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Bilbao

$250+ 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 9/23. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BIO
jul. 8 — jul. 151
mar. 7/8
mar. 7/15
1 adult, Economy
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Cheap 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 julio 3, 2025.

Round-trip from

$605
(Air France)

One-way from

$250
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$1,346
From Seattle/Tacoma Intl to Bilbao
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One-way flight from Seattle/Tacoma Intl to Bilbao
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Highest demand for flights based on searches. 18% potential increase in price ($251 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($40 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 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 julio 3, 2025.

This Air France deal was found by Cheapflights users on 7/1. 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.
mié. 10/156:35 pmSEA - BIO
1 stop18h 25mAir France
jue. 10/237:10 amBIO - SEA
1 stop19h 30mAir France
Deal found 7/1$605
This Delta deal was found by Cheapflights users on 7/1. 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.
mié. 10/156:05 amSEA - BIO
2 stops20h 10mDelta
jue. 10/2311:05 amBIO - SEA
1 stop15h 35mDelta
Deal found 7/1$636
This United Airlines deal was found by Cheapflights users on 7/3. 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.
vie. 9/511:54 pmSEA - BIO
2 stops25h 51mUnited Airlines
lun. 9/292:10 pmBIO - SEA
2 stops37h 26mUnited Airlines
Deal found 7/3$743
This FlightHub deal was found by Cheapflights users on 7/3. 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.
vie. 9/126:50 pmSEA - BIO
1 stop19h 35mLufthansa
lun. 9/227:10 pmBIO - SEA
2 stops28h 06mLufthansa
Deal found 7/3$750
This Iberia deal was found by Cheapflights users on 7/3. 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.
vie. 9/125:26 amSEA - BIO
2 stops22h 19mIberia
lun. 9/229:35 pmBIO - SEA
2 stops32h 48mIberia
Deal found 7/3$755
This Booking.com deal was found by Cheapflights users on 7/2. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 11/203:40 pmSEA - BIO
2 stops46h 25mMultiple Airlines
vie. 11/286:40 amBIO - SEA
2 stops24h 26mMultiple Airlines
Deal found 7/2$811
This American Airlines deal was found by Cheapflights users on 7/3. 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.
vie. 8/156:34 amSEA - BIO
2 stops16h 56mAmerican Airlines
vie. 8/221:30 pmBIO - SEA
2 stops19h 11mAmerican Airlines
Deal found 7/3$834
This KLM deal was found by Cheapflights users on 7/3. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 8/156:40 pmSEA - BIO
1 stop18h 20mKLM
vie. 8/227:10 amBIO - SEA
1 stop13h 05mKLM
Deal found 7/3$836
This Gotogate deal was found by Cheapflights users on 7/3. 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.
vie. 8/154:00 pmSEA - BIO
2 stops58h 15mScandinavian Airlines
vie. 8/228:45 pmBIO - SEA
1 stop26h 05mScandinavian Airlines
Deal found 7/3$855
This TAP AIR PORTUGAL deal was found by Cheapflights users on 7/1. 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.
vie. 9/511:30 amSEA - BIO
2 stops21h 05mTAP AIR PORTUGAL
lun. 9/2912:25 pmBIO - SEA
3 stops30h 54mTAP AIR PORTUGAL
Deal found 7/1$1,240
This Air Canada deal was found by Cheapflights users on 7/1. 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.
mar. 10/77:15 pmSEA - BIO
2 stops33h 10mAir Canada
mar. 10/147:15 amBIO - SEA
2 stops23h 30mAir Canada
Deal found 7/1$1,515

