Flights from San Juan to Saint Louis from $ 318*

Promotion Code

Changed bag rules and optional services         Cruise Packages

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

Apr 2026
From$ 437*
Viewed: 22 hours ago
RoundTrip|Economy
May 2026
From$ 318*
Viewed: 22 hours ago
RoundTrip|Economy
Jun 2026
From$ 471*
Viewed: 22 hours ago
RoundTrip|Economy
$ 318
$ 701
Displaying fares for April-2026
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    • Range$ 318-$ 701

    *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.

    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    		05/06/2026 - 05/13/2026

    from

    $ 318

    Viewed: 22 hours ago

    San Juan (SJU)Saint Louis (STL)Roundtrip
    |
    Economy    		05/09/2026 - 05/13/2026

    from

    $ 327

    Viewed: 22 hours ago

    San Juan (SJU)Saint Louis (STL)Roundtrip
    |
    Economy    		05/06/2026 - 05/20/2026

    from

    $ 358

    Viewed: 22 hours ago

    San Juan (SJU)Saint Louis (STL)Roundtrip
    |
    Economy    		05/07/2026 - 05/11/2026

    from

    $ 358

    Viewed: 22 hours ago

    San Juan (SJU)Saint Louis (STL)Roundtrip
    |
    Economy    		05/14/2026 - 05/18/2026

    from

    $ 358

    Viewed: 22 hours ago

    San Juan (SJU)Saint Louis (STL)Roundtrip
    |
    Economy    		05/06/2026 - 05/10/2026

    from

    $ 364

    Viewed: 22 hours ago

    San Juan (SJU)Saint Louis (STL)Roundtrip
    |
    Economy    		05/08/2026 - 05/12/2026

    from

    $ 364

    Viewed: 22 hours ago

    San Juan (SJU)Saint Louis (STL)Roundtrip
    |
    Economy    		05/09/2026 - 05/16/2026

    from

    $ 371

    Viewed: 22 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.

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