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$426+ 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 2/13. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BIO
Dec 3 — Dec 101
Wed 12/3
Wed 12/10
1 adult, Economy
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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 November 3, 2025.

This Air France deal was found by Cheapflights users on 11/2. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/301:25 pmPDX - BIO
1 stop12h 55mKLM
Sun 12/75:20 pmBIO - PDX
1 stop27h 05mKLM
Deal found 11/2$476
This FlightHub deal was found by Cheapflights users on 11/2. 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 FlightHub 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
Wed 12/37:25 amBIO - SEA
1 stop14h 55mMultiple Airlines
Deal found 11/2$570
This Air Canada deal was found by Cheapflights users on 11/2. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/235:50 amSEA - BIO
2 stops27h 15mAir Canada
Wed 12/37:25 amBIO - SEA
2 stops23h 51mAir Canada
Deal found 11/2$576
This Priceline deal was found by Cheapflights users on 11/2. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/235:50 amSEA - BIO
2 stops27h 15mAir Canada
Mon 12/111:35 amBIO - SEA
2 stops43h 31mAir Canada
Deal found 11/2$579
This Expedia deal was found by Cheapflights users on 11/2. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/305:45 pmPDX - BIO
2 stops20h 30mIberia
Sun 12/79:15 amBIO - PDX
2 stops21h 06mIberia
Deal found 11/2$584
This Delta deal was found by Cheapflights users on 11/1. 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.
Tue 12/237:10 pmPDX - BIO
2 stops36h 20mDelta
Wed 1/146:50 amBIO - PDX
1 stop13h 35mDelta
Deal found 11/1$629
This Delta deal was found by Cheapflights users on 11/1. 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.
Tue 12/237:10 pmPDX - BIO
2 stops36h 20mDelta
Fri 1/166:50 amBIO - PDX
2 stops38h 54mDelta
Deal found 11/1$634
This Cheapflightsfares deal was found by Cheapflights users on 11/3. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1810:05 amSEA - BIO
2 stops26h 50mLufthansa
Tue 11/256:45 amBIO - SEA
1 stop14h 25mLufthansa
Deal found 11/3$652
This Air Canada deal was found by Cheapflights users on 11/3. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/185:50 amSEA - BIO
2 stops31h 05mMultiple Airlines
Tue 11/256:45 amBIO - SEA
3 stops24h 21mMultiple Airlines
Deal found 11/3$669
This FlightHub deal was found by Cheapflights users on 11/2. 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 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 05mAir Canada
Mon 12/111:35 amBIO - SEA
2 stops40h 41mAir Canada
Deal found 11/2$680
This United Airlines deal was found by Cheapflights users on 11/1. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/243:52 pmPDX - BIO
2 stops22h 28mUnited Airlines
Sun 1/116:45 amBIO - PDX
2 stops24h 47mUnited Airlines
Deal found 11/1$681
This United Airlines deal was found by Cheapflights users on 11/1. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/243:52 pmPDX - BIO
2 stops22h 28mUnited Airlines
Thu 1/157:40 amBIO - PDX
2 stops24h 26mUnited Airlines
Deal found 11/1$683

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 November 3, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$466
(Cheapflightsfares)

One-way from

$426
(United Airlines)

Popular in

June

Cheapest in

October

Average price

$870
Provider with most accurate pricing for Seattle/Tacoma Intl-Bilbao flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Bilbao flights.
Search Deals
From Washington to Bilbao
Search Deals
One-way flight from Washington to Bilbao
Search Deals
Highest demand for flights based on searches. 15% potential increase in price ($195 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($41 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
Search Deals

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 November 3, 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

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Wed 2/18

3:10 pm-6:05 pm

1 stop17h 55m

Bilbao

Sat 2/28

6:45 am-12:10 pm

1 stop14h 25m

$466

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Wed 2/18

12:43 pm-9:55 pm

3 stops48h 12m

Bilbao

Sat 2/28

6:45 am-10:43 pm

2 stops24h 58m

$495

PortlandBilbao

PDX - BIO

PDXBIO

Portland

Sun 11/30

5:45 pm-11:15 pm

2 stops20h 30m

Bilbao

Sun 12/7

9:15 am-9:21 pm

2 stops21h 06m

$584

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Wed 2/18

5:50 am-12:05 pm

3 stops21h 15m

Bilbao

Sat 2/28

6:45 am-10:06 pm

3 stops24h 21m

$590

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Thu 3/5

11:00 am-12:50 pm

2 stops16h 50m

Bilbao

Thu 3/12

6:45 am-1:10 pm

1 stop14h 25m

$625

PascoBilbao

PSC - BIO

PSCBIO

Pasco Tri Cities

Fri 3/13

3:11 pm-11:20 pm

2 stops24h 09m

Bilbao

Tue 3/17

11:35 am-8:49 pm

2 stops41h 14m

$637

PortlandBilbao

PDX - BIO

PDXBIO

Portland

Tue 12/23

7:10 pm-4:30 pm

2 stops36h 20m

Bilbao

Tue 1/13

7:25 am-8:27 pm

2 stops22h 02m

$640

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Sun 11/23

3:00 pm-10:45 pm

1 stop22h 45m

Bilbao

Wed 12/3

6:05 pm-11:25 am

1 stop26h 20m

$644

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Tue 11/18

10:05 am-9:55 pm

2 stops26h 50m

Bilbao

Tue 11/25

6:45 am-12:10 pm

1 stop14h 25m

$652

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Tue 11/18

10:05 am-9:55 pm

2 stops26h 50m

Bilbao

Tue 11/25

6:45 am-10:06 pm

3 stops24h 21m

$669

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/1

Showing 1-10 of 30 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, October is the cheapest month in which you can book a flight from State of Washington to Bilbao (average of $505). Flying from State of Washington to Bilbao in June is currently the most expensive (average of $1,288). 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 November 3, 2025.

It’s optimal to fly from State of Washington to Bilbao in the evening. By choosing this option you can save up to 49% on the cost of your flight, compared to a flight at noon.

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 17h 55m. Fly via Lufthansa, United Airlines, or Iberia to get the fastest option. There are 5159 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 cheapest airlines to fly from State of Washington to Bilbao one-way?

    The cheapest airline one-way is United Airlines, with whom users have recently found tickets for as low as $426. However, be on the lookout for offers from Air Canada and Iberia, as they are both options that can get you from State of Washington to Bilbao for a low price.

  • 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, Portland - Bilbao and Pasco Tri Cities - 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, October is the cheapest month in which you can book a flight from State of Washington to Bilbao (average of $505). Flying from State of Washington to Bilbao in June is currently the most expensive (average of $1,288). 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 Washington to Bilbao

See prices for flight routes from nearby airports that may be better suited for you.
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Top 4 airlines flying from Washington to Bilbao

Discover the top 4 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 November 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest$514Average$1,033FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$596Average$1,068FlexibilityNo cancel feeOn-time69%
KLMCheapest$701Average$1,075FlexibilityNo cancel feeOn-time75%
DeltaCheapest$730Average$1,080FlexibilityNo cancel feeOn-timeN/A

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