Chicago (ORD) to Bilbao (BIO) flight deal in economy from $735
$969 USD
-24%$735 USD
Verified 1 day agoDecember 2026
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Fair Availability
29% of dates checked are available within 10% of the lowest price
Tuesday, December 15th, 2026
2 round-trip options
Returning
Sun, Dec 20, 2026•5 Day Trip
$980 USD
Returning
Fri, Dec 25, 2026•10 Day Trip
$796 USD