Porto (OPO) to Washington (IAD) flight deal in economy from $599
OPOFrancisco Sá Carneiro Airport
Porto, Portugal
IADWashington Dulles International Airport
Washington, United States
$785 USD
-24%$599 USD
Verified about 2 hours agoSeptember 2026
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Good Availability
45% of dates checked are available within 10% of the lowest price
Saturday, September 12th, 2026
0 round-trip options
No flight details available for this date.