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
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Limited Availability
19% of dates checked are available within 10% of the lowest price
Tuesday, August 18th, 2026
6 round-trip options
Returning
Mon, Aug 24, 2026•6 Day Trip
$1,180 USD
Returning
Tue, Aug 25, 2026•7 Day Trip
$859 USD
Returning
Wed, Aug 26, 2026•8 Day Trip
$1,061 USD
Returning
Fri, Aug 28, 2026•10 Day Trip
$1,118 USD
Returning
Sun, Aug 30, 2026•12 Day Trip
$1,233 USD
Returning
Tue, Sep 1, 2026•14 Day Trip
$859 USD