Washington (IAD) to Bilbao (BIO) flight deal from $487 USD in economy class

AAAmerican Airlines

AYFinnair

Washington Dulles International Airport

Washington, United States

BIO

Bilbao Airport

Bilbao, Spain

$983 USD

-50%$487 USD

Verified Nov 3, 2025 at 5:58 PM

November 2025

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27 28 29 30 31 1 2 3$910 4$639 5$1,368 6$709 7$744 8$804 9$800 10$1,103 11$894 12$1,344 13$804 14$904 15$754 16$1,327 17$626 18$626 19$1,042 20$874 21$1,601 22$1,291 23$549 24$645 25$565 26$882 27$540 28$545 29$545 30$490

Rare Availability

7% of dates checked are available within 10% of the lowest price

Friday, November 21st, 2025

10 round-trip options

Returning

Wed, Nov 26, 2025•5 Day Trip

$1,618 USD

Google Flights

Returning

Thu, Nov 27, 2025•6 Day Trip

$1,794 USD

Google Flights

Returning

Fri, Nov 28, 2025•7 Day Trip

$2,550 USD

Google Flights

Returning

Sat, Nov 29, 2025•8 Day Trip

$2,525 USD

Google Flights

Returning

Sun, Nov 30, 2025•9 Day Trip

$2,912 USD

Google Flights

Returning

Mon, Dec 1, 2025•10 Day Trip

$2,005 USD

Google Flights

Returning

Tue, Dec 2, 2025•11 Day Trip

$2,149 USD

Google Flights

Returning

Wed, Dec 3, 2025•12 Day Trip

$1,615 USD

Google Flights

Returning

Thu, Dec 4, 2025•13 Day Trip

$1,601 USD

Google Flights

Returning

Fri, Dec 5, 2025•14 Day Trip

$2,629 USD

Google Flights