Flights from Porto (OPO) starting at $ 543*

Promotion Code

Changed bag rules and optional services         Cruise Packages

Fly from Porto and get United's best fares

$
keyboard_arrow_down

  • Porto (OPO)to

    Houston (IAH)
    06/03/26 - 07/27/26
    from
    $ 1,031
    Viewed: 27 minutes ago
    Roundtrip
    Economy

    Porto (OPO)to

    Denver (DEN)
    07/28/26 - 08/18/26
    from
    $ 1,286
    Viewed: 7 hours ago
    Roundtrip
    Economy

    Porto (OPO)to

    Los Angeles (LAX)
    06/14/26 - 07/01/26
    from
    $ 980
    Viewed: 1 hour ago
    Roundtrip
    Economy

    Porto (OPO)to

    Portland, OR (PDX)
    03/03/26 - 03/17/26
    from
    $ 893
    Viewed: 13 hours 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 Porto (OPO)

$
keyboard_arrow_down
United popular flights from Porto (OPO)
From
To
Fare Type
Dates
Price
Porto (OPO)Newark/New York (EWR)Roundtrip
|
Economy		03/01/26 - 03/17/26

from

$ 543

Viewed: 12 hours ago

Porto (OPO)Chicago (ORD)Roundtrip
|
Economy		01/25/26 - 02/01/26

from

$ 990

Viewed: 3 hours ago

Porto (OPO)Washington, D.C. (IAD)Roundtrip
|
Economy		02/15/26 - 03/31/26

from

$ 590

Viewed: 1 day ago

Porto (OPO)San Francisco (SFO)Roundtrip
|
Economy		03/20/26 - 03/22/26

from

$ 744

Viewed: 1 day ago

Porto (OPO)Houston (IAH)Roundtrip
|
Economy		06/03/26 - 07/27/26

from

$ 1,031

Viewed: 27 minutes ago

Porto (OPO)Denver (DEN)Roundtrip
|
Economy		07/28/26 - 08/18/26

from

$ 1,286

Viewed: 7 hours ago

Porto (OPO)Los Angeles (LAX)Roundtrip
|
Economy		06/14/26 - 07/01/26

from

$ 980

Viewed: 1 hour ago

Porto (OPO)Portland, OR (PDX)Roundtrip
|
Economy		03/03/26 - 03/17/26

from

$ 893

Viewed: 13 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.

Explore United Airlines's Top-Pick Destinations

More United flights from Porto