Porto (OPO) to Washington (IAD) flight deal from $512 USD in economy class

IBIberia Airlines

Round Trip•Economy

OPO

Francisco Sá Carneiro Airport

Porto, Portugal

IAD

Washington Dulles International Airport

Washington, United States

$1,003 USD

-49%$512 USD

Verified Nov 29, 2025 at 7:05 AM

February 2026

Today

Mon

Tue

Wed

Thu

Fri

Sat

Sun

26$714 27$512 28$653 29$512 30$517 31$653 1$512 2$766 3$512 4$653 5$512 6$534 7$631 8$512 9$766 10$512 11$563 12$512 13$688 14$734 15$525 16$835 17$512 18$835 19$512 20$1,381 21$835 22$512 23$745 24$512 25$517 26$512 27$517 28$687 1

Fair Availability

28% of dates checked are available within 10% of the lowest price

Friday, February 20th, 2026

6 round-trip options

Returning

Wed, Feb 25, 2026•5 Day Trip

$1,656 USD

Google Flights

Returning

Thu, Feb 26, 2026•6 Day Trip

$1,394 USD

Google Flights

Returning

Tue, Mar 3, 2026•11 Day Trip

$1,394 USD

Google Flights

Returning

Wed, Mar 4, 2026•12 Day Trip

$1,517 USD

Google Flights

Returning

Thu, Mar 5, 2026•13 Day Trip

$1,394 USD

Google Flights

Returning

Fri, Mar 6, 2026•14 Day Trip

$1,381 USD

Google Flights