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$300+ Cheap flights from Washington 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 11/17. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BIO
Oct 16 — Oct 231
Thu 10/16
Thu 10/23
1 adult, Economy
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Cheap flight deals from Washington to Bilbao

Keep the following information in mind while searching for Washington to Bilbao flight deals. Data was last updated September 16, 2025.

Round-trip from

$545
(Mytrip)

One-way from

$300
(Kiwi.com)

Popular in

June

Cheapest in

October

Average price

$1,114
From Washington to Bilbao
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One-way flight from Washington to Bilbao
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Highest demand for flights based on searches. 15% potential increase in price ($192 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 September 2025
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Find flight deals from Washington to Bilbao

Cheapest flights from Washington to Bilbao
Explore the most affordable flight options available from Washington to Bilbao. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 16, 2025.

This Mytrip deal was found by Cheapflights users on 9/16. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/73:25 pmPDX - BIO
2 stops23h 00mMultiple Airlines
Thu 10/166:45 amBIO - PDX
2 stops25h 16mMultiple Airlines
Deal found 9/16$545
This Gotogate deal was found by Cheapflights users on 9/14. 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.
Sat 11/228:00 pmSEA - BIO
2 stops42h 05mMultiple Airlines
Tue 12/27:25 amBIO - SEA
2 stops40h 06mMultiple Airlines
Deal found 9/14$553
This Mytrip deal was found by Cheapflights users on 9/14. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/235:50 amSEA - BIO
2 stops27h 15mMultiple Airlines
Tue 12/27:25 amBIO - SEA
2 stops20h 51mMultiple Airlines
Deal found 9/14$555
This Air Canada deal was found by Cheapflights users on 9/14. 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.
Sat 11/228:00 pmSEA - BIO
2 stops37h 05mAir Canada
Tue 12/26:45 amBIO - SEA
3 stops24h 21mAir Canada
Deal found 9/14$561
This United Airlines deal was found by Cheapflights users on 9/14. 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.
Sun 11/233:10 pmSEA - BIO
1 stop22h 55mUnited Airlines
Tue 12/26:45 amBIO - SEA
2 stops24h 31mUnited Airlines
Deal found 9/14$568
This United Airlines deal was found by Cheapflights users on 9/15. 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 11/2211:59 pmSEA - BIO
2 stops38h 06mUnited Airlines
Tue 12/26:45 amBIO - SEA
2 stops24h 31mUnited Airlines
Deal found 9/15$572
This United Airlines deal was found by Cheapflights users on 9/16. 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 11/108:20 amPDX - BIO
2 stops17h 30mUnited Airlines
Wed 11/1912:50 pmBIO - PDX
2 stops20h 36mUnited Airlines
Deal found 9/16$576
This FlightHub deal was found by Cheapflights users on 9/14. 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.
Sat 11/228:00 pmSEA - BIO
2 stops37h 05mMultiple Airlines
Mon 12/112:50 pmBIO - SEA
1 stop32h 20mMultiple Airlines
Deal found 9/14$581
This Trip.com deal was found by Cheapflights users on 9/14. 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.
Wed 10/292:50 pmPSC - BIO
2 stops24h 15mUnited Airlines
Wed 11/512:50 pmBIO - PSC
2 stops41h 12mUnited Airlines
Deal found 9/14$581
This Air Canada deal was found by Cheapflights users on 9/14. 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.
Sat 11/228:00 pmSEA - BIO
2 stops37h 05mAir Canada
Mon 12/111:35 amBIO - SEA
2 stops43h 31mAir Canada
Deal found 9/14$582
This United deal was found by Cheapflights users on 9/14. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2811:35 pmSEA - BIO
2 stops27h 15mMultiple Airlines
Mon 11/1012:50 pmBIO - SEA
1 stop32h 20mMultiple Airlines
Deal found 9/14$585
This KLM deal was found by Cheapflights users on 9/15. 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.
Wed 10/16:35 pmSEA - BIO
1 stop30h 50mKLM
Fri 10/106:50 amBIO - SEA
1 stop18h 15mKLM
Deal found 9/15$591

Cheapflights Fare Finder

 
Customize your flight search to find flights from Washington 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 September 16, 2025.
Use the filters below to find and compare flights from Washington to Bilbao that are best for you.

