Porto (OPO) to Washington (IAD) flight deal from $589 USD in economy class

IBIberia Airlines

Round Trip•Economy

OPO

Francisco Sá Carneiro Airport

Porto, Portugal

IAD

Washington Dulles International Airport

Washington, United States

$1,018 USD

-42%$589 USD

Verified Oct 15, 2025 at 10:54 PM

October 2025

Today

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Tue

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29 30 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16$1,679 17$1,479 18$1,842 19$1,009 20$1,128 21$1,003 22$805 23$785 24$648 25$1,635 26$1,432 27$1,043 28$908 29$1,111 30$1,083 31$1,524 1$1,635 2$2,207

Fair Availability

25% of dates checked are available within 10% of the lowest price

Tuesday, October 28th, 2025

7 round-trip options

Returning

Sun, Nov 2, 2025•5 Day Trip

$1,042 USD

Google Flights

Returning

Tue, Nov 4, 2025•7 Day Trip

$942 USD

Google Flights

Returning

Wed, Nov 5, 2025•8 Day Trip

$1,134 USD

Google Flights

Returning

Thu, Nov 6, 2025•9 Day Trip

$908 USD

Google Flights

Returning

Fri, Nov 7, 2025•10 Day Trip

$1,076 USD

Google Flights

Returning

Sun, Nov 9, 2025•12 Day Trip

$908 USD

Google Flights

Returning

Tue, Nov 11, 2025•14 Day Trip

$2,513 USD

Google Flights