Bilbao (BIO) to San Francisco (SFO) flight deal in economy from $505
$802 USD
-37%$505 USD
Verified 13 days agoOctober 2026
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Limited Availability
11% of dates checked are available within 10% of the lowest price
Monday, October 19th, 2026
2 round-trip options
Returning
Tue, Oct 27, 2026•8 Day Trip
$613 USD
Returning
Mon, Nov 2, 2026•14 Day Trip
$890 USD