Chicago (ORD) to Bilbao (BIO) flight deal in economy from $735
$969 USD
-24%$735 USD
Verified 2 days agoDecember 2026
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Fair Availability
29% of dates checked are available within 10% of the lowest price
Monday, December 14th, 2026
2 round-trip options
Returning
Sat, Dec 19, 2026•5 Day Trip
$1,128 USD
Returning
Thu, Dec 24, 2026•10 Day Trip
$794 USD