Flights from Pittsburgh to Saint Louis from $ 276*

Promotion Code

Changed bag rules and optional services         Cruise Packages

Featured daily fares for flights from Pittsburgh (PIT) to Saint Louis (STL)

Mar 2026
From$ 363*
Viewed: 12 hours ago
RoundTrip|Economy
Apr 2026
From$ 276*
Viewed: 1 day ago
RoundTrip|Economy
May 2026
From$ 307*
Viewed: 1 day ago
RoundTrip|Economy
$ 276
Displaying fares for March-2026
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    • Range$ 276-$ 363

    *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 Pittsburgh (PIT) to Saint Louis (STL) flights

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    More United deals on Pittsburgh (PIT) to Saint Louis (STL) flights
    From
    To
    Fare Type
    Dates
    Price
    Pittsburgh (PIT)Saint Louis (STL)Roundtrip
    |
    Economy    		04/12/26 - 04/16/26

    from

    $ 276

    Viewed: 1 day ago

    Pittsburgh (PIT)Saint Louis (STL)Roundtrip
    |
    Economy    		05/22/26 - 05/24/26

    from

    $ 307

    Viewed: 1 day ago

    Pittsburgh (PIT)Saint Louis (STL)Roundtrip
    |
    Economy    		04/12/26 - 04/16/26

    from

    $ 446

    Viewed: 1 day ago

    Pittsburgh (PIT)Saint Louis (STL)Roundtrip
    |
    Economy    		05/22/26 - 05/24/26

    from

    $ 481

    Viewed: 1 day ago

    Pittsburgh (PIT)Saint Louis (STL)Roundtrip
    |
    Economy    		04/12/26 - 04/16/26

    from

    $ 545

    Viewed: 1 day ago

    Pittsburgh (PIT)Saint Louis (STL)Roundtrip
    |
    Economy    		05/22/26 - 05/24/26

    from

    $ 576

    Viewed: 1 day ago

    Pittsburgh (PIT)Saint Louis (STL)Roundtrip
    |
    Economy    		03/27/26 - 03/29/26

    from

    $ 363

    Viewed: 12 hours ago

    Pittsburgh (PIT)Saint Louis (STL)Roundtrip
    |
    Economy    		03/27/26 - 03/29/26

    from

    $ 501

    Viewed: 12 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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