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Bilbao

$469+ 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 5/20. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BIO
May 4 — May 111
Sun 5/4
Sun 5/11
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 April 29, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$629
(Lufthansa)

One-way from

$469
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$1,068
Provider with most accurate pricing for Seattle/Tacoma Intl-Bilbao flight deals.
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Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Bilbao flights.
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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. 16% potential increase in price ($223 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($35 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 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 April 29, 2025.

This Lufthansa deal was found by Cheapflights users on 4/28. 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.
Wed 9/176:50 pmSEA - BIO
1 stop19h 35mLufthansa
Thu 10/26:45 amBIO - SEA
2 stops16h 31mLufthansa
Deal found 4/28$629
This Air Canada deal was found by Cheapflights users on 4/28. 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.
Mon 9/295:30 amSEA - BIO
2 stops28h 15mAir Canada
Thu 10/166:45 amBIO - SEA
2 stops20h 51mAir Canada
Deal found 4/28$633
This SWISS deal was found by Cheapflights users on 4/28. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/301:45 pmSEA - BIO
2 stops32h 55mSWISS
Thu 10/168:25 amBIO - SEA
2 stops19h 11mSWISS
Deal found 4/28$634
This Delta deal was found by Cheapflights users on 4/28. 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.
Tue 10/146:35 pmSEA - BIO
1 stop13h 05mDelta
Tue 10/2811:55 amBIO - SEA
1 stop32h 55mDelta
Deal found 4/28$638
This United Airlines deal was found by Cheapflights users on 4/28. 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 10/11:09 pmSEA - BIO
2 stops25h 16mUnited Airlines
Wed 10/157:15 amBIO - SEA
1 stop18h 44mUnited Airlines
Deal found 4/28$645
This Travelocity deal was found by Cheapflights users on 4/28. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/176:50 pmSEA - BIO
1 stop19h 35mMultiple Airlines
Mon 9/297:10 pmBIO - SEA
2 stops28h 06mMultiple Airlines
Deal found 4/28$648
This Air France deal was found by Cheapflights users on 4/28. 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 9/146:45 pmSEA - BIO
1 stop18h 15mAir France
Fri 9/267:10 amBIO - SEA
1 stop19h 30mAir France
Deal found 4/28$728
This KLM deal was found by Cheapflights users on 4/28. 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.
Tue 9/161:55 pmSEA - BIO
1 stop17h 35mKLM
Wed 10/16:50 amBIO - SEA
1 stop14h 00mKLM
Deal found 4/28$829
This lol.travel deal was found by Cheapflights users on 4/28. 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 5/87:10 pmSEA - BIO
1 stop30h 55mTurkish Airlines
Wed 5/216:25 pmBIO - SEA
1 stop31h 50mTurkish Airlines
Deal found 4/28$985
This FlightHub deal was found by Cheapflights users on 4/28. 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.
Thu 10/22:00 pmSEA - BIO
2 stops20h 50mScandinavian Airlines
Thu 10/1611:05 amBIO - SEA
2 stops35h 55mScandinavian Airlines
Deal found 4/28$1,240
This Ovago deal was found by Cheapflights users on 4/28. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/1311:30 amSEA - BIO
2 stops21h 30mTAP AIR PORTUGAL
Sun 10/266:40 pmBIO - SEA
2 stops34h 39mTAP AIR PORTUGAL
Deal found 4/28$1,498
This Gurufare deal was found by Cheapflights users on 4/28. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/2212:05 amSEA - BIO
2 stops32h 25mAer Lingus
Sat 8/166:10 pmBIO - SEA
1 stop32h 40mAer Lingus
Deal found 4/28$1,589

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 April 29, 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

