Bilbao

$450+ Cheap flights from Seattle (SEA) to Bilbao (BIO)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/22. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BIO
Nov 15 — Nov 221
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Cheap flight deals from Seattle to Bilbao

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 October 16, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$475
(Kiwi.com)

One-way from

$450
(Air Canada)

Popular in

June

Cheapest in

October

Average price

$731
Provider with most accurate pricing for Seattle/Tacoma Intl-Bilbao flight deals.
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Bilbao flights.
From Seattle/Tacoma Intl to Bilbao
One-way flight from Seattle/Tacoma Intl to Bilbao
Highest demand for flights based on searches. 15% potential increase in price ($195 potential increase over avg. RT price).
Cheapest flight prices on average. 3% potential price decrease ($41 potential savings vs. average RT price).
Average for round-trip flights in October 2025

Find flight deals from Seattle to Bilbao

Cheapest flights from Seattle to Bilbao
Explore the most affordable flight options available from Seattle to Bilbao. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 16, 2025.

This Kiwi.com deal was found by Cheapflights users on 10/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/242:00 pmSEA - BIO
1 stop17h 40mLufthansa
Tue 12/27:25 amBIO - SEA
2 stops35h 06mLufthansa
Deal found 10/15$475
This Mytrip deal was found by Cheapflights users on 10/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/3010:05 amSEA - BIO
2 stops23h 00mMultiple Airlines
Sun 12/76:45 amBIO - SEA
2 stops21h 31mMultiple Airlines
Deal found 10/16$482
This Mytrip deal was found by Cheapflights users on 10/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/2810:05 amSEA - BIO
2 stops28h 15mMultiple Airlines
Fri 12/56:45 amBIO - SEA
2 stops24h 21mMultiple Airlines
Deal found 10/14$494
This Booking.com deal was found by Cheapflights users on 10/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1810:05 amSEA - BIO
2 stops26h 50mLufthansa
Tue 11/257:40 amBIO - SEA
2 stops34h 51mLufthansa
Deal found 10/16$497
This Booking.com deal was found by Cheapflights users on 10/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/241:20 pmSEA - BIO
2 stops22h 35mMultiple Airlines
Tue 12/27:25 amBIO - SEA
2 stops35h 06mMultiple Airlines
Deal found 10/15$507
This Booking.com deal was found by Cheapflights users on 10/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/283:10 pmSEA - BIO
1 stop23h 10mLufthansa
Fri 12/56:45 amBIO - SEA
1 stop14h 25mLufthansa
Deal found 10/14$513

Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle to Bilbao that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated October 16, 2025.
Use the filters below to find and compare flights from Seattle to Bilbao that are best for you.

Fly from

Seattle

Fly to

Bilbao

Route

Depart

Return

Price

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Mon 11/24

2:00 pm-4:40 pm

1 stop17h 40m

Bilbao

Tue 12/2

7:25 am-9:31 am

2 stops35h 06m

$475

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Fri 11/28

10:05 am-11:20 pm

2 stops28h 15m

Bilbao

Fri 12/5

6:45 am-10:06 pm

2 stops24h 21m

$494

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Mon 11/24

8:10 am-4:40 pm

2 stops23h 30m

Bilbao

Tue 12/2

7:25 am-7:16 pm

2 stops20h 51m

$509

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Tue 11/18

2:00 pm-4:40 pm

1 stop17h 40m

Bilbao

Tue 11/25

7:40 am-9:31 am

2 stops34h 51m

$510

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Fri 11/28

3:10 pm-11:20 pm

1 stop23h 10m

Bilbao

Fri 12/5

6:45 am-12:10 pm

1 stop14h 25m

$513

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Tue 11/18

10:05 am-9:55 pm

2 stops26h 50m

Bilbao

Tue 11/25

6:45 am-10:06 pm

3 stops24h 21m

$518

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Sat 11/22

3:40 pm-6:05 pm

2 stops41h 25m

$450

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Sat 11/22

7:00 pm-11:00 am

1 stop31h 00m

$667

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Fri 11/21

12:59 am-3:15 pm

2 stops29h 16m

$777

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Sat 11/22

8:36 am-4:40 pm

3 stops23h 04m

$1,397

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/15

Compare providers for flights from Seattle to Bilbao

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Seattle to Bilbao in October.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*2 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Seattle-Bilbao flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Seattle-Bilbao flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Seattle-Bilbao flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Seattle-Bilbao flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Seattle-Bilbao flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Seattle to Bilbao

Have a flexible travel schedule? Discover the best time to fly to Bilbao from Seattle with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Seattle to Bilbao

What is the cheapest month to book a flight from Seattle to Bilbao?

Currently, October is the cheapest month in which you can book a flight from Seattle to Bilbao (average of $505). Flying from Seattle to Bilbao in June is currently the most expensive (average of $1,288). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from SEA to BIO?

Find hourly flight availability from Seattle to Bilbao. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 16, 2025.

It’s optimal to fly from Seattle to Bilbao in the evening. By choosing this option you can save up to 48% on the cost of your flight, compared to a flight at noon.

Reviews of airlines servicing Bilbao

Get insights into the airlines that provide service to Bilbao. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Bilbao. Reviews last updated October 16, 2025.
Peruse reviews from past customers who have flown with Delta, KLM, and United Airlines from Seattle to Bilbao to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

7.9

Comfort

7.9

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

7.9

Comfort

7.9

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

7.9

Comfort

7.9

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

7.9

Comfort

7.9

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

7.9

Comfort

7.9

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.

Related info for your journey

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.
  • How long is the flight from Seattle to Bilbao?

    There are many flights that can get you from Seattle to Bilbao in 17h 40m. Fly via Lufthansa to get the fastest option. Seattle and Bilbao are separated by a distance of 5159 mi.

  • What are the cheapest airlines flying from Seattle to Bilbao round-trip?

    Cheapflights users have booked flights from Seattle to Bilbao round-trip from $596. Other airlines that can offer you cheap pricing are Lufthansa, from $679, and KLM, from $701. United Airlines is 43% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the cheapest airlines to fly from Seattle to Bilbao one-way?

    The cheapest airlines for a one-way flight from Seattle to Bilbao are Air Canada ($450), Turkish Airlines ($667), and Aer Lingus ($777).

  • Can I find deals for flights from Seattle to Bilbao that include hotel bookings?

    Yes. In addition to deals on Seattle to Bilbao flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Seattle to Bilbao?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Bilbao.

  • Can I find deals for business class flights from Seattle to Bilbao?

    Yes. Cheapflights offers flight deals from Seattle to Bilbao by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Seattle to Bilbao?

    Currently, October is the cheapest month in which you can book a flight from Seattle to Bilbao (average of $505). Flying from Seattle to Bilbao in June is currently the most expensive (average of $1,288). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Alternative routes for Seattle to Bilbao

See prices for flight routes from nearby airports that may be better suited for you.

Top 4 airlines flying from Seattle to Bilbao

Discover the top 4 airlines that operate flights from Seattle to Bilbao. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated October 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$596Average$1,068FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$679Average$1,045FlexibilityNo cancel feeOn-time76%
KLMCheapest$701Average$1,075FlexibilityNo cancel feeOn-time75%
DeltaCheapest$730Average$1,080FlexibilityNo cancel feeOn-timeN/A

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