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$635+ Cheap flights from Bilbao (BIO) to Seattle (SEA)

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 9/7. Fares are subject to change and may not be available on all flights or dates of travel.
BIO — SEA
Aug 4 — Aug 111
Mon 8/4
Mon 8/11
1 adult, Economy
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Cheap flight deals from Bilbao to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Bilbao (BIO) to Seattle (SEA). 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 July 30, 2025.

Round-trip from

$776
(lol.travel)

One-way from

$434
(Kiwi.com)

Popular in

July

Cheapest in

February

Average price

$1,220
From Bilbao to Seattle/Tacoma Intl
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One-way flight from Bilbao to Seattle/Tacoma Intl
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Highest demand for flights based on searches. 15% potential increase in price ($184 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($23 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Find flight deals from Bilbao to Seattle

Cheapest flights from Bilbao to Seattle
Explore the most affordable flight options available from Bilbao to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 30, 2025.

This lol.travel deal was found by Cheapflights users on 7/29. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/286:45 amBIO - SEA
1 stop14h 10mUnited Airlines
Fri 9/266:50 pmSEA - BIO
1 stop19h 35mUnited Airlines
Deal found 7/29$776
This Gotogate deal was found by Cheapflights users on 7/29. 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.
Mon 9/812:05 pmBIO - SEA
1 stop38h 10mTurkish Airlines
Sat 9/1312:30 pmSEA - BIO
1 stop37h 35mTurkish Airlines
Deal found 7/29$887
This Trip.com deal was found by Cheapflights users on 7/29. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/86:55 amBIO - SEA
2 stops22h 45mMultiple Airlines
Sat 9/133:45 pmSEA - BIO
2 stops17h 50mMultiple Airlines
Deal found 7/29$902
This Delta deal was found by Cheapflights users on 7/30. 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.
Sat 8/236:50 amBIO - SEA
1 stop13h 45mDelta
Thu 9/251:30 pmSEA - BIO
1 stop18h 10mDelta
Deal found 7/30$980
This American Airlines deal was found by Cheapflights users on 7/29. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/136:45 amBIO - SEA
2 stops25h 33mAmerican Airlines
Sun 11/1612:59 amSEA - BIO
2 stops26h 51mAmerican Airlines
Deal found 7/29$1,044
This Gotogate deal was found by Cheapflights users on 7/30. 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.
Tue 8/56:45 amBIO - SEA
2 stops16h 31mAir Canada
Tue 8/57:15 pmSEA - BIO
2 stops37h 35mAir Canada
Deal found 7/30$2,121
This TAP AIR PORTUGAL deal was found by Cheapflights users on 7/29. 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 TAP AIR PORTUGAL is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/712:15 pmBIO - SEA
2 stops31h 05mTAP AIR PORTUGAL
Mon 8/1111:30 amSEA - BIO
3 stops21h 30mTAP AIR PORTUGAL
Deal found 7/29$2,597

Cheapflights Fare Finder

 
Customize your flight search to find flights from Bilbao to Seattle 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 July 30, 2025.
Use the filters below to find and compare flights from Bilbao to Seattle that are best for you.

Fly from

Bilbao

Fly to

Seattle

Route

Depart

Return

Price

BilbaoSeattle

BIO - SEA

BIOSEA

Bilbao

Thu 8/28

6:45 am-11:55 am

1 stop14h 10m

Seattle/Tacoma Intl

Fri 9/26

6:50 pm-11:25 pm

1 stop19h 35m

$776

BilbaoSeattle

BIO - SEA

BIOSEA

Bilbao

Mon 9/8

12:05 pm-5:15 pm

1 stop38h 10m

Seattle/Tacoma Intl

Sat 9/13

12:30 pm-11:05 am

1 stop37h 35m

$887

BilbaoSeattle

BIO - SEA

BIOSEA

Bilbao

Mon 9/8

6:55 am-8:40 pm

2 stops22h 45m

Seattle/Tacoma Intl

Sat 9/13

3:45 pm-6:35 pm

2 stops17h 50m

$902

BilbaoSeattle

BIO - SEA

BIOSEA

Bilbao

Sat 8/23

6:50 am-11:35 am

1 stop13h 45m

Seattle/Tacoma Intl

Thu 9/25

1:30 pm-4:40 pm

1 stop18h 10m

$980

BilbaoSeattle

BIO - SEA

BIOSEA

Bilbao

Thu 11/13

6:45 am-11:18 pm

2 stops25h 33m

Seattle/Tacoma Intl

Sun 11/16

12:59 am-12:50 pm

2 stops26h 51m

$1,044

BilbaoSeattle

BIO - SEA

BIOSEA

Bilbao

Sun 9/7

6:30 pm-5:15 pm

1 stop31h 45m

$635

BilbaoSeattle

BIO - SEA

BIOSEA

Bilbao

Sun 9/7

6:45 am-6:36 pm

2 stops20h 51m

$694

BilbaoSeattle

BIO - SEA

BIOSEA

Bilbao

Sun 9/7

9:05 am-6:36 pm

2 stops18h 31m

$730

BilbaoSeattle

BIO - SEA

BIOSEA

Bilbao

Wed 8/13

9:15 am-4:59 pm

2 stops16h 44m

$4,327

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

Best time to book a flight from Bilbao to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Bilbao 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 Seattle

Get insights into the airlines that provide service to Seattle. 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 Seattle. Reviews last updated July 30, 2025.
Read reviews from past customers who have flown Delta, KLM, and Air France from Bilbao to Seattle. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,980 reviews

Food

7.3

Comfort

7.9

Boarding

8.2

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Delta
8.0
Very good
7,980 reviews
Delta
8.0
Very good
7,980 reviews

Food

7.3

Comfort

7.9

Boarding

8.2

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
KLM
7.8
Good
1,383 reviews
Delta
8.0
Very good
7,980 reviews

Food

7.3

Comfort

7.9

Boarding

8.2

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Air France
7.5
Good
1,465 reviews
Delta
8.0
Very good
7,980 reviews

Food

7.3

Comfort

7.9

Boarding

8.2

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
SWISS
7.5
Good
1,686 reviews
Delta
8.0
Very good
7,980 reviews

Food

7.3

Comfort

7.9

Boarding

8.2

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
United Airlines
7.4
Good
8,896 reviews
Delta
8.0
Very good
7,980 reviews

Food

7.3

Comfort

7.9

Boarding

8.2

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.

Related info for your journey

Find useful and relevant information for your journey from Bilbao to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

    According to our current data, United Airlines ($776), Turkish Airlines ($887), and Delta ($980) offers the cheapest pricing from Bilbao to Seattle. United Airlines is 22% cheaper than the average price of flights available within the next 90 days to this destination.

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

    $584 is the cheapest one-way deal found within the past few days, from Aer Lingus. You may also be able to find cheap deals on Turkish Airlines and Lufthansa, with prices starting from $635 and $694, respectively.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Bilbao to Seattle 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 Bilbao to Seattle?

    Currently, January is the cheapest month in which you can book a flight from Bilbao to Seattle (average of $238). Flying from Bilbao to Seattle in June is currently the most expensive (average of $389). 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

Traveling to a place near Seattle?

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