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
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Limited Availability
19% of dates checked are available within 10% of the lowest price
Sunday, July 5th, 2026
6 round-trip options
Returning
Sat, Jul 11, 2026•6 Day Trip
$1,674 USD
Returning
Sun, Jul 12, 2026•7 Day Trip
$1,497 USD
Returning
Mon, Jul 13, 2026•8 Day Trip
$1,391 USD
Returning
Wed, Jul 15, 2026•10 Day Trip
$1,233 USD
Returning
Fri, Jul 17, 2026•12 Day Trip
$1,555 USD
Returning
Sun, Jul 19, 2026•14 Day Trip
$1,625 USD