Chicago (ORD) to Bilbao (BIO) flight deal in economy from $735
$969 USD
-24%$735 USD
Verified 1 day agoAugust 2026
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Fair Availability
29% of dates checked are available within 10% of the lowest price
Monday, August 31st, 2026
3 round-trip options
Returning
Sat, Sep 5, 2026•5 Day Trip
$1,616 USD
Returning
Sun, Sep 6, 2026•6 Day Trip
$937 USD
Returning
Mon, Sep 7, 2026•7 Day Trip
$898 USD