Flights from Ontario to Las Vegas from $ 183*

Promotion Code

Changed bag rules and optional services         Cruise Packages

Featured daily fares for flights from Ontario (ONT) to Las Vegas (LAS)

Mar 2026
From$ 559*
Viewed: 10 hours ago
RoundTrip|Economy
Apr 2026
From$ 183*
Viewed: 9 hours ago
RoundTrip|Economy
May 2026
From$ 232*
Viewed: 20 hours ago
RoundTrip|Economy
$ 183
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    • Range$ 183-$ 559

    *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 Ontario (ONT) to Las Vegas (LAS) flights

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    More United deals on Ontario (ONT) to Las Vegas (LAS) flights
    From
    To
    Fare Type
    Dates
    Price
    Ontario (ONT)Las Vegas (LAS)Roundtrip
    |
    Economy    		04/22/26 - 04/29/26

    from

    $ 183

    Viewed: 9 hours ago

    Ontario (ONT)Las Vegas (LAS)Roundtrip
    |
    Economy    		04/17/26 - 04/20/26

    from

    $ 232

    Viewed: 1 day ago

    Ontario (ONT)Las Vegas (LAS)Roundtrip
    |
    Economy    		05/04/26 - 05/08/26

    from

    $ 232

    Viewed: 20 hours ago

    Ontario (ONT)Las Vegas (LAS)Roundtrip
    |
    Economy    		04/30/26 - 05/02/26

    from

    $ 256

    Viewed: 23 hours ago

    Ontario (ONT)Las Vegas (LAS)Roundtrip
    |
    Economy    		07/04/26 - 07/07/26

    from

    $ 271

    Viewed: 16 hours ago

    Ontario (ONT)Las Vegas (LAS)Roundtrip
    |
    Economy    		08/09/26 - 08/14/26

    from

    $ 271

    Viewed: 8 hours ago

    Ontario (ONT)Las Vegas (LAS)Roundtrip
    |
    Economy    		05/15/26 - 05/17/26

    from

    $ 278

    Viewed: 1 day ago

    Ontario (ONT)Las Vegas (LAS)Roundtrip
    |
    Economy    		07/10/26 - 07/13/26

    from

    $ 337

    Viewed: 9 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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