Bilbao (BIO) to Chicago (ORD) cheap flight deal from $391 USD in economy class

AAAmerican Airlines

AYFinnair

Bilbao Airport

Bilbao, Spain

ORD

O'Hare International Airport

Chicago, United States

$834 USD

-53%$391 USD

Verified Sep 21, 2025 at 4:34 PM

October 2025

Today

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29$1,071 30$919 1$649 2$535 3$508 4$1,126 5$595 6$450 7$450 8$450 9$450 10$467 11$807 12$820 13$783 14$713 15$652 16$526 17$620 18$937 19$878 20$643 21$450 22$450 23$602 24$714 25$1,113 26$989 27$928 28$649 29$1,101 30$748 31$597 1 2

Extremely Rare Availability

1% of dates checked are available within 10% of the lowest price

Saturday, October 11th, 2025

6 round-trip options

Returning

Thu, Oct 16, 2025•5 Day Trip

$820 USD

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Returning

Fri, Oct 17, 2025•6 Day Trip

$884 USD

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Returning

Sat, Oct 18, 2025•7 Day Trip

$824 USD

Google Flights

Returning

Sun, Oct 19, 2025•8 Day Trip

$824 USD

Google Flights

Returning

Mon, Oct 20, 2025•9 Day Trip

$807 USD

Google Flights

Returning

Fri, Oct 24, 2025•13 Day Trip

$837 USD

Google Flights