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Bilbao

$313+ 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 5/31. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BIO
Apr 15 — Apr 221
Wed 4/15
Wed 4/22
1 adult, Economy
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Cheap 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 March 16, 2026.

This FlightHub deal was found by Cheapflights users on 3/11. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/27:00 am
SEA
-
BIO
2 stops43h 35m
Scandinavian Airlines
Fri 5/227:35 pm
BIO
-
SEA
1 stop27h 10m
Scandinavian Airlines
Deal found 3/11$540
This Cheapflightsfares deal was found by Cheapflights users on 3/15. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/296:50 pm
SEA
-
BIO
1 stop14h 05m
Lufthansa
Fri 10/166:45 am
BIO
-
SEA
1 stop14h 35m
Lufthansa
Deal found 3/15$598
This Cheapflightsfares deal was found by Cheapflights users on 3/14. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/66:50 pm
SEA
-
BIO
1 stop19h 35m
Lufthansa
Tue 9/296:50 am
BIO
-
SEA
1 stop14h 05m
Lufthansa
Deal found 3/14$626
This United Airlines deal was found by Cheapflights users on 3/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/98:00 am
SEA
-
BIO
2 stops30h 05m
United Airlines
Fri 11/136:45 am
BIO
-
SEA
1 stop14h 25m
United Airlines
Deal found 3/11$632
This FlightHub deal was found by Cheapflights users on 3/13. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/113:10 pm
SEA
-
BIO
1 stop22h 55m
Multiple Airlines
Mon 11/1611:35 am
BIO
-
SEA
2 stops39h 51m
Multiple Airlines
Deal found 3/13$639

Find 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 March 16, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$540
(FlightHub)

One-way from

$313
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$654
Provider with most accurate pricing for Seattle/Tacoma Intl-Bilbao flight deals.
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Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Bilbao flights.
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From Seattle/Tacoma Intl to Bilbao
Search Deals
One-way flight from Seattle/Tacoma Intl to Bilbao
Search Deals
Highest demand for flights based on searches. 21% potential increase in price ($262 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($46 potential savings vs. average RT price).
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Average for round-trip flights in March 2026
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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 March 16, 2026.
Use the filters below to find and compare flights from Seattle to Bilbao that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Sat 5/2

7:00 am-11:35 am

2 stops43h 35m

Bilbao

Fri 5/22

7:35 pm-1:45 pm

1 stop27h 10m

$540

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Tue 3/31

7:10 pm-5:20 pm

1 stop37h 10m

Bilbao

Tue 4/7

12:10 pm-5:15 pm

1 stop38h 05m

$678

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Sat 4/25

7:10 pm-11:10 am

1 stop31h 00m

Bilbao

Wed 4/29

6:20 pm-5:15 pm

1 stop31h 55m

$692

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Thu 4/9

3:40 pm-11:25 pm

2 stops22h 45m

Bilbao

Wed 4/15

6:50 am-10:42 pm

2 stops24h 52m

$708

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Fri 4/24

8:00 am-5:55 pm

2 stops24h 55m

Bilbao

Wed 4/29

6:50 am-12:20 pm

1 stop14h 30m

$743

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Thu 4/9

7:12 am-11:25 pm

2 stops31h 13m

Bilbao

Wed 4/15

6:50 am-11:27 pm

3 stops25h 37m

$753

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Tue 3/31

7:10 pm-5:20 pm

1 stop37h 10m

Bilbao

Tue 4/7

9:05 pm-5:15 pm

2 stops29h 10m

$777
Quickest round-trip

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Sat 5/2

7:15 am-11:15 am

2 stops19h 00m

Bilbao

Fri 5/22

6:45 am-4:01 pm

2 stops18h 16m

$786

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Sat 4/25

7:10 pm-7:35 am

2 stops27h 25m

Bilbao

Wed 4/29

6:20 pm-5:15 pm

1 stop31h 55m

$815
Cheapest one-way

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Sat 5/30

3:40 pm-8:05 pm

3 stops43h 25m

$315

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/13

Showing 1-10 of 18 resultsSorted by cheapest first
1
2

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 March.
ProviderPrice AccuracyTrust Score*
OvagoPrice Accuracy2 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*2 stars
FlightHubPrice Accuracy3 starsTrust Score*3 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.

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 March 16, 2026.
Peruse reviews from past customers who have flown with Delta,KLM, andUnited 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.
Delta
7.9
Good
8,289 reviews

Entertainment

7.8

Comfort

7.9

Overall

7.9

Boarding

8.1

Crew

8.5

Food

7.2

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,289 reviews
Delta
7.9
Good
8,289 reviews

Entertainment

7.8

Comfort

7.9

Overall

7.9

Boarding

8.1

Crew

8.5

Food

7.2

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
KLM
7.8
Good
1,471 reviews
Delta
7.9
Good
8,289 reviews

Entertainment

7.8

Comfort

7.9

Overall

7.9

Boarding

8.1

Crew

8.5

Food

7.2

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
United Airlines
7.4
Good
9,429 reviews
Delta
7.9
Good
8,289 reviews

Entertainment

7.8

Comfort

7.9

Overall

7.9

Boarding

8.1

Crew

8.5

Food

7.2

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Lufthansa
6.8
Okay
7,854 reviews
Delta
7.9
Good
8,289 reviews

Entertainment

7.8

Comfort

7.9

Overall

7.9

Boarding

8.1

Crew

8.5

Food

7.2

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

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 22h 45m. Fly via Scandinavian Airlines, Turkish Airlines, or Lufthansa to get the fastest option. Seattle and Bilbao are separated by a distance of 5159 mi. This flight may include one or multiple stops.

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

    Cheapflights users have booked flights from Seattle to Bilbao round-trip from $484. Other airlines that can offer you cheap pricing are United Airlines, from $484, and KLM, from $586. Lufthansa is 49% cheaper than the average price of flights available within the next 90 days to this destination.

  • 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.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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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 March 16, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$484Average$939FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$484Average$898FlexibilityNo cancel feeOn-time76%
KLMCheapest$586Average$1,088FlexibilityNo cancel feeOn-time75%
DeltaCheapest$654Average$1,069FlexibilityNo cancel feeOn-timeN/A

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