Fly from

Washington

Fly to

Bilbao

Route

Depart

Return

Price

PortlandBilbao

PDX - BIO

PDXBIO

Portland

Tue 10/7

3:25 pm-11:25 pm

2 stops23h 00m

Bilbao

Thu 10/16

6:45 am-11:01 pm

2 stops25h 16m

$545

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Sat 11/22

8:00 pm-11:05 pm

2 stops42h 05m

Bilbao

Tue 12/2

7:25 am-2:31 pm

2 stops40h 06m

$553

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Sun 11/23

5:50 am-6:05 pm

2 stops27h 15m

Bilbao

Tue 12/2

6:45 am-10:06 pm

3 stops24h 21m

$561

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Sun 11/23

5:50 am-6:05 pm

2 stops27h 15m

Bilbao

Tue 12/2

6:45 am-10:06 pm

3 stops24h 21m

$561

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Sun 11/23

3:10 pm-11:05 pm

1 stop22h 55m

Bilbao

Tue 12/2

6:45 am-10:16 pm

2 stops24h 31m

$568

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Sat 11/22

11:59 pm-11:05 pm

2 stops38h 06m

Bilbao

Tue 12/2

6:45 am-10:16 pm

2 stops24h 31m

$572

PortlandBilbao

PDX - BIO

PDXBIO

Portland

Mon 11/10

8:20 am-10:50 am

2 stops17h 30m

Bilbao

Wed 11/19

12:50 pm-12:26 am

2 stops20h 36m

$576

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Wed 2/4

7:00 am-10:50 am

2 stops18h 50m

Bilbao

Wed 2/25

12:50 pm-12:59 am

2 stops21h 09m

$577

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Sat 11/22

8:00 pm-6:05 pm

2 stops37h 05m

Bilbao

Mon 12/1

12:50 pm-12:10 pm

1 stop32h 20m

$581

PascoBilbao

PSC - BIO

PSCBIO

Pasco Tri Cities

Wed 10/29

2:50 pm-11:05 pm

2 stops24h 15m

Bilbao

Wed 11/5

12:50 pm-9:02 pm

2 stops41h 12m

$581

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

Showing 1-10 of 29 results
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Best time to book a flight from Washington to Bilbao

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

What is the cheapest month to book a flight from State of Washington to Bilbao?

Currently, January is the cheapest month in which you can book a flight from State of Washington to Bilbao (average of $541). Flying from State of Washington to Bilbao in June is currently the most expensive (average of $1,136). 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 WA to BIO?

Find hourly flight availability from Washington 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 September 16, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from State of Washington to Bilbao as you normally would.

Related info for your journey

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

  • What airport do you fly into for flights to Bilbao from Washington?

    Bilbao (BIO), located 3.0 mi from the city center, is the airport you fly into when you book flights from Washington to Bilbao.

  • How long is the flight from State of Washington to Bilbao?

    There are many flights that can get you from State of Washington to Bilbao in 12h 55m. Fly via Air Canada, United Airlines, or KLM to get the fastest option. There are 5265 mi between State of Washington and Bilbao. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the most popular routes from State of Washington to Bilbao?

    The most popular flight routes from State of Washington to Bilbao are Seattle/Tacoma Intl - Bilbao, Pasco Tri Cities - Bilbao and Portland - Bilbao.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Washington 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 State of Washington to Bilbao?

    Currently, January is the cheapest month in which you can book a flight from State of Washington to Bilbao (average of $541). Flying from State of Washington to Bilbao in June is currently the most expensive (average of $1,136). 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.

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Alternative routes for Washington to Bilbao

See prices for flight routes from nearby airports that may be better suited for you.
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Top 5 airlines flying from Washington to Bilbao

Discover the top 5 airlines that operate flights from Washington 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 September 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$596Average$1,147FlexibilityNo cancel feeOn-time69%
Air FranceCheapest$675Average$968FlexibilityNo cancel feeOn-time77%
KLMCheapest$702Average$1,064FlexibilityNo cancel feeOn-time75%
DeltaCheapest$730Average$1,110FlexibilityNo cancel feeOn-timeN/A
LufthansaCheapest$749Average$1,076FlexibilityNo cancel feeOn-time76%

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