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 agoJuly 2026
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Limited Availability
19% of dates checked are available within 10% of the lowest price
Saturday, July 18th, 2026
6 round-trip options
Returning
Fri, Jul 24, 2026•6 Day Trip
$1,392 USD
Returning
Sat, Jul 25, 2026•7 Day Trip
$1,208 USD
Returning
Sun, Jul 26, 2026•8 Day Trip
$1,208 USD
Returning
Tue, Jul 28, 2026•10 Day Trip
$1,138 USD
Returning
Thu, Jul 30, 2026•12 Day Trip
$1,226 USD
Returning
Sat, Aug 1, 2026•14 Day Trip
$1,402 USD