Thu 5/8

5:05 pm-7:35 am

2 stops29h 30m

Bilbao

Wed 5/21

9:05 pm-3:05 pm

2 stops27h 00m

$920

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Thu 5/8

7:10 pm-11:05 am

1 stop30h 55m

Bilbao

Wed 5/21

6:25 pm-5:15 pm

1 stop31h 50m

$985

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Wed 6/11

1:45 pm-6:20 pm

2 stops19h 35m

Bilbao

Wed 6/18

6:45 am-2:16 pm

2 stops16h 31m

$1,099

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Wed 6/11

6:50 pm-5:50 pm

1 stop14h 00m

Bilbao

Wed 6/18

6:45 am-6:36 pm

2 stops20h 51m

$1,114

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Wed 6/11

6:45 pm-10:00 pm

1 stop18h 15m

Bilbao

Wed 6/18

5:15 pm-3:55 pm

1 stop31h 40m

$1,128

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Thu 6/12

5:00 am-10:45 am

2 stops20h 45m

Bilbao

Thu 6/19

6:45 am-9:21 am

2 stops35h 36m

$1,176

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Thu 6/12

1:30 pm-4:40 pm

1 stop18h 10m

Bilbao

Thu 6/19

6:50 am-11:40 am

1 stop13h 50m

$1,198

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Sun 6/22

12:05 am-5:30 pm

2 stops32h 25m

Bilbao

Sat 8/16

6:10 pm-5:50 pm

1 stop32h 40m

$1,589

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Tue 5/20

1:54 pm-4:55 pm

2 stops18h 01m

Bilbao

Wed 5/21

9:35 pm-11:35 am

2 stops23h 00m

$1,599

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Thu 6/12

11:37 pm-5:35 pm

3 stops32h 58m

Bilbao

Thu 6/19

12:15 pm-10:20 am

2 stops31h 05m

$3,074

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/28

Showing 1-10 of 12 results
1
2

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 April.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*2 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice 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 AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on Seattle-Bilbao flight deals on Cheapflights vs. AranGrant >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 AranGrant the most. AranGrant 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

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 $1,178). 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 April 29, 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.

Rainfall in Bilbao by month

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

In terms of precipitation, rainfall in Bilbao ranges from 2.4 - 5.6 inches per month. November is typically the wettest month, when rainfall can reach 5.6 in. July is typically the driest time to visit Bilbao when rainfall is around 2.4 in.

Temperature in Bilbao by month

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

If weather is an important factor for your trip to Bilbao, 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 68.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 48.2 F).

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 April 29, 2025.
Delta
8.0
Very good
7,929 reviews

Boarding

8.2

Entertainment

7.9

Crew

8.5

Food

7.3

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,929 reviews
Delta
8.0
Very good
7,929 reviews

Boarding

8.2

Entertainment

7.9

Crew

8.5

Food

7.3

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
KLM
7.8
Good
1,333 reviews
Delta
8.0
Very good
7,929 reviews

Boarding

8.2

Entertainment

7.9

Crew

8.5

Food

7.3

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
SWISS
7.5
Good
1,587 reviews
Delta
8.0
Very good
7,929 reviews

Boarding

8.2

Entertainment

7.9

Crew

8.5

Food

7.3

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Air France
7.4
Good
1,444 reviews
Delta
8.0
Very good
7,929 reviews

Boarding

8.2

Entertainment

7.9

Crew

8.5

Food

7.3

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
United Airlines
7.4
Good
8,696 reviews
Delta
8.0
Very good
7,929 reviews

Boarding

8.2

Entertainment

7.9

Crew

8.5

Food

7.3

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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 $629. Other airlines that can offer you cheap pricing are Air Canada, from $633, and SWISS, from $634. Lufthansa is 43% 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 $1,178). 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

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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.
Seattle to San Sebastian flights
Portland to Bilbao 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 April 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$596Average$1,425FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$672Average$1,233FlexibilityNo cancel feeOn-time76%
Air FranceCheapest$675Average$1,181FlexibilityNo cancel feeOn-time77%
DeltaCheapest$730Average$1,194FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$765Average$1,011FlexibilityNo cancel feeOn-time75%

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