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Bilbao

$243+ 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 4/26. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BIO
Feb 28 — Mar 71
Sat 2/28
Sat 3/7
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 January 29, 2026.

This Delta deal was found by Cheapflights users on 1/27. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/12:10 pm
SEA
-
BIO
1 stop18h 10m
Delta
Mon 3/166:50 am
BIO
-
SEA
1 stop13h 45m
Delta
Deal found 1/27$473
This Mytrip deal was found by Cheapflights users on 1/27. 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 3/18:00 am
SEA
-
BIO
2 stops25h 05m
Multiple Airlines
Mon 3/165:35 pm
BIO
-
SEA
1 stop27h 35m
Multiple Airlines
Deal found 1/27$483
This Cheapflightsfares deal was found by Cheapflights users on 1/27. 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.
Mon 10/192:15 pm
SEA
-
BIO
2 stops24h 10m
Lufthansa
Fri 10/306:45 am
BIO
-
SEA
1 stop14h 25m
Lufthansa
Deal found 1/27$493
This American Airlines deal was found by Cheapflights users on 1/27. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/15:37 am
SEA
-
BIO
2 stops17h 53m
American Airlines
Mon 3/169:15 am
BIO
-
SEA
2 stops23h 09m
American Airlines
Deal found 1/27$500
This Gotogate deal was found by Cheapflights users on 1/29. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/283:00 pm
SEA
-
BIO
1 stop23h 50m
Multiple Airlines
Mon 11/96:50 pm
BIO
-
SEA
2 stops52h 41m
Multiple Airlines
Deal found 1/29$532
This United Airlines deal was found by Cheapflights users on 1/27. 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.
Fri 2/273:10 pm
SEA
-
BIO
1 stop23h 10m
United Airlines
Tue 3/36:45 am
BIO
-
SEA
3 stops23h 16m
United Airlines
Deal found 1/27$534
This Cheapflightsfares deal was found by Cheapflights users on 1/29. 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.
Wed 10/287:00 am
SEA
-
BIO
2 stops21h 00m
Lufthansa
Mon 11/96:50 pm
BIO
-
SEA
2 stops26h 20m
Lufthansa
Deal found 1/29$538

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 January 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$473
(Delta)

One-way from

$243
(Cheapflightsfares)

Popular in

June

Cheapest in

January

Average price

$484
Provider with most accurate pricing for Seattle/Tacoma Intl-Bilbao flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Bilbao flights.
Search Deals
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. 17% potential increase in price ($214 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($44 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

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 January 29, 2026.
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

Sun 3/1

2:10 pm-5:20 pm

1 stop18h 10m

Bilbao

Mon 3/16

6:50 am-12:35 pm

1 stop13h 45m

$473

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Fri 2/27

3:10 pm-11:20 pm

1 stop23h 10m

Bilbao

Tue 3/3

6:45 am-9:01 pm

3 stops23h 16m

$534

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Sat 5/2

11:14 pm-5:00 pm

2 stops32h 46m

Bilbao

Fri 5/22

6:50 am-12:20 pm

1 stop14h 30m

$540

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Fri 4/3

5:50 am-5:55 pm

2 stops27h 05m

Bilbao

Mon 4/13

6:40 pm-12:20 pm

2 stops26h 40m

$615

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Sun 4/26

6:50 pm-11:25 pm

1 stop19h 35m

$243

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Sun 4/26

7:00 am-12:45 pm

2 stops20h 45m

$252

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Sun 4/26

6:55 pm-5:30 pm

1 stop13h 35m

$331

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Wed 7/15

9:55 am-7:55 pm

2 stops25h 00m

$362

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Wed 7/1

6:57 am-5:15 pm

2 stops25h 18m

$378

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Thu 6/11

6:50 pm-5:55 pm

1 stop14h 05m

$413

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/26

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 January.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*3 stars
AranGrantPrice 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, January is the cheapest month in which you can book a flight from Seattle to Bilbao (average of $484). 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.

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 January 29, 2026.
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.
Delta
7.9
Good
8,127 reviews

Overall

7.9

Food

7.2

Boarding

8.1

Comfort

7.9

Crew

8.5

Entertainment

7.8

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
8,127 reviews
Delta
7.9
Good
8,127 reviews

Overall

7.9

Food

7.2

Boarding

8.1

Comfort

7.9

Crew

8.5

Entertainment

7.8

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
7.7
Good
1,443 reviews
Delta
7.9
Good
8,127 reviews

Overall

7.9

Food

7.2

Boarding

8.1

Comfort

7.9

Crew

8.5

Entertainment

7.8

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
9,215 reviews
Delta
7.9
Good
8,127 reviews

Overall

7.9

Food

7.2

Boarding

8.1

Comfort

7.9

Crew

8.5

Entertainment

7.8

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
7,756 reviews
Delta
7.9
Good
8,127 reviews

Overall

7.9

Food

7.2

Boarding

8.1

Comfort

7.9

Crew

8.5

Entertainment

7.8

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 18h 10m. Fly via Delta or United Airlines 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 52% 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.

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

    Currently, January is the cheapest month in which you can book a flight from Seattle to Bilbao (average of $484). 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.
Seattle to San Sebastian flights
Portland to Bilbao flights
Pasco to Bilbao flights

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 January 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$484Average$939FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$484Average$899FlexibilityNo cancel feeOn-time76%
KLMCheapest$586Average$1,075FlexibilityNo cancel feeOn-time75%
DeltaCheapest$731Average$1,110FlexibilityNo cancel feeOn-timeN/A

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