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 29th, 2026
2 round-trip options
Returning
Sun, Jan 3, 2027•5 Day Trip
$1,741 USD
Returning
Fri, Jan 8, 2027•10 Day Trip
$915 USD