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 agoAugust 2026
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Limited Availability
19% of dates checked are available within 10% of the lowest price
Monday, August 31st, 2026
6 round-trip options
Returning
Sun, Sep 6, 2026•6 Day Trip
$1,102 USD
Returning
Mon, Sep 7, 2026•7 Day Trip
$1,115 USD
Returning
Tue, Sep 8, 2026•8 Day Trip
$972 USD
Returning
Thu, Sep 10, 2026•10 Day Trip
$972 USD
Returning
Sat, Sep 12, 2026•12 Day Trip
$1,102 USD
Returning
Mon, Sep 14, 2026•14 Day Trip
$1,115 USD