fares for September-2026
  • STL–CUN: cmp-view-offers-disclaimer. Find Offers
    14

    Mo

    SEP

  • STL–CUN, 09/15/26 – 09/22/26: From $668
    15

    Tu

  • STL–CUN, 09/16/26 – 09/23/26: From $673
    16

    We

  • STL–CUN, 09/17/26 – 09/24/26: From $713
    17

    Th

  • STL–CUN, 09/18/26 – 09/25/26: From $713
    18

    Fr

  • STL–CUN, 09/19/26 – 09/26/26: From $674
    19

    Sa

  • STL–CUN, 09/20/26 – 09/27/26: From $839
    20

    Su

  • STL–CUN, 09/21/26 – 09/28/26: From $744
    21

    Mo

  • STL–CUN, 09/22/26 – 09/29/26: From $668
    22

    Tu

  • STL–CUN, 09/23/26 – 09/30/26: From $704
    23

    We

  • STL–CUN, 09/24/26 – 10/01/26: From $713
    24

    Th

  • STL–CUN, 09/25/26 – 10/02/26: From $713
    25

    Fr

  • STL–CUN, 09/26/26 – 10/03/26: From $674
    26

    Sa

  • STL–CUN, 09/27/26 – 10/04/26: From $718
    27

    Su

  • STL–CUN, 09/28/26 – 10/05/26: From $694
    28

    Mo

  • STL–CUN, 09/29/26 – 10/06/26: From $649
    29

    Tu

  • STL–CUN, 09/30/26 – 10/07/26: From $685
    30

    We

  • STL–CUN, 10/01/26 – 10/08/26: From $803
    01

    Th

    OCT

  • STL–CUN, 10/02/26 – 10/09/26: From $803
    02

    Fr

  • STL–CUN, 10/03/26 – 10/10/26: From $785
    03

    Sa

  • STL–CUN, 10/04/26 – 10/11/26: From $839
    04

    Su

  • STL–CUN, 10/05/26 – 10/12/26: From $1,058
    05

    Mo

  • STL–CUN, 10/06/26 – 10/13/26: From $649
    06

    Tu

  • STL–CUN, 10/07/26 – 10/14/26: From $654
    07

    We

  • STL–CUN, 10/08/26 – 10/15/26: From $719
    08

    Th

  • STL–CUN, 10/09/26 – 10/16/26: From $592
    09

    Fr

  • STL–CUN, 10/10/26 – 10/17/26: From $800
    10

    Sa

  • STL–CUN, 10/11/26 – 10/18/26: From $1,270
    11

    Su

  • STL–CUN, 10/12/26 – 10/19/26: From $578
    12

    Mo

  • STL–CUN, 10/13/26 – 10/20/26: From $603
    13

    Tu

    • range$578-$1,270

    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 Saint Louis to Cancun flights

    $
    keyboard_arrow_down

    Saint Louis (STL)to

    Cancun (CUN)
    12/01/26 - 12/08/26

    Round trip

    Economy

    from
    $388Fare subject to changes
    Updated: 12 hours ago

    Saint Louis (STL)to

    Cancun (CUN)
    12/08/26 - 12/15/26

    Round trip

    Economy

    from
    $388Fare subject to changes
    Updated: 12 hours ago

    Saint Louis (STL)to

    Cancun (CUN)
    11/17/26 - 11/24/26

    Round trip

    Economy

    from
    $388Fare subject to changes
    Updated: 12 hours ago

    Saint Louis (STL)to

    Cancun (CUN)
    10/27/26 - 11/03/26

    Round trip

    Economy

    from
    $388Fare subject to changes
    Updated: 12 hours ago

    Saint Louis (STL)to

    Cancun (CUN)
    10/20/26 - 10/27/26

    Round trip

    Economy

    from
    $388Fare subject to changes
    Updated: 12 hours ago

    Saint Louis (STL)to

    Cancun (CUN)
    11/10/26 - 11/17/26

    Round trip

    Economy

    from
    $388Fare subject to changes
    Updated: 12 hours ago

    Saint Louis (STL)to

    Cancun (CUN)
    01/13/27 - 01/20/27

    Round trip

    Economy

    from
    $393Fare subject to changes
    Updated: 12 hours ago

    Saint Louis (STL)to

    Cancun (CUN)
    12/09/26 - 12/16/26

    Round trip

    Economy

    from
    $393Fare subject to changes
    Updated: 12 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 Saint Louis to Cancun

    Looking for lower fares on your trip from Saint Louis to Cancun? 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

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    • 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 Saint Louis to Cancun