Bilbao

$340+ 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 9/27. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BIO
Jun 10 — Jun 171
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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 May 11, 2026.

This Gotogate deal was found by Cheapflights users on 5/7. 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 10/142:10 pm
SEA
-
BIO
1 stop18h 05m
Multiple Airlines
Fri 10/236:45 am
BIO
-
SEA
2 stops24h 57m
Multiple Airlines
Deal found 5/7$711
This FlightHub deal was found by Cheapflights users on 5/7. 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 10/146:50 pm
SEA
-
BIO
1 stop19h 35m
Lufthansa
Fri 10/236:45 am
BIO
-
SEA
1 stop14h 35m
Lufthansa
Deal found 5/7$728
This United Airlines deal was found by Cheapflights users on 5/7. 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.
Wed 10/143:30 pm
SEA
-
BIO
2 stops22h 55m
United Airlines
Fri 10/236:45 am
BIO
-
SEA
2 stops24h 57m
United Airlines
Deal found 5/7$733
This United Airlines deal was found by Cheapflights users on 5/8. 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 11/168:00 am
SEA
-
BIO
2 stops30h 05m
United Airlines
Thu 11/196:45 am
BIO
-
SEA
1 stop14h 25m
United Airlines
Deal found 5/8$734
This Gotogate deal was found by Cheapflights users on 5/7. 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 9/162:10 pm
SEA
-
BIO
1 stop23h 15m
Multiple Airlines
Wed 9/306:50 am
BIO
-
SEA
2 stops16h 32m
Multiple Airlines
Deal found 5/7$746
This FlightHub deal was found by Cheapflights users on 5/7. 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.
Sun 9/66:50 pm
SEA
-
BIO
1 stop19h 35m
Multiple Airlines
Tue 9/298:55 pm
BIO
-
SEA
2 stops30h 37m
Multiple Airlines
Deal found 5/7$755
This Air France deal was found by Cheapflights users on 5/9. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/166:40 pm
SEA
-
BIO
1 stop18h 20m
Multiple Airlines
Thu 8/2012:00 pm
BIO
-
SEA
1 stop32h 37m
Multiple Airlines
Deal found 5/9$757
This FlightHub deal was found by Cheapflights users on 5/7. 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 9/166:50 pm
SEA
-
BIO
1 stop19h 35m
Lufthansa
Wed 9/306:50 am
BIO
-
SEA
1 stop14h 05m
Lufthansa
Deal found 5/7$758
This United Airlines deal was found by Cheapflights users on 5/7. 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.
Wed 9/163:33 pm
SEA
-
BIO
2 stops22h 52m
United Airlines
Wed 9/306:50 am
BIO
-
SEA
2 stops16h 32m
United Airlines
Deal found 5/7$763
This United Airlines deal was found by Cheapflights users on 5/9. 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.
Sun 8/165:00 am
SEA
-
BIO
2 stops27h 55m
United Airlines
Thu 8/2011:55 am
BIO
-
SEA
1 stop14h 04m
United Airlines
Deal found 5/9$765
This Cheapflightsfares deal was found by Cheapflights users on 5/9. 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 9/11:57 pm
SEA
-
BIO
2 stops24h 08m
Lufthansa
Tue 9/811:55 am
BIO
-
SEA
1 stop14h 04m
Lufthansa
Deal found 5/9$768

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 May 11, 2026.

Most accurate provider

Ovago
3 stars

Most trusted provider

Ovago
3 stars

Round-trip from

$711
(Gotogate)

One-way from

$340
(Gotogate)

Popular in

July

Cheapest in

January

Average price

$1,024
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. 20% potential increase in price ($245 potential increase over avg. RT price).
Cheapest flight prices on average. 3% potential price decrease ($36 potential savings vs. average RT price).
Average for round-trip flights in May 2026

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 May 11, 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
Quickest round-trip

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Sun 10/11

2:10 pm-1:20 pm

1 stop14h 10m

Bilbao

Wed 10/14

6:50 am-12:20 pm

1 stop14h 30m

$741

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Mon 9/28

2:10 pm-10:25 pm

1 stop23h 15m

Bilbao

Sat 10/17

6:50 am-9:52 am

2 stops36h 02m

$791

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Tue 9/1

2:06 pm-11:15 pm

2 stops24h 09m

Bilbao

Tue 9/8

6:45 am-11:50 pm

2 stops26h 05m

$811

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Wed 9/2

2:10 pm-10:25 pm

1 stop23h 15m

Bilbao

Mon 9/21

6:40 pm-4:59 pm

1 stop31h 19m

$833

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Mon 8/31

11:04 pm-5:55 pm

2 stops33h 51m

Bilbao

Sun 9/13

6:50 am-10:42 pm

2 stops24h 52m

$855

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Sun 8/30

6:50 pm-11:25 pm

1 stop19h 35m

Bilbao

Sat 9/12

6:50 am-11:55 am

1 stop14h 05m

$896

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Fri 9/4

6:50 pm-11:25 pm

1 stop19h 35m

Bilbao

Sun 9/20

7:40 am-4:59 pm

1 stop18h 19m

$901

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Mon 8/31

6:40 pm-10:00 pm

1 stop18h 20m

Bilbao

Sun 9/13

7:10 am-11:15 am

1 stop13h 05m

$902

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Mon 8/31

7:20 am-11:15 am

2 stops18h 55m

Bilbao

Sun 9/13

7:10 am-11:15 am

1 stop13h 05m

$911
Cheapest one-way

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Sun 9/27

6:50 pm-11:25 pm

1 stop19h 35m

$340

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/8

Showing 1-10 of 21 resultsSorted by cheapest first
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2
3

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 May.
ProviderPrice AccuracyTrust Score*
OvagoPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice 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 Ovago to be most consistent on Cheapflights vs. Ovago Users can find the same prices on Seattle-Bilbao flight deals on Cheapflights vs. Ovago >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 Ovago the most. Ovago 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

How much does it cost to fly round-trip from Seattle to Bilbao?

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 May 11, 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.

Food

7.2

Crew

8.5

Boarding

8.1

Comfort

7.9

Entertainment

7.8

Overall

7.9

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional

Food

7.2

Crew

8.5

Boarding

8.1

Comfort

7.9

Entertainment

7.8

Overall

7.9

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional

Food

7.2

Crew

8.5

Boarding

8.1

Comfort

7.9

Entertainment

7.8

Overall

7.9

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional

Food

7.2

Crew

8.5

Boarding

8.1

Comfort

7.9

Entertainment

7.8

Overall

7.9

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional

Food

7.2

Crew

8.5

Boarding

8.1

Comfort

7.9

Entertainment

7.8

Overall

7.9

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional

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 14h 10m. Fly via United 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 Lufthansa, from $514, and KLM, from $586. United Airlines 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

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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 May 11, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$484Average$940FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$514Average$898FlexibilityNo cancel feeOn-time76%
KLMCheapest$586Average$1,220FlexibilityNo cancel feeOn-time75%
DeltaCheapest$731Average$1,051FlexibilityNo cancel feeOn-timeN/A

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