American Airlines flights from Saint Louis to San Juan

Recent searches for flights from Saint Louis to San Juan

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Jul 2026
No results available
Aug 2026
From$356*
Updated: 2 hours ago
Round tripIEconomy
Sep 2026
From$356*
Updated: 3 hours ago
Round tripIEconomy
cmp-daily-histogram-bars-legend-min-price-aria-label $356
cmp-daily-histogram-bars-legend-max-price-aria-label $716
Displaying fares for July-2026
  • STL–SJU: cmp-view-offers-disclaimer. Find Offers
    31

    Fr

    JUL

  • STL–SJU, 08/01/26 – 08/08/26: From $711
    01

    Sa

  • STL–SJU, 08/02/26 – 08/09/26: From $711
    02

    Su

  • STL–SJU, 08/03/26 – 08/10/26: From $711
    03

    Mo

  • STL–SJU, 08/04/26 – 08/11/26: From $711
    04

    Tu

  • STL–SJU, 08/05/26 – 08/12/26: From $716
    05

    We

  • STL–SJU, 08/06/26 – 08/13/26: From $711
    06

    Th

  • STL–SJU, 08/07/26 – 08/14/26: From $601
    07

    Fr

  • STL–SJU, 08/08/26 – 08/15/26: From $601
    08

    Sa

  • STL–SJU, 08/09/26 – 08/16/26: From $601
    09

    Su

  • STL–SJU, 08/10/26 – 08/17/26: From $601
    10

    Mo

  • STL–SJU, 08/11/26 – 08/18/26: From $601
    11

    Tu

  • STL–SJU, 08/12/26 – 08/19/26: From $606
    12

    We

  • STL–SJU, 08/13/26 – 08/20/26: From $601
    13

    Th

  • STL–SJU, 08/14/26 – 08/21/26: From $456
    14

    Fr

  • STL–SJU, 08/15/26 – 08/22/26: From $456
    15

    Sa

  • STL–SJU, 08/16/26 – 08/23/26: From $456
    16

    Su

  • STL–SJU, 08/17/26 – 08/24/26: From $456
    17

    Mo

  • STL–SJU, 08/18/26 – 08/25/26: From $456
    18

    Tu

  • STL–SJU, 08/19/26 – 08/26/26: From $461
    19

    We

  • STL–SJU, 08/20/26 – 08/24/26: From $456
    20

    Th

  • STL–SJU, 08/21/26 – 08/28/26: From $356
    21

    Fr

  • STL–SJU, 08/22/26 – 08/29/26: From $356
    22

    Sa

  • STL–SJU, 08/23/26 – 08/30/26: From $356
    23

    Su

  • STL–SJU, 08/24/26 – 08/31/26: From $356
    24

    Mo

  • STL–SJU, 08/25/26 – 09/01/26: From $356
    25

    Tu

  • STL–SJU, 08/26/26 – 09/02/26: From $361
    26

    We

  • STL–SJU, 08/27/26 – 09/03/26: From $381
    27

    Th

  • STL–SJU: cmp-view-offers-disclaimer. Find Offers
    28

    Fr

  • STL–SJU: cmp-view-offers-disclaimer. Find Offers
    29

    Sa

  • STL–SJU, 08/30/26 – 09/04/26: From $381
    30

    Su

    • range$356-$716

    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 San Juan flights

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    Saint Louis (STL)to

    San Juan (SJU)
    02/20/27 - 02/27/27

    Round trip

    Economy

    from
    $356Fare subject to changes
    Updated: 17 hours ago

    Saint Louis (STL)to

    San Juan (SJU)
    09/03/26 - 09/10/26

    Round trip

    Economy

    from
    $356Fare subject to changes
    Updated: 2 hours ago

    Saint Louis (STL)to

    San Juan (SJU)
    09/05/26 - 09/12/26

    Round trip

    Economy

    from
    $356Fare subject to changes
    Updated: 2 hours ago

    Saint Louis (STL)to

    San Juan (SJU)
    09/19/26 - 09/26/26

    Round trip

    Economy

    from
    $356Fare subject to changes
    Updated: 2 hours ago

    Saint Louis (STL)to

    San Juan (SJU)
    09/25/26 - 10/02/26

    Round trip

    Economy

    from
    $356Fare subject to changes
    Updated: 2 hours ago

    Saint Louis (STL)to

    San Juan (SJU)
    09/26/26 - 10/03/26

    Round trip

    Economy

    from
    $356Fare subject to changes
    Updated: 2 hours ago

    Saint Louis (STL)to

    San Juan (SJU)
    10/01/26 - 10/08/26

    Round trip

    Economy

    from
    $356Fare subject to changes
    Updated: 2 hours ago

    Saint Louis (STL)to

    San Juan (SJU)
    10/03/26 - 10/10/26

    Round trip

    Economy

    from
    $356Fare subject to changes
    Updated: 2 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 San Juan

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