Seattle / Tacoma (SEA) to Bilbao (BIO) flight deal in economy from $612
SEASeattle–Tacoma International Airport
Seattle / Tacoma, United States
BIOBilbao Airport
Bilbao, Spain
$862 USD
-29%$612 USD
Verified about 5 hours agoDecember 2026
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Fair Availability
36% of dates checked are available within 10% of the lowest price
Thursday, December 17th, 2026
10 round-trip options
Returning
Tue, Dec 22, 2026•5 Day Trip
$1,431 USD
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Wed, Dec 23, 2026•6 Day Trip
$1,661 USD
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Thu, Dec 24, 2026•7 Day Trip
$1,431 USD
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Fri, Dec 25, 2026•8 Day Trip
$1,564 USD
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Sat, Dec 26, 2026•9 Day Trip
$1,708 USD
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Sun, Dec 27, 2026•10 Day Trip
$1,898 USD
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Mon, Dec 28, 2026•11 Day Trip
$1,808 USD
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Tue, Dec 29, 2026•12 Day Trip
$1,838 USD
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Wed, Dec 30, 2026•13 Day Trip
$1,986 USD
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Thu, Dec 31, 2026•14 Day Trip
$1,845 USD