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$344+ Cheap flights from Washington, D.C. (WAS) 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 3/18. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — BIO
Dec 4 — Dec 111
Thu 12/4
Thu 12/11
1 adult, Economy
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Cheapflights Tip: The best prices from Washington, D.C. to Bilbao are usually found in February or October, booked 34 days in advance, depart on a Monday or Tuesday and return on a Monday

Cheap flight deals from Washington, D.C. to Bilbao

Discover tips and strategies to find the most affordable flight options for your journey from Washington, D.C. (WAS) 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 November 4, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$470
(United Airlines)

One-way from

$344
(Mytrip)

Popular in

December

Cheapest in

February

Average price

$741
Provider with most accurate pricing for Washington, D.C. (WAS)-Bilbao flight deals.
Search Deals
Provider most trusted by Cheapflights users for Washington, D.C. (WAS)-Bilbao flights.
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From Washington, D.C. (WAS) to Bilbao
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One-way flight from Washington, D.C. (WAS) to Bilbao
Search Deals
Highest demand for flights based on searches. 4% potential increase in price ($35 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($15 potential savings vs. average RT price).
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Average for round-trip flights in November 2025
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Find flight deals from Washington, D.C. to Bilbao

Cheapest flights from Washington, D.C. to Bilbao
Explore the most affordable flight options available from Washington, D.C. to Bilbao. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 4, 2025.

This KLM 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/106:05 pmIAD - BIO
1 stop11h 15mKLM
Tue 12/1611:55 amBIO - IAD
1 stop34h 10mKLM
Deal found 11/3$476
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/1012:19 pmIAD - BIO
2 stops17h 01mDelta
Tue 12/166:50 amBIO - IAD
1 stop15h 15mDelta
Deal found 11/3$481
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/107:40 pmIAD - BIO
2 stops17h 05mMultiple Airlines
Tue 12/167:10 amBIO - IAD
2 stops17h 20mMultiple Airlines
Deal found 11/3$489
This Turkish Airlines 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 Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/121:30 pmIAD - BIO
1 stop20h 40mTurkish Airlines
Tue 11/2512:00 pmBIO - IAD
1 stop29h 45mTurkish Airlines
Deal found 11/2$586
This KLM 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/59:25 pmIAD - BIO
1 stop13h 55mKLM
Wed 11/1211:55 amBIO - IAD
1 stop34h 10mKLM
Deal found 11/3$619
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1212:37 pmIAD - BIO
2 stops16h 53mDelta
Tue 11/256:50 amBIO - IAD
1 stop15h 15mDelta
Deal found 11/2$624
This FlightHub 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/141:30 pmIAD - BIO
1 stop15h 30mTurkish Airlines
Wed 11/195:10 pmBIO - IAD
1 stop24h 35mTurkish Airlines
Deal found 11/3$625
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/55:12 pmBWI - BIO
2 stops22h 43mUnited Airlines
Wed 11/1212:50 pmBIO - BWI
2 stops27h 09mUnited Airlines
Deal found 11/3$632
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/52:00 pmDCA - BIO
2 stops20h 10mUnited Airlines
Wed 11/127:25 amBIO - DCA
2 stops21h 10mUnited Airlines
Deal found 11/3$633
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/512:40 pmIAD - BIO
2 stops21h 30mUnited Airlines
Wed 11/127:25 amBIO - IAD
2 stops19h 55mUnited Airlines
Deal found 11/3$633
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1212:15 pmBWI - BIO
2 stops17h 15mDelta
Tue 11/2511:55 amBIO - BWI
2 stops18h 31mDelta
Deal found 11/2$634
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/146:50 pmIAD - BIO
1 stop16h 30mDelta
Wed 11/1911:55 amBIO - IAD
2 stops17h 08mDelta
Deal found 11/3$679

Cheapflights Fare Finder

 
Customize your flight search to find flights from Washington, D.C. 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 4, 2025.
Use the filters below to find and compare flights from Washington, D.C. to Bilbao that are best for you.

Fly from

Washington, D.C.

