
Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Bilbao (BIO). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated November 10, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $720 (United Airlines) |
One-way from | $495 (Cheapflightsfares) |
Popular in | November |
Cheapest in | January |
Average price | $1,485 |
Fly from
Fly to
Route
Depart
Return
SeattleBilbao
SEA Seattle/Tacoma Intl - BIO Bilbao
SEABIO
Seattle/Tacoma Intl
Tue 2/9
10:50 pm-5:45 pm
2 stops33h 55m
Bilbao
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
SeattleBilbao
SEA Seattle/Tacoma Intl - BIO Bilbao
SEABIO
Seattle/Tacoma Intl
Fri 12/11
11:39 pm-3:15 pm
2 stops30h 36m
Bilbao
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
SeattleBilbao
SEA Seattle/Tacoma Intl - BIO Bilbao
SEABIO
Seattle/Tacoma Intl
Wed 12/23
11:58 pm-9:55 pm
2 stops36h 57m
Bilbao
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
SeattleBilbao
SEA Seattle/Tacoma Intl - BIO Bilbao
SEABIO
Seattle/Tacoma Intl
Fri 12/11
7:05 am-10:35 pm
3 stops30h 30m
Bilbao
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
SeattleBilbao
SEA Seattle/Tacoma Intl - BIO Bilbao
SEABIO
Seattle/Tacoma Intl
Sun 2/7
2:50 pm-9:55 pm
1 stop22h 05m
Bilbao
Thu 2/11
6:45 am-12:00 pm
1 stop14h 15m
SeattleBilbao
SEA Seattle/Tacoma Intl - BIO Bilbao
SEABIO
Seattle/Tacoma Intl
Sat 4/10
3:15 pm-5:05 pm
2 stops40h 50m
Bilbao
Sat 4/17
6:40 pm-5:20 pm
1 stop31h 40m
SeattleBilbao
SEA Seattle/Tacoma Intl - BIO Bilbao
SEABIO
Seattle/Tacoma Intl
Wed 4/7
7:00 pm-9:20 pm
2 stops17h 20m
Bilbao
Sat 4/17
7:00 am-2:40 pm
3 stops40h 40m
SeattleBilbao
SEA Seattle/Tacoma Intl - BIO Bilbao
SEABIO
Seattle/Tacoma Intl
Thu 4/8
2:10 pm-1:25 pm
1 stop14h 15m
Bilbao
Sat 4/17
11:55 am-10:00 pm
2 stops19h 05m
SeattleBilbao
SEA Seattle/Tacoma Intl - BIO Bilbao
SEABIO
Seattle/Tacoma Intl
Wed 1/6
2:50 pm-5:45 pm
1 stop17h 55m
Bilbao
Mon 1/18
11:45 am-9:59 pm
2 stops43h 14m
SeattleBilbao
SEA Seattle/Tacoma Intl - BIO Bilbao
SEABIO
Seattle/Tacoma Intl
Tue 1/5
8:08 am-9:55 pm
2 stops28h 47m
Bilbao
Mon 1/18
11:45 am-1:13 pm
3 stops58h 28m
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
Entertainment
Boarding
Crew
Food
Comfort
Overall
Reviews
Kushal,Sep 2026
QRO - ATL
Entertainment
Boarding
Crew
Food
Comfort
Overall
Reviews
Kushal,Sep 2026
QRO - ATL
Entertainment
Boarding
Crew
Food
Comfort
Overall
Reviews
Kushal,Sep 2026
QRO - ATL
Entertainment
Boarding
Crew
Food
Comfort
Overall
Reviews
Kushal,Sep 2026
QRO - ATL
Entertainment
Boarding
Crew
Food
Comfort
Overall
Reviews
Kushal,Sep 2026
QRO - ATL
Find useful and relevant information for your journey from Seattle to Bilbao. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$484 | Average$939 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$581 | Average$963 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$654 | Average$975 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$683 | Average$896 | FlexibilityNo cancel fee | On-time76% |