Flights from Boston to Billings from $ 349*

Promotion Code

Changed bag rules and optional services         Cruise Packages

Featured daily fares for flights from Boston (BOS) to Billings (BIL)

Try alternate month or interact with individual days below in order to find offers.
May 2026
No result for this month
Jun 2026
From$ 455*
Viewed: 15 hours ago
RoundTrip|Economy
Jul 2026
From$ 445*
Viewed: 15 hours ago
RoundTrip|Economy
cmp-daily-histogram-bars-legend-min-price-aria-label $ 455
cmp-daily-histogram-bars-legend-max-price-aria-label $ 914
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    • Range$ 455-$ 914

    *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 Billings (BIL) flights

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    More United deals on Boston (BOS) to Billings (BIL) flights
    From
    To
    Fare Type
    Dates
    Price
    Boston (BOS)Billings (BIL)Roundtrip
    |
    Economy    		08/25/26 - 09/01/26

    from

    $ 349

    Viewed: 15 hours ago

    Boston (BOS)Billings (BIL)Roundtrip
    |
    Economy    		08/28/26 - 09/01/26

    from

    $ 349

    Viewed: 15 hours ago

    Boston (BOS)Billings (BIL)Roundtrip
    |
    Economy    		08/21/26 - 08/25/26

    from

    $ 396

    Viewed: 15 hours ago

    Boston (BOS)Billings (BIL)Roundtrip
    |
    Economy    		08/28/26 - 09/04/26

    from

    $ 417

    Viewed: 15 hours ago

    Boston (BOS)Billings (BIL)Roundtrip
    |
    Economy    		08/29/26 - 09/01/26

    from

    $ 421

    Viewed: 15 hours ago

    Boston (BOS)Billings (BIL)Roundtrip
    |
    Economy    		07/09/26 - 07/13/26

    from

    $ 445

    Viewed: 15 hours ago

    Boston (BOS)Billings (BIL)Roundtrip
    |
    Economy    		06/02/26 - 06/09/26

    from

    $ 455

    Viewed: 15 hours ago

    Boston (BOS)Billings (BIL)Roundtrip
    |
    Economy    		06/02/26 - 06/06/26

    from

    $ 455

    Viewed: 15 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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