Flights from San Juan to Saint Louis from $ 316*

Promotion Code

Featured daily fares for flights from San Juan (SJU) to Saint Louis (STL)

$ 316
$ 890
Displaying fares for March-2026
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    MAR

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  • Range$ 316-$ 890

    More United deals on San Juan (SJU) to Saint Louis (STL) flights

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    More United deals on San Juan (SJU) to Saint Louis (STL) flights
    From
    To
    Fare Type
    Dates
    Price
    San Juan (SJU)Saint Louis (STL)Roundtrip
    |
    Economy
    04/16/26 - 04/20/26

    from

    $ 316

    Viewed: 11 hours ago

    San Juan (SJU)Saint Louis (STL)Roundtrip
    |
    Economy
    05/07/26 - 05/11/26

    from

    $ 351

    Viewed: 11 hours ago

    San Juan (SJU)Saint Louis (STL)Roundtrip
    |
    Economy
    04/25/26 - 05/02/26

    from

    $ 381

    Viewed: 11 hours ago

    San Juan (SJU)Saint Louis (STL)Roundtrip
    |
    Economy
    04/22/26 - 05/06/26

    from

    $ 383

    Viewed: 11 hours ago

    San Juan (SJU)Saint Louis (STL)Roundtrip
    |
    Economy
    04/22/26 - 04/26/26

    from

    $ 383

    Viewed: 11 hours ago

    San Juan (SJU)Saint Louis (STL)Roundtrip
    |
    Economy
    04/17/26 - 04/21/26

    from

    $ 391

    Viewed: 11 hours ago

    San Juan (SJU)Saint Louis (STL)Roundtrip
    |
    Economy
    04/15/26 - 04/22/26

    from

    $ 404

    Viewed: 11 hours ago

    San Juan (SJU)Saint Louis (STL)Roundtrip
    |
    Economy
    04/29/26 - 05/06/26

    from

    $ 416

    Viewed: 11 hours ago

    *Prices have been available for round trips within the last 48 hours and may not be currently available. For Economy class, fares listed may be Basic Economy, which is our most restrictive fare option and subject to additional restrictions. Additional baggage charges and fees for other optional service may apply. Other terms and conditions may apply. Schedules are subject to change without notice.