Flights from Ontario to Austin from $ 230*

Promotion Code

Changed bag rules and optional services         Cruise Packages

Featured daily fares for flights from Ontario (ONT) to Austin (AUS)

Mar 2026
From$ 417*
Viewed: 21 hours ago
RoundTrip|Economy
Apr 2026
From$ 230*
Viewed: 12 hours ago
RoundTrip|Economy
May 2026
From$ 394*
Viewed: 21 hours ago
RoundTrip|Economy
$ 230
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    • Range$ 230-$ 417

    *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 Austin (AUS) flights

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    More United deals on Ontario (ONT) to Austin (AUS) flights
    From
    To
    Fare Type
    Dates
    Price
    Ontario (ONT)Austin (AUS)Roundtrip
    |
    Economy    		04/17/26 - 04/21/26

    from

    $ 230

    Viewed: 12 hours ago

    Ontario (ONT)Austin (AUS)Roundtrip
    |
    Economy    		06/04/26 - 06/07/26

    from

    $ 320

    Viewed: 22 hours ago

    Ontario (ONT)Austin (AUS)Roundtrip
    |
    Economy    		06/12/26 - 06/15/26

    from

    $ 350

    Viewed: 6 hours ago

    Ontario (ONT)Austin (AUS)Roundtrip
    |
    Economy    		05/22/26 - 05/26/26

    from

    $ 394

    Viewed: 21 hours ago

    Ontario (ONT)Austin (AUS)Roundtrip
    |
    Economy    		03/30/26 - 04/03/26

    from

    $ 417

    Viewed: 21 hours ago

    Ontario (ONT)Austin (AUS)Roundtrip
    |
    Economy    		04/17/26 - 04/21/26

    from

    $ 578

    Viewed: 12 hours ago

    Ontario (ONT)Austin (AUS)Roundtrip
    |
    Economy    		06/04/26 - 06/07/26

    from

    $ 598

    Viewed: 22 hours ago

    Ontario (ONT)Austin (AUS)Roundtrip
    |
    Economy    		06/12/26 - 06/15/26

    from

    $ 622

    Viewed: 6 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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