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$303+ 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 4/24. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BIO
Mar 6 — Mar 131
Fri 3/6
Fri 3/13
1 adult, Economy
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Cheap 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 February 4, 2026.

This Cheapflightsfares deal was found by Cheapflights users on 2/3. 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.
Wed 4/156:50 pm
SEA
-
BIO
1 stop19h 35m
Lufthansa
Wed 4/296:50 am
BIO
-
SEA
1 stop14h 30m
Lufthansa
Deal found 2/3$458
This Mytrip deal was found by Cheapflights users on 2/3. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/156:50 pm
SEA
-
BIO
1 stop19h 35m
Multiple Airlines
Wed 4/296:50 am
BIO
-
SEA
2 stops24h 03m
Multiple Airlines
Deal found 2/3$460
This United Airlines deal was found by Cheapflights users on 2/3. 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.
Wed 4/158:00 am
SEA
-
BIO
2 stops30h 25m
United Airlines
Wed 4/296:50 am
BIO
-
SEA
2 stops48h 03m
United Airlines
Deal found 2/3$487
This United Airlines deal was found by Cheapflights users on 2/3. 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.
Wed 3/181:39 pm
PDX
-
BIO
2 stops24h 16m
United Airlines
Wed 3/257:25 am
BIO
-
PDX
2 stops23h 39m
United Airlines
Deal found 2/3$491
This United Airlines deal was found by Cheapflights users on 2/3. 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.
Wed 4/87:15 am
PDX
-
BIO
2 stops25h 00m
United Airlines
Tue 4/216:50 am
BIO
-
PDX
2 stops24h 39m
United Airlines
Deal found 2/3$502
This United Airlines deal was found by Cheapflights users on 2/3. 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.
Tue 9/2210:00 am
PDX
-
BIO
1 stop15h 45m
United Airlines
Wed 9/306:50 am
BIO
-
PDX
2 stops17h 01m
United Airlines
Deal found 2/3$506
This Air Canada deal was found by Cheapflights users on 2/3. 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.
Mon 10/123:30 pm
PDX
-
BIO
2 stops17h 25m
Air Canada
Tue 10/206:50 am
BIO
-
PDX
2 stops21h 16m
Air Canada
Deal found 2/3$510
This United Airlines deal was found by Cheapflights users on 2/3. 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.
Wed 9/236:00 pm
PDX
-
BIO
2 stops20h 25m
United Airlines
Thu 10/16:50 am
BIO
-
PDX
2 stops17h 01m
United Airlines
Deal found 2/3$514
This United Airlines deal was found by Cheapflights users on 2/3. 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.
Wed 9/3010:10 am
PDX
-
BIO
2 stops22h 05m
United Airlines
Wed 10/76:50 am
BIO
-
PDX
2 stops21h 16m
United Airlines
Deal found 2/3$522
This United Airlines deal was found by Cheapflights users on 2/3. 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.
Mon 9/286:00 pm
PDX
-
BIO
2 stops20h 25m
United Airlines
Tue 10/66:50 am
BIO
-
PDX
2 stops19h 04m
United Airlines
Deal found 2/3$524
This United Airlines deal was found by Cheapflights users on 2/3. 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.
Tue 9/292:14 pm
PDX
-
BIO
2 stops23h 51m
United Airlines
Wed 10/76:50 am
BIO
-
PDX
2 stops21h 16m
United Airlines
Deal found 2/3$527
This Gotogate deal was found by Cheapflights users on 2/3. 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.
Thu 10/153:30 pm
PDX
-
BIO
2 stops17h 25m
Multiple Airlines
Fri 10/236:50 am
BIO
-
PDX
2 stops21h 16m
Multiple Airlines
Deal found 2/3$528

Find flight deals from Washington to Bilbao

Keep the following information in mind while searching for Washington to Bilbao flight deals. Data was last updated February 4, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$458
(Cheapflightsfares)

One-way from

$303
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$897
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. 17% potential increase in price ($211 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($44 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
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 February 4, 2026.
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 4/15

6:50 pm-11:25 pm

1 stop19h 35m

Bilbao

Wed 4/29

6:50 am-9:53 pm

2 stops24h 03m

$460

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Wed 4/15

8:00 am-11:25 pm

2 stops30h 25m

Bilbao

Wed 4/29

6:50 am-9:53 pm

2 stops48h 03m

$487

PortlandBilbao

PDX - BIO

PDXBIO

Portland

Wed 3/18

1:39 pm-9:55 pm

2 stops24h 16m

Bilbao

Wed 3/25

7:25 am-11:04 pm

2 stops23h 39m

$491

PortlandBilbao

PDX - BIO

PDXBIO

Portland

Wed 4/8

7:15 am-5:15 pm

2 stops25h 00m

Bilbao

Tue 4/21

6:50 am-12:44 am

2 stops26h 54m

$503

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Thu 4/9

7:00 am-11:10 pm

2 stops31h 10m

Bilbao

Wed 4/29

6:50 am-12:20 pm

1 stop14h 30m

$564

PortlandBilbao

PDX - BIO

PDXBIO

Portland

Tue 3/31

1:55 pm-5:30 pm

2 stops18h 35m

Bilbao

Thu 4/9

12:00 pm-10:02 am

2 stops31h 02m

$565

PortlandBilbao

PDX - BIO

PDXBIO

Portland

Mon 3/30

8:05 pm-5:30 pm

2 stops36h 25m

Bilbao

Tue 4/7

12:00 pm-8:59 pm

2 stops41h 59m

$571

PortlandBilbao

PDX - BIO

PDXBIO

Portland

Sun 3/29

7:05 am-4:30 pm

2 stops24h 25m

Bilbao

Wed 4/8

12:00 pm-8:59 pm

2 stops41h 59m

$572

PortlandBilbao

PDX - BIO

PDXBIO

Portland

Tue 5/19

3:25 pm-5:55 pm

2 stops17h 30m

Bilbao

Tue 5/26

6:50 am-11:52 pm

2 stops26h 02m

$580

SeattleBilbao

SEA - BIO

SEABIO

Seattle/Tacoma Intl

Sat 5/2

11:48 pm-11:25 pm

2 stops38h 37m

Bilbao

Fri 5/22

6:50 am-12:20 pm

1 stop14h 30m

$580

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/4

Showing 1-10 of 36 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 $484). 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.

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 18h 35m. Fly via United Airlines, Lufthansa, or Delta 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, 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, January is the cheapest month in which you can book a flight from State of Washington to Bilbao (average of $484). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 February 4, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$484Average$939FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$484Average$898FlexibilityNo cancel feeOn-time76%
KLMCheapest$586Average$1,088FlexibilityNo cancel feeOn-time75%
DeltaCheapest$731Average$1,158FlexibilityNo cancel feeOn-timeN/A

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