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 3 hours agoSeptember 2026
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Fair Availability
36% of dates checked are available within 10% of the lowest price
Friday, September 18th, 2026
0 round-trip options
No flight details available for this date.