Bilbao (BIO) to Washington (IAD) flight deal from $539 USD in economy class

IBIberia Airlines

Round Trip•Economy

BIO

Bilbao Airport

Bilbao, Spain

IAD

Washington Dulles International Airport

Washington, United States

$1,085 USD

-50%$539 USD

Verified Apr 7, 2026 at 3:47 AM

April 2026

Today

Mon

Tue

Wed

Thu

Fri

Sat

Sun

30 31 1 2 3 4 5 6 7$1,338 8$1,104 9$1,126 10$1,143 11$1,208 12$1,346 13$1,104 14$745 15$539 16$745 17$631 18$763 19$1,011 20$614 21$614 22$562 23$745 24$557 25$832 26$763 27$614 28$539 29$539 30$745 1$631 2$557 3$649

Rare Availability

6% of dates checked are available within 10% of the lowest price

Wednesday, April 8th, 2026

9 round-trip options

Returning

Mon, Apr 13, 2026•5 Day Trip

$1,212 USD

Google Flights

Returning

Tue, Apr 14, 2026•6 Day Trip

$1,126 USD

Google Flights

Returning

Wed, Apr 15, 2026•7 Day Trip

$1,327 USD

Google Flights

Returning

Fri, Apr 17, 2026•9 Day Trip

$3,580 USD

Google Flights

Returning

Sat, Apr 18, 2026•10 Day Trip

$1,352 USD

Google Flights

Returning

Sun, Apr 19, 2026•11 Day Trip

$1,352 USD

Google Flights

Returning

Mon, Apr 20, 2026•12 Day Trip

$1,104 USD

Google Flights

Returning

Tue, Apr 21, 2026•13 Day Trip

$1,104 USD

Google Flights

Returning

Wed, Apr 22, 2026•14 Day Trip

$1,104 USD

Google Flights