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 13 days agoAugust 2026
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Great Availability
66% of dates checked are available within 10% of the lowest price
Sunday, August 2nd, 2026
7 round-trip options
Returning
Sat, Aug 8, 2026•6 Day Trip
$900 USD
Returning
Sun, Aug 9, 2026•7 Day Trip
$893 USD
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Mon, Aug 10, 2026•8 Day Trip
$893 USD
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Tue, Aug 11, 2026•9 Day Trip
$893 USD
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Thu, Aug 13, 2026•11 Day Trip
$901 USD
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Fri, Aug 14, 2026•12 Day Trip
$908 USD
Returning
Sat, Aug 15, 2026•13 Day Trip
$901 USD