Porto (OPO) to Washington (IAD) flight deal in economy from $341
OPOFrancisco Sá Carneiro Airport
Porto, Portugal
IADWashington Dulles International Airport
Washington, United States
$540 USD
-37%$341 USD
Verified about 12 hours agoJuly 2026
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Good Availability
57% of dates checked are available within 10% of the lowest price
Wednesday, July 1st, 2026
No flight details available for this date.