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
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Limited Availability
19% of dates checked are available within 10% of the lowest price
Sunday, August 9th, 2026
6 round-trip options
Returning
Sat, Aug 15, 2026•6 Day Trip
$3,495 USD
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Sun, Aug 16, 2026•7 Day Trip
$3,183 USD
Returning
Mon, Aug 17, 2026•8 Day Trip
$1,924 USD
Returning
Wed, Aug 19, 2026•10 Day Trip
$1,923 USD
Returning
Fri, Aug 21, 2026•12 Day Trip
$2,345 USD
Returning
Sun, Aug 23, 2026•14 Day Trip
$2,047 USD