Flights from Ontario (ONT) starting at $ 117*

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Fly from Ontario and get United's best fares

$
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  • Ontario (ONT)to

    Taipei (TPE)
    04/11/26 - 04/15/26
    from
    $ 922
    Viewed: 18 hours ago
    Roundtrip
    Economy

    Ontario (ONT)to

    Newark/New York (EWR)
    05/06/26 - 05/19/26
    from
    $ 298
    Viewed: 1 day ago
    Roundtrip
    Economy

    Ontario (ONT)to

    San Salvador (SAL)
    04/25/26 - 05/09/26
    from
    $ 375
    Viewed: 1 day ago
    Roundtrip
    Economy

    Ontario (ONT)to

    Boston (BOS)
    04/30/26 - 05/04/26
    from
    $ 309
    Viewed: 23 hours ago
    Roundtrip
    Economy

  • Ontario (ONT)to

    Miami (MIA)
    04/22/26 - 04/25/26
    from
    $ 281
    Viewed: 10 hours ago
    Roundtrip
    Economy

    Ontario (ONT)to

    Seattle (SEA)
    06/06/26 - 06/09/26
    from
    $ 237
    Viewed: 43 minutes ago
    Roundtrip
    Economy

    Ontario (ONT)to

    Nashville (BNA)
    07/01/26 - 07/08/26
    from
    $ 324
    Viewed: 12 hours ago
    Roundtrip
    Economy

    Ontario (ONT)to

    Dallas (DFW)
    05/27/26 - 06/03/26
    from
    $ 321
    Viewed: 45 minutes ago
    Roundtrip
    Economy

  • Ontario (ONT)to

    Washington, D.C. (IAD)
    06/30/26 - 07/07/26
    from
    $ 321
    Viewed: 9 hours ago
    Roundtrip
    Economy

    Ontario (ONT)to

    Las Vegas (LAS)
    04/29/26 - 05/02/26
    from
    $ 217
    Viewed: 1 hour ago
    Roundtrip
    Economy

    Ontario (ONT)to

    Medford (MFR)
    04/30/26 - 05/01/26
    from
    $ 323
    Viewed: 12 hours ago
    Roundtrip
    Economy

    Ontario (ONT)to

    Newark/New York (LGA)
    07/22/26 - 07/28/26
    from
    $ 297
    Viewed: 22 hours ago
    Roundtrip
    Economy

  • Ontario (ONT)to

    Honolulu (HNL)
    05/12/26 - 05/19/26
    from
    $ 396
    Viewed: 1 hour ago
    Roundtrip
    Economy

    Ontario (ONT)to

    Cancun (CUN)
    07/04/26 - 07/08/26
    from
    $ 486
    Viewed: 18 hours ago
    Roundtrip
    Economy

    Ontario (ONT)to

    Vancouver (YVR)
    04/25/26 - 04/29/26
    from
    $ 265
    Viewed: 18 hours ago
    Roundtrip
    Economy

    Ontario (ONT)to

    Baltimore (BWI)
    05/05/26 - 05/12/26
    from
    $ 410
    Viewed: 56 minutes ago
    Roundtrip
    Economy

*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.

United popular flights from Ontario (ONT)

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United popular flights from Ontario (ONT)
From
To
Fare Type
Dates
Price
Ontario (ONT)San Francisco (SFO)Roundtrip
|
Economy		04/29/26 - 04/29/26

from

$ 117

Viewed: 10 hours ago

Ontario (ONT)Denver (DEN)Roundtrip
|
Economy		05/05/26 - 05/06/26

from

$ 137

Viewed: 23 hours ago

Ontario (ONT)Chicago (ORD)Roundtrip
|
Economy		05/05/26 - 05/12/26

from

$ 219

Viewed: 49 minutes ago

Ontario (ONT)Houston (IAH)Roundtrip
|
Economy		06/02/26 - 06/06/26

from

$ 197

Viewed: 1 day ago

Ontario (ONT)Taipei (TPE)Roundtrip
|
Economy		04/18/26 - 04/22/26

from

$ 922

Viewed: 18 hours ago

Ontario (ONT)Newark/New York (EWR)Roundtrip
|
Economy		05/06/26 - 05/19/26

from

$ 298

Viewed: 1 day ago

Ontario (ONT)San Salvador (SAL)Roundtrip
|
Economy		04/25/26 - 05/09/26

from

$ 375

Viewed: 1 day ago

Ontario (ONT)Boston (BOS)Roundtrip
|
Economy		04/30/26 - 05/04/26

from

$ 309

Viewed: 23 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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