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$629+ 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
Apr 22 — Apr 291
Tue 4/22
Tue 4/29
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 April 17, 2025.

Round-trip from

$762
(Delta)

One-way from

$629
(Gurufare)

Popular in

August

Cheapest in

February

Average price

$1,169
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. 16% potential increase in price ($191 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($27 potential savings vs. average RT price).
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Average for round-trip flights in April 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 April 17, 2025.

This Delta deal was found by Cheapflights users on 4/17. 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.
Thu 5/16:50 amBIO - SEA
1 stop13h 50mDelta
Mon 5/57:23 amSEA - BIO
2 stops18h 02mDelta
Deal found 4/17$762
This United Airlines deal was found by Cheapflights users on 4/17. 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.
Thu 5/12:10 pmBIO - SEA
1 stop31h 15mUnited Airlines
Mon 5/52:15 pmSEA - BIO
1 stop14h 05mUnited Airlines
Deal found 4/17$853
This eDestinos deal was found by Cheapflights users on 4/17. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/226:30 pmBIO - SEA
1 stop31h 45mTurkish Airlines
Tue 7/2212:30 pmSEA - BIO
1 stop19h 55mTurkish Airlines
Deal found 4/17$1,066
This eDestinos deal was found by Cheapflights users on 4/17. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/227:10 amBIO - SEA
2 stops45h 02mMultiple Airlines
Tue 7/229:00 amSEA - BIO
3 stops38h 15mMultiple Airlines
Deal found 4/17$1,503

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 April 17, 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 5/1

6:50 am-11:40 am

1 stop13h 50m

Seattle/Tacoma Intl

Mon 5/5

7:23 am-10:25 am

2 stops18h 02m

$762

BilbaoSeattle

BIO - SEA

BIOSEA

Bilbao

Thu 5/1

2:10 pm-12:25 pm

1 stop31h 15m

Seattle/Tacoma Intl

Mon 5/5

2:15 pm-1:20 pm

1 stop14h 05m

$853

BilbaoSeattle

BIO - SEA

BIOSEA

Bilbao

Sun 6/22

6:30 pm-5:15 pm

1 stop31h 45m

Seattle/Tacoma Intl

Tue 7/22

12:30 pm-5:25 pm

1 stop19h 55m

$1,066

BilbaoSeattle

BIO - SEA

BIOSEA

Bilbao

Sun 6/22

7:10 am-7:12 pm

2 stops45h 02m

Seattle/Tacoma Intl

Tue 7/22

9:00 am-8:15 am

3 stops38h 15m

$1,503

BilbaoSeattle

BIO - SEA

BIOSEA

Bilbao

Sun 9/7

6:10 pm-5:50 pm

1 stop32h 40m

$629

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/17

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.

Cheapflights Insights

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

Rainfall in Seattle by month

Plan your trip to Seattle by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Seattle ranges from 0.7 - 6.6 inches per month. November is typically the wettest month, when rainfall can reach 6.6 in. July is typically the driest time to visit Seattle when rainfall is around 0.7 in.

Temperature in Seattle by month

Plan your trip to Seattle by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Seattle, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 66.2 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 41.0 F).

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 April 17, 2025.
Delta
8.0
Very good
7,917 reviews

Crew

8.5

Entertainment

7.9

Overall

8.0

Comfort

7.9

Food

7.3

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
8.0
Very good
7,917 reviews
Delta
8.0
Very good
7,917 reviews

Crew

8.5

Entertainment

7.9

Overall

8.0

Comfort

7.9

Food

7.3

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
United Airlines
7.4
Good
8,667 reviews
Delta
8.0
Very good
7,917 reviews

Crew

8.5

Entertainment

7.9

Overall

8.0

Comfort

7.9

Food

7.3

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Turkish Airlines
7.3
Good
3,769 reviews
Delta
8.0
Very good
7,917 reviews

Crew

8.5

Entertainment

7.9

Overall

8.0

Comfort

7.9

Food

7.3

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Aer Lingus
7.0
Good
1,063 reviews
Delta
8.0
Very good
7,917 reviews

Crew

8.5

Entertainment

7.9

Overall

8.0

Comfort

7.9

Food

7.3

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

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, Delta ($762), United Airlines ($853), and Turkish Airlines ($1,066) offers the cheapest pricing from Bilbao to Seattle. Delta is 22% cheaper than the average price of flights available within the next 90 days to this destination.

  • 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 July is currently the most expensive (average of $411). 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 Bilbao?

Book flights to Bilbao if you plan to visit one of these locations
SeaTac
Tukwila
Tacoma
Renton
Lakewood
Ocean Shores
Lacey
Leavenworth
Federal Way
Olympia
Shoreline
Cle Elum
Centralia
Aberdeen
Kent
Lynnwood
Shelton
Silverdale
Redmond
Issaquah

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