Porto (OPO) to Washington (IAD) flight deal in economy from $641
OPOFrancisco Sá Carneiro Airport
Porto, Portugal
IADWashington Dulles International Airport
Washington, United States
$817 USD
-22%$641 USD
Verified 13 days agoAugust 2026
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Good Availability
51% of dates checked are available within 10% of the lowest price
Sunday, August 16th, 2026
5 round-trip options
Returning
Sat, Aug 22, 2026•6 Day Trip
$2,361 USD
Returning
Mon, Aug 24, 2026•8 Day Trip
$2,312 USD
Returning
Tue, Aug 25, 2026•9 Day Trip
$2,261 USD
Returning
Thu, Aug 27, 2026•11 Day Trip
$2,332 USD
Returning
Sun, Aug 30, 2026•14 Day Trip
$2,332 USD