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 julio 3, 2025.
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

vie. 9/5

11:54 pm-10:45 am

2 stops25h 51m

Bilbao

lun. 9/29

2:10 pm-6:36 pm

2 stops37h 26m

$743

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

vie. 9/12

6:50 pm-11:25 pm

1 stop19h 35m

Bilbao

lun. 9/22

7:10 pm-2:16 pm

2 stops28h 06m

$750

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

vie. 9/12

5:26 am-12:45 pm

2 stops22h 19m

Bilbao

lun. 9/22

9:35 pm-9:23 pm

2 stops32h 48m

$755

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

vie. 8/15

6:34 am-8:30 am

2 stops16h 56m

Bilbao

vie. 8/22

1:30 pm-11:41 pm

2 stops19h 11m

$834

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

vie. 8/15

6:40 pm-10:00 pm

1 stop18h 20m

Bilbao

vie. 8/22

7:10 am-11:15 am

1 stop13h 05m

$836

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

sáb. 8/16

7:15 pm-6:25 pm

2 stops38h 10m

Bilbao

sáb. 8/23

7:15 pm-11:55 am

1 stop25h 40m

$840

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

vie. 8/15

4:00 pm-11:15 am

2 stops58h 15m

Bilbao

vie. 8/22

8:45 pm-1:50 pm

1 stop26h 05m

$855

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

vie. 9/5

11:30 am-5:35 pm

2 stops21h 05m

Bilbao

lun. 9/29

12:25 pm-10:19 am

3 stops30h 54m

$1,240

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

mar. 9/23

7:00 pm-10:40 pm

2 stops18h 40m

$250

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

mar. 9/23

7:35 pm-5:30 pm

1 stop12h 55m

$437

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/1

Showing 1-10 of 11 results
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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 $541). Flying from Seattle to Bilbao in June is currently the most expensive (average of $1,142). 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.

What is the cheapest time of day to fly from SEA to BIO?

Find hourly flight availability from Seattle to Bilbao. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated julio 3, 2025.

It’s optimal to fly from Seattle to Bilbao in the morning. By choosing this option you can save up to 43% on the cost of your flight, compared to a flight at noon.

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 julio 3, 2025.
Peruse reviews from past customers who have flown with Delta, KLM, and Air France 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
8.0
Very good
7,982 reviews

Boarding

8.2

Crew

8.5

Overall

8.0

Entertainment

7.9

Comfort

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,982 reviews
Delta
8.0
Very good
7,982 reviews

Boarding

8.2

Crew

8.5

Overall

8.0

Entertainment

7.9

Comfort

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
KLM
7.8
Good
1,367 reviews
Delta
8.0
Very good
7,982 reviews

Boarding

8.2

Crew

8.5

Overall

8.0

Entertainment

7.9

Comfort

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Air France
7.5
Good
1,465 reviews
Delta
8.0
Very good
7,982 reviews

Boarding

8.2

Crew

8.5

Overall

8.0

Entertainment

7.9

Comfort

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,861 reviews
Delta
8.0
Very good
7,982 reviews

Boarding

8.2

Crew

8.5

Overall

8.0

Entertainment

7.9

Comfort

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Scandinavian Airlines
7.3
Good
1,416 reviews
Delta
8.0
Very good
7,982 reviews

Boarding

8.2

Crew

8.5

Overall

8.0

Entertainment

7.9

Comfort

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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.

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

    Cheapflights users have booked flights from Seattle to Bilbao round-trip from $605. Other airlines that can offer you cheap pricing are Delta, from $636, and United Airlines, from $743. Air France is 44% 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 $541). Flying from Seattle to Bilbao in June is currently the most expensive (average of $1,142). 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

Browse thousands of different options on Cheapflights for your next trip

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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.
Portland to Bilbao flights
Seattle to San Sebastian flights
Pasco to Bilbao flights

Top 5 airlines flying from Seattle to Bilbao

Discover the top 5 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 julio 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$596Average$1,147FlexibilityNo cancel feeOn-time69%
Air FranceCheapest$675Average$968FlexibilityNo cancel feeOn-time77%
LufthansaCheapest$686Average$1,232FlexibilityNo cancel feeOn-time76%
KLMCheapest$702Average$984FlexibilityNo cancel feeOn-time75%
DeltaCheapest$730Average$1,239FlexibilityNo cancel feeOn-timeN/A

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