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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
$582 USD
-23%
$449
USD
Verified Nov 25, 2025 at 8:18 PM
April 2026
Today
Mon
Tue
Wed
Thu
Fri
Sat
Sun
30
$517
31
$517
1
$517
2
$589
3
$589
4
$576
5
$529
6
$517
7
$517
8
$517
9
$589
10
$576
11
$538
12
$517
13
$517
14
$517
15
$517
16
$589
17
$576
18
$576
19
$517
20
$509
21
$517
22
$517
23
$589
24
$576
25
$576
26
$517
27
$517
28
$517
29
$519
30
$589
1
2
3
Fair Availability
32% of dates checked are available within 10% of the lowest price
Wednesday, April 1st, 2026
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