Flights from Porto to Washington, D.C. from € 594*

Promotion Code

Changed bag rules and optional services         Cruise Packages

Featured daily fares for flights from Porto (OPO) to Washington, D.C. (IAD)

May 2026
From€ 620*
Viewed: 9 hours ago
RoundTrip|Economy
Jun 2026
From€ 594*
Viewed: 9 hours ago
RoundTrip|Economy
Jul 2026
From€ 684*
Viewed: 9 hours ago
RoundTrip|Economy
cmp-daily-histogram-bars-legend-min-price-aria-label € 594
cmp-daily-histogram-bars-legend-max-price-aria-label € 962
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    • Range€ 594-€ 962

    *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 Washington, D.C. (IAD) flights

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    More United deals on Porto (OPO) to Washington, D.C. (IAD) flights
    From
    To
    Fare Type
    Dates
    Price
    Porto (OPO)Washington, D.C. (IAD)Roundtrip
    |
    Economy    		12/06/2026 - 16/06/2026

    from

    € 594

    Viewed: 9 hours ago

    Porto (OPO)Washington, D.C. (IAD)Roundtrip
    |
    Economy    		16/06/2026 - 23/06/2026

    from

    € 594

    Viewed: 9 hours ago

    Porto (OPO)Washington, D.C. (IAD)Roundtrip
    |
    Economy    		04/06/2026 - 08/06/2026

    from

    € 594

    Viewed: 9 hours ago

    Porto (OPO)Washington, D.C. (IAD)Roundtrip
    |
    Economy    		10/06/2026 - 14/06/2026

    from

    € 594

    Viewed: 9 hours ago

    Porto (OPO)Washington, D.C. (IAD)Roundtrip
    |
    Economy    		06/06/2026 - 13/06/2026

    from

    € 614

    Viewed: 9 hours ago

    Porto (OPO)Washington, D.C. (IAD)Roundtrip
    |
    Economy    		06/06/2026 - 20/06/2026

    from

    € 614

    Viewed: 9 hours ago

    Porto (OPO)Washington, D.C. (IAD)Roundtrip
    |
    Economy    		18/06/2026 - 22/06/2026

    from

    € 615

    Viewed: 9 hours ago

    Porto (OPO)Washington, D.C. (IAD)Roundtrip
    |
    Economy    		06/06/2026 - 10/06/2026

    from

    € 617

    Viewed: 9 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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