Flights from Boston to Liberia (Costa Rica) from $ 416*

Promotion Code

Changed bag rules and optional services         Cruise Packages

Featured daily fares for flights from Boston (BOS) to Liberia (Costa Rica) (LIR)

Try alternate month or interact with individual days below in order to find offers.
Mar 2026
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Apr 2026
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May 2026
From$ 450*
Viewed: 1 day ago
RoundTrip|Economy
Displaying fares for March-2026
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    • *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 Boston (BOS) to Liberia (Costa Rica) (LIR) flights

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    More United deals on Boston (BOS) to Liberia (Costa Rica) (LIR) flights
    From
    To
    Fare Type
    Dates
    Price
    Boston (BOS)Liberia (Costa Rica) (LIR)Roundtrip
    |
    Economy    		06/02/26 - 06/08/26

    from

    $ 438

    Viewed: 4 hours ago

    Boston (BOS)Liberia (Costa Rica) (LIR)Roundtrip
    |
    Economy    		10/14/26 - 12/16/26

    from

    $ 542

    Viewed: 6 hours ago

    Boston (BOS)Liberia (Costa Rica) (LIR)Roundtrip
    |
    Economy    		08/15/26 - 08/22/26

    from

    $ 768

    Viewed: 8 hours ago

    Boston (BOS)Liberia (Costa Rica) (LIR)Roundtrip
    |
    Economy    		06/02/26 - 06/08/26

    from

    $ 876

    Viewed: 4 hours ago

    Boston (BOS)Liberia (Costa Rica) (LIR)Roundtrip
    |
    Economy    		10/14/26 - 12/16/26

    from

    $ 916

    Viewed: 6 hours ago

    Boston (BOS)Liberia (Costa Rica) (LIR)Roundtrip
    |
    Economy    		06/02/26 - 06/08/26

    from

    $ 1,021

    Viewed: 4 hours ago

    Boston (BOS)Liberia (Costa Rica) (LIR)Roundtrip
    |
    Economy    		11/09/26 - 11/13/26

    from

    $ 416

    Viewed: 1 day ago

    Boston (BOS)Liberia (Costa Rica) (LIR)Roundtrip
    |
    Economy    		05/17/26 - 05/24/26

    from

    $ 450

    Viewed: 1 day 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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