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 agoSeptember 2026
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Limited Availability
19% of dates checked are available within 10% of the lowest price
Tuesday, September 29th, 2026
5 round-trip options
Returning
Mon, Oct 5, 2026•6 Day Trip
$919 USD
Returning
Wed, Oct 7, 2026•8 Day Trip
$859 USD
Returning
Thu, Oct 8, 2026•9 Day Trip
$859 USD
Returning
Sat, Oct 10, 2026•11 Day Trip
$975 USD
Returning
Mon, Oct 12, 2026•13 Day Trip
$975 USD