Porto (OPO) to Washington (IAD) flight deal in economy from $676
OPOFrancisco Sá Carneiro Airport
Porto, Portugal
IADWashington Dulles International Airport
Washington, United States
$739 USD
-9%$676 USD
Verified 15 days agoDecember 2026
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Great Availability
66% of dates checked are available within 10% of the lowest price
Thursday, December 17th, 2026
3 round-trip options
Returning
Tue, Dec 22, 2026•5 Day Trip
$749 USD
Returning
Thu, Dec 24, 2026•7 Day Trip
$707 USD
Returning
Tue, Dec 29, 2026•12 Day Trip
$686 USD