Fly to

Bilbao

Route

Depart

Return

Price

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Wed 1/7

10:55 pm-6:05 pm

1 stop13h 10m

Bilbao

Thu 2/5

12:50 pm-8:15 pm

1 stop13h 25m

$470

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Wed 1/7

10:55 pm-6:05 pm

1 stop13h 10m

Bilbao

Fri 2/6

12:50 pm-8:15 pm

1 stop13h 25m

$470

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Wed 12/10

6:05 pm-4:30 pm

1 stop16h 25m

Bilbao

Tue 12/16

11:55 am-4:05 pm

1 stop34h 10m

$476

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Wed 12/10

12:19 pm-11:20 am

2 stops17h 01m

Bilbao

Tue 12/16

6:50 am-4:05 pm

1 stop15h 15m

$481

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Wed 1/7

10:55 pm-6:05 pm

1 stop13h 10m

Bilbao

Tue 2/10

11:35 am-5:35 pm

2 stops36h 00m

$483

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Wed 1/7

5:20 pm-6:05 pm

2 stops18h 45m

Bilbao

Mon 2/9

11:35 am-3:35 pm

1 stop34h 00m

$486

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Wed 1/7

5:20 pm-6:05 pm

2 stops18h 45m

Bilbao

Wed 2/4

11:35 am-5:35 pm

2 stops36h 00m

$488

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Wed 12/10

7:40 pm-6:45 pm

2 stops17h 05m

Bilbao

Tue 12/16

7:10 am-6:30 pm

2 stops17h 20m

$489

BaltimoreBilbao

BWI - BIO

BWIBIO

Baltimore/Washington

Wed 1/7

3:38 pm-4:30 pm

2 stops18h 52m

Bilbao

Fri 2/6

6:50 am-7:12 pm

2 stops18h 22m

$491

BaltimoreBilbao

BWI - BIO

BWIBIO

Baltimore/Washington

Wed 1/7

3:38 pm-4:30 pm

2 stops18h 52m

Bilbao

Tue 2/10

6:50 am-5:48 pm

2 stops16h 58m

$491

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/1

Showing 1-10 of 58 results
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Compare providers for flights from Washington, D.C. 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 Washington, D.C. to Bilbao in November.
ProviderPrice AccuracyTrust Score*
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
OvagoPrice Accuracy2 starsTrust Score*2 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 Washington, D.C.-Bilbao flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Washington, D.C.-Bilbao flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Washington, D.C.-Bilbao flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Washington, D.C.-Bilbao flights, Cheapflights users trust eDreams the most. eDreams 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 Washington, D.C.-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 Washington, D.C. to Bilbao

Have a flexible travel schedule? Discover the best time to fly to Bilbao from Washington, D.C. 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, D.C. to Bilbao

How far ahead should I book a flight from Washington, D.C. to Bilbao?

Use this chart to determine the optimal time to book a round-trip flight from Washington, D.C. to Bilbao. Price data was last updated on October 31, 2025.

The best time to book flights from Washington, D.C. to Bilbao is 34 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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

Find hourly flight availability from Washington, D.C. 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 4, 2025.

It’s typically best to fly out from Washington, D.C. to Bilbao in the evening. Doing so could potentially save you 28% on the flight price compared to flying in the morning, which is usually more expensive.

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 November 4, 2025.
See what other customers who have flown with Delta, United Airlines, and TAP AIR PORTUGAL from Washington, D.C. to Bilbao have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,002 reviews

Comfort

7.9

Boarding

8.2

Food

7.3

Entertainment

7.9

Crew

8.5

Overall

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,002 reviews
Delta
7.9
Good
8,002 reviews

Comfort

7.9

Boarding

8.2

Food

7.3

Entertainment

7.9

Crew

8.5

Overall

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
United Airlines
7.4
Good
8,999 reviews
Delta
7.9
Good
8,002 reviews

Comfort

7.9

Boarding

8.2

Food

7.3

Entertainment

7.9

Crew

8.5

Overall

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
TAP AIR PORTUGAL
7.1
Good
2,046 reviews
Delta
7.9
Good
8,002 reviews

Comfort

7.9

Boarding

8.2

Food

7.3

Entertainment

7.9

Crew

8.5

Overall

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Iberia
7.0
Good
3,006 reviews
Delta
7.9
Good
8,002 reviews

Comfort

7.9

Boarding

8.2

Food

7.3

Entertainment

7.9

Crew

8.5

Overall

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Lufthansa
6.8
Okay
7,547 reviews
Delta
7.9
Good
8,002 reviews

Comfort

7.9

Boarding

8.2

Food

7.3

Entertainment

7.9

Crew

8.5

Overall

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

Related info for your journey

Find useful and relevant information for your journey from Washington, D.C. 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, D.C.?

    If you book a flight to Bilbao from Washington, D.C., you will be flying to Bilbao, which is the city’s only airport. Bilbao (BIO) is located 3.0 mi from the center of Bilbao. There are 0 flights from Washington, D.C. to Bilbao per day from 4 different airlines.

  • How long is the flight from Washington, D.C. to Bilbao?

    A quick flight from Washington, D.C. to Bilbao can take about 13h 10m. United Airlines provides one of the quickest options available for as low as $470. The distance from Washington, D.C. to Bilbao is about 3757 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines flying from Washington, D.C. to Bilbao round-trip?

    Currently priced at $492, Lufthansa will fly you from Washington, D.C. to Bilbao and back. In addition to Lufthansa, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from KLM and Iberia - these airlines can fly you to your destination from $503 and $509, respectively. Lufthansa is currently priced 31% below the average price you’ll pay for this route.

  • What are the cheapest airlines to fly from Washington, D.C. to Bilbao one-way?

    The cheapest airline one-way is TAP AIR PORTUGAL, with whom users have recently found tickets for as low as $385. However, be on the lookout for offers from Air Canada and United Airlines, as they are both options that can get you from Washington, D.C. to Bilbao for a low price.

  • What are the most popular routes from Washington, D.C. to Bilbao?

    While some choose either Washington, D.C. Reagan-National - Bilbao or Baltimore/Washington - Bilbao, Washington, D.C. Dulles Intl - Bilbao is the most popular route from Washington, D.C. to Bilbao.

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

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

  • How can I find direct flights from Washington, D.C. to Bilbao?

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

  • Can I find deals for business class flights from Washington, D.C. to Bilbao?

    Yes. Cheapflights offers flight deals from Washington, D.C. 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.

See more FAQs

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Alternative routes for Washington, D.C. to Bilbao

See prices for flight routes from nearby airports that may be better suited for you.
Dulles Intl to Bilbao flights
Reagan-National to Bilbao flights
Dulles Intl to San Sebastian flights
Reagan-National to San Sebastian flights

Top 4 airlines flying from Washington, D.C. to Bilbao

Discover the top 4 airlines that operate flights from Washington, D.C. 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 4, 2025.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest$492Average$765FlexibilityNo cancel feeOn-time76%
KLMCheapest$503Average$750FlexibilityNo cancel feeOn-time75%
IberiaCheapest$509Average$590FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$514Average$688FlexibilityNo cancel feeOn-time69%

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