Washington (IAD) to Porto (OPO) flight deal in economy from $739
IADWashington Dulles International Airport
Washington, United States
OPOFrancisco Sá Carneiro Airport
Porto, Portugal
$1,088 USD
-32%$739 USD
Verified 13 days agoSeptember 2026
Mon
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Limited Availability
19% of dates checked are available within 10% of the lowest price
Tuesday, September 8th, 2026
5 round-trip options
Returning
Mon, Sep 14, 2026•6 Day Trip
$1,115 USD
Returning
Wed, Sep 16, 2026•8 Day Trip
$916 USD
Returning
Thu, Sep 17, 2026•9 Day Trip
$916 USD
Returning
Sat, Sep 19, 2026•11 Day Trip
$976 USD
Returning
Mon, Sep 21, 2026•13 Day Trip
$976 USD