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AC
Air Canada
LH
Lufthansa
LX
Swiss International Air Lines
OS
Austrian Airlines
UA
United Airlines
One Way
•
Economy
SFO
San Francisco International Airport
San Francisco, United States
BIO
Bilbao Airport
Bilbao, Spain
$509 USD
-13%
$445
USD
Verified Oct 16, 2025 at 5:59 AM
November 2025
Today
Mon
Tue
Wed
Thu
Fri
Sat
Sun
27
$495
28
$495
29
$495
30
$498
31
$498
1
$688
2
$448
3
$448
4
$448
5
$448
6
$472
7
$498
8
$448
9
$448
10
$448
11
$448
12
$448
13
$445
14
$445
15
$445
16
$472
17
$445
18
$445
19
$449
20
$592
21
$854
22
$445
23
$445
24
$445
25
$445
26
$445
27
$445
28
$445
29
$445
30
$445
Great Availability
62% of dates checked are available within 10% of the lowest price
Wednesday, November 26th, 2025
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