Flights from Portland, OR to Knoxville from $ 387*

Promotion Code

Changed bag rules and optional services         Cruise Packages

Featured daily fares for flights from Portland, OR (PDX) to Knoxville (TYS)

Mar 2026
From$ 946*
Viewed: 9 hours ago
RoundTrip|Economy
Apr 2026
From$ 387*
Viewed: 11 hours ago
RoundTrip|Economy
May 2026
From$ 405*
Viewed: 4 hours ago
RoundTrip|Economy
$ 946
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    • Range$ 946

    *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 Portland, OR (PDX) to Knoxville (TYS) flights

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    More United deals on Portland, OR (PDX) to Knoxville (TYS) flights
    From
    To
    Fare Type
    Dates
    Price
    Portland, OR (PDX)Knoxville (TYS)Roundtrip
    |
    Economy    		05/27/26 - 05/31/26

    from

    $ 510

    Viewed: 1 day ago

    Portland, OR (PDX)Knoxville (TYS)Roundtrip
    |
    Economy    		05/27/26 - 05/31/26

    from

    $ 854

    Viewed: 1 day ago

    Portland, OR (PDX)Knoxville (TYS)Roundtrip
    |
    Economy    		04/22/26 - 04/29/26

    from

    $ 387

    Viewed: 11 hours ago

    Portland, OR (PDX)Knoxville (TYS)Roundtrip
    |
    Economy    		05/11/26 - 05/14/26

    from

    $ 405

    Viewed: 4 hours ago

    Portland, OR (PDX)Knoxville (TYS)Roundtrip
    |
    Economy    		06/06/26 - 06/13/26

    from

    $ 457

    Viewed: 11 hours ago

    Portland, OR (PDX)Knoxville (TYS)Roundtrip
    |
    Economy    		07/04/26 - 07/12/26

    from

    $ 596

    Viewed: 8 hours ago

    Portland, OR (PDX)Knoxville (TYS)Roundtrip
    |
    Economy    		04/22/26 - 04/29/26

    from

    $ 725

    Viewed: 11 hours ago

    Portland, OR (PDX)Knoxville (TYS)Roundtrip
    |
    Economy    		06/06/26 - 06/13/26

    from

    $ 726

    Viewed: 11 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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