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$733+ Cheap flights from Bilbao (BIO) to Seattle (SEA)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/16. Fares are subject to change and may not be available on all flights or dates of travel.
BIO — SEA
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
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 September 11, 2025.

Round-trip from

$745
(Iberia)

Popular in

August

Cheapest in

February

Average price

$836
From Bilbao to Seattle/Tacoma Intl
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Highest demand for flights based on searches. 15% potential increase in price ($190 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($55 potential savings vs. average RT price).
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Average for round-trip flights in September 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 September 11, 2025.

This American Airlines deal was found by Cheapflights users on 9/9. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/169:15 amBIO - SEA
2 stops20h 31mAmerican Airlines
Wed 10/297:10 amSEA - BIO
2 stops17h 20mAmerican Airlines
Deal found 9/9$733
This Iberia deal was found by Cheapflights users on 9/10. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/136:45 amBIO - SEA
2 stops25h 33mIberia
Mon 11/176:50 pmSEA - BIO
2 stops28h 40mIberia
Deal found 9/10$745
This Gotogate deal was found by Cheapflights users on 9/10. 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.
Fri 10/176:45 amBIO - SEA
1 stop14h 10mLufthansa
Fri 10/314:10 pmSEA - BIO
1 stop23h 10mLufthansa
Deal found 9/10$776
This United Airlines deal was found by Cheapflights users on 9/11. 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 9/296:45 amBIO - SEA
1 stop14h 10mUnited Airlines
Sun 10/56:50 pmSEA - BIO
1 stop19h 35mUnited Airlines
Deal found 9/11$781
This United Airlines deal was found by Cheapflights users on 9/10. 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 10/176:45 amBIO - SEA
1 stop14h 10mUnited Airlines
Fri 10/316:20 amSEA - BIO
3 stops33h 00mUnited Airlines
Deal found 9/10$784
This Air Canada deal was found by Cheapflights users on 9/9. 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 Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/136:45 amBIO - SEA
2 stops24h 21mAir Canada
Mon 11/1710:05 amSEA - BIO
2 stops21h 35mAir Canada
Deal found 9/9$786
This United Airlines deal was found by Cheapflights users on 9/9. 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.
Thu 10/166:45 amBIO - SEA
1 stop14h 10mUnited Airlines
Wed 10/298:00 amSEA - BIO
2 stops18h 50mUnited Airlines
Deal found 9/9$787
This United Airlines deal was found by Cheapflights users on 9/9. 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.
Thu 11/136:45 amBIO - SEA
2 stops23h 09mUnited Airlines
Mon 11/178:36 amSEA - BIO
3 stops23h 04mUnited Airlines
Deal found 9/9$792
This Air Canada deal was found by Cheapflights users on 9/9. 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 Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/27:25 amBIO - SEA
2 stops23h 41mAir Canada
Sat 11/88:00 pmSEA - BIO
2 stops37h 05mAir Canada
Deal found 9/9$796
This Lufthansa deal was found by Cheapflights users on 9/9. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/27:25 amBIO - SEA
1 stop14h 55mLufthansa
Sat 11/87:00 amSEA - BIO
2 stops20h 00mLufthansa
Deal found 9/9$799
This United Airlines deal was found by Cheapflights users on 9/9. 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.
Sat 11/17:25 amBIO - SEA
2 stops21h 29mUnited Airlines
Fri 11/78:00 amSEA - BIO
2 stops17h 50mUnited Airlines
Deal found 9/9$802

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 September 11, 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 10/16

9:15 am-8:46 pm

2 stops20h 31m

Seattle/Tacoma Intl

Wed 10/29

7:10 am-8:30 am

2 stops17h 20m

$733

BilbaoSeattle

BIO - SEA

BIOSEA

Bilbao

Thu 11/13

6:45 am-11:18 pm

2 stops25h 33m

Seattle/Tacoma Intl

Mon 11/17

6:50 pm-8:30 am

2 stops28h 40m

$745

BilbaoSeattle

BIO - SEA

BIOSEA

Bilbao

Fri 10/17

6:45 am-11:55 am

1 stop14h 10m

Seattle/Tacoma Intl

Fri 10/31

4:10 pm-11:20 pm

1 stop23h 10m

$776

BilbaoSeattle

BIO - SEA

BIOSEA

Bilbao

Thu 11/13

6:45 am-12:10 pm

1 stop14h 25m

Seattle/Tacoma Intl

Mon 11/17

8:00 am-10:50 am

2 stops17h 50m

$781

BilbaoSeattle

BIO - SEA

BIOSEA

Bilbao

Mon 9/29

6:45 am-11:55 am

1 stop14h 10m

Seattle/Tacoma Intl

Sun 10/5

6:50 pm-11:25 pm

1 stop19h 35m

$781

BilbaoSeattle

BIO - SEA

BIOSEA

Bilbao

Mon 9/29

6:45 am-11:55 am

1 stop14h 10m

Seattle/Tacoma Intl

Sun 10/5

6:50 pm-11:25 pm

1 stop19h 35m

$781

BilbaoSeattle

BIO - SEA

BIOSEA

Bilbao

Fri 10/17

6:45 am-11:55 am

1 stop14h 10m

Seattle/Tacoma Intl

Fri 10/31

6:20 am-11:20 pm

3 stops33h 00m

$784

BilbaoSeattle

BIO - SEA

BIOSEA

Bilbao

Thu 11/13

6:45 am-10:06 pm

2 stops24h 21m

Seattle/Tacoma Intl

Mon 11/17

10:05 am-4:40 pm

2 stops21h 35m

$786

BilbaoSeattle

BIO - SEA

BIOSEA

Bilbao

Thu 10/16

6:45 am-11:55 am

1 stop14h 10m

Seattle/Tacoma Intl

Wed 10/29

8:00 am-10:50 am

2 stops18h 50m

$787

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/9

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

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

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.

  • How long is the flight from Bilbao to Seattle?

    American Airlines, Iberia, and Lufthansa can get you from Bilbao to Seattle in just under 14h 10m. Your travel time can differ by up to 11h 23m. Bilbao and Seattle are separated by a distance of 5159 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • 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 $388). 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?

Book flights to Seattle if you plan to visit one of these locations
SeaTac
Tukwila
Tacoma
Lakewood
Ocean Shores
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Edmonds
Leavenworth
Lacey
Renton
Olympia
Kent
Federal Way
Cle Elum
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Shoreline

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