Flights from Porto to San Francisco from € 726*

Promotion Code

Changed bag rules and optional services         Cruise Packages

Featured daily fares for flights from Porto (OPO) to San Francisco (SFO)

May 2026
From€ 726*
Viewed: 8 hours ago
RoundTrip|Economy
Jun 2026
From€ 726*
Viewed: 8 hours ago
RoundTrip|Economy
Jul 2026
From€ 836*
Viewed: 8 hours ago
RoundTrip|Economy
cmp-daily-histogram-bars-legend-min-price-aria-label € 726
cmp-daily-histogram-bars-legend-max-price-aria-label € 1.3K
Displaying fares for May-2026
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    • Range€ 726-€ 1.321

    *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 Porto (OPO) to San Francisco (SFO) flights

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    More United deals on Porto (OPO) to San Francisco (SFO) flights
    From
    To
    Fare Type
    Dates
    Price
    Porto (OPO)San Francisco (SFO)Roundtrip
    |
    Economy    		28/05/2026 - 01/06/2026

    from

    € 726

    Viewed: 8 hours ago

    Porto (OPO)San Francisco (SFO)Roundtrip
    |
    Economy    		26/05/2026 - 02/06/2026

    from

    € 726

    Viewed: 8 hours ago

    Porto (OPO)San Francisco (SFO)Roundtrip
    |
    Economy    		27/05/2026 - 31/05/2026

    from

    € 726

    Viewed: 8 hours ago

    Porto (OPO)San Francisco (SFO)Roundtrip
    |
    Economy    		05/06/2026 - 12/06/2026

    from

    € 726

    Viewed: 8 hours ago

    Porto (OPO)San Francisco (SFO)Roundtrip
    |
    Economy    		17/06/2026 - 21/06/2026

    from

    € 729

    Viewed: 8 hours ago

    Porto (OPO)San Francisco (SFO)Roundtrip
    |
    Economy    		18/06/2026 - 22/06/2026

    from

    € 729

    Viewed: 8 hours ago

    Porto (OPO)San Francisco (SFO)Roundtrip
    |
    Economy    		17/06/2026 - 24/06/2026

    from

    € 729

    Viewed: 8 hours ago

    Porto (OPO)San Francisco (SFO)Roundtrip
    |
    Economy    		10/06/2026 - 24/06/2026

    from

    € 729

    Viewed: 8 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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