Chicago (ORD) to Bilbao (BIO) flight deal in economy from $735
$969 USD
-24%$735 USD
Verified 1 day agoDecember 2026
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Fair Availability
29% of dates checked are available within 10% of the lowest price
Friday, December 18th, 2026
2 round-trip options
Returning
Wed, Dec 23, 2026•5 Day Trip
$1,048 USD
Returning
Mon, Dec 28, 2026•10 Day Trip
$1,123 USD