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Bilbao

$374+ 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 7/14. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — BIO
Mar 5 — Mar 121
Thu 3/5
Thu 3/12
1 adult, Economy
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Cheap 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 February 3, 2026.

This oojo deal was found by Cheapflights users on 2/1. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/245:25 pm
IAD
-
BIO
1 stop12h 00m
TAP AIR PORTUGAL
Sun 11/296:40 pm
BIO
-
IAD
1 stop26h 35m
TAP AIR PORTUGAL
Deal found 2/1$462
This oojo deal was found by Cheapflights users on 2/1. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/96:30 pm
IAD
-
BIO
1 stop18h 25m
TAP AIR PORTUGAL
Mon 3/167:20 pm
BIO
-
IAD
1 stop25h 15m
TAP AIR PORTUGAL
Deal found 2/1$472
This oojo deal was found by Cheapflights users on 2/2. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/2510:35 pm
IAD
-
BIO
1 stop13h 30m
TAP AIR PORTUGAL
Tue 5/56:50 pm
BIO
-
IAD
1 stop26h 15m
TAP AIR PORTUGAL
Deal found 2/2$492
This oojo deal was found by Cheapflights users on 2/1. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/135:40 pm
IAD
-
BIO
1 stop12h 00m
TAP AIR PORTUGAL
Mon 9/2112:25 pm
BIO
-
IAD
1 stop32h 40m
TAP AIR PORTUGAL
Deal found 2/1$510
This oojo deal was found by Cheapflights users on 1/31. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/2510:35 pm
IAD
-
BIO
1 stop13h 30m
TAP AIR PORTUGAL
Sun 5/37:45 pm
BIO
-
IAD
1 stop30h 50m
TAP AIR PORTUGAL
Deal found 1/31$520
This FlightHub deal was found by Cheapflights users on 2/1. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/3010:35 pm
IAD
-
BIO
1 stop13h 25m
TAP AIR PORTUGAL
Wed 4/812:25 pm
BIO
-
IAD
1 stop32h 40m
TAP AIR PORTUGAL
Deal found 2/1$526
This oojo 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/410:35 pm
IAD
-
BIO
1 stop13h 25m
TAP AIR PORTUGAL
Thu 5/2112:15 pm
BIO
-
IAD
1 stop14h 20m
TAP AIR PORTUGAL
Deal found 2/3$532
This oojo 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/65:45 pm
IAD
-
BIO
1 stop11h 45m
TAP AIR PORTUGAL
Mon 8/3112:25 pm
BIO
-
IAD
1 stop32h 40m
TAP AIR PORTUGAL
Deal found 2/3$539
This Trip.com deal was found by Cheapflights users on 2/2. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/25:30 pm
IAD
-
BIO
2 stops16h 30m
Multiple Airlines
Mon 3/99:05 pm
BIO
-
IAD
2 stops23h 30m
Multiple Airlines
Deal found 2/2$555
This United Airlines deal was found by Cheapflights users on 2/2. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/133:42 pm
BWI
-
BIO
2 stops25h 43m
United Airlines
Thu 4/306:50 am
BIO
-
BWI
2 stops16h 38m
United Airlines
Deal found 2/2$589
This United Airlines deal was found by Cheapflights users on 2/2. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/133:30 pm
DCA
-
BIO
2 stops18h 30m
United Airlines
Thu 4/3011:55 am
BIO
-
DCA
2 stops16h 47m
United Airlines
Deal found 2/2$591
This Expedia deal was found by Cheapflights users on 2/2. 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.
Mon 3/26:14 pm
DCA
-
BIO
2 stops12h 36m
Iberia
Mon 3/99:35 pm
BIO
-
DCA
2 stops24h 02m
Iberia
Deal found 2/2$645

Find 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 February 3, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$472
(oojo)

One-way from

$374

Popular in

June

Cheapest in

October

Average price

$670
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.
Search Deals
From Washington, D.C. (WAS) to Bilbao
Search Deals
One-way flight from Washington, D.C. (WAS) to Bilbao
Search Deals
Highest demand for flights based on searches. 10% potential increase in price ($78 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($10 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, 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 February 3, 2026.
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

Mon 5/4

10:35 pm-6:00 pm

1 stop13h 25m

Bilbao

Thu 5/21

12:15 pm-8:35 pm

1 stop14h 20m

$532

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Mon 3/30

10:35 pm-6:00 pm

1 stop13h 25m

Bilbao

Thu 4/9

12:15 pm-3:05 pm

1 stop32h 50m

$568

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Wed 6/3

5:45 pm-11:30 am

1 stop11h 45m

Bilbao

Tue 6/9

6:50 pm-3:05 pm

1 stop26h 15m

$577

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Wed 3/18

11:55 pm-6:05 pm

1 stop13h 10m

Bilbao

Wed 3/25

7:25 am-9:05 pm

1 stop18h 40m

$626

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Wed 3/11

1:19 pm-11:30 am

2 stops17h 11m

Bilbao

Fri 3/20

6:50 am-5:05 pm

1 stop15h 15m

$628

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Wed 3/18

1:19 pm-11:30 am

2 stops17h 11m

Bilbao

Wed 3/25

6:50 am-5:05 pm

1 stop15h 15m

$628

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Tue 3/31

1:20 pm-5:20 pm

1 stop22h 00m

Bilbao

Thu 4/9

6:15 pm-11:35 am

1 stop23h 20m

$633

Washington, D.C.Bilbao

DCA - BIO

DCABIO

Washington, D.C. Reagan-National

Mon 3/2

6:14 pm-12:50 pm

2 stops12h 36m

Bilbao

Mon 3/9

9:35 pm-4:37 pm

2 stops24h 02m

$645

Washington, D.C.Bilbao

DCA - BIO

DCABIO

Washington, D.C. Reagan-National

Wed 3/18

11:05 am-9:15 pm

3 stops29h 10m

Bilbao

Wed 3/25

10:20 pm-9:56 pm

3 stops28h 36m

$646

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Wed 3/18

9:55 am-9:15 pm

3 stops30h 20m

Bilbao

Wed 3/25

10:20 pm-8:54 pm

3 stops27h 34m

$646

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/3

Showing 1-10 of 38 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 February.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*2 stars
OvagoPrice Accuracy2 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 Washington, D.C.-Bilbao flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Washington, D.C.-Bilbao flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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 January 30, 2026.

The best time to book flights from Washington, D.C. to Bilbao is 32 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 month to book a flight from Washington, D.C. to Bilbao?

Currently, January is the cheapest month in which you can book a flight from Washington, D.C. to Bilbao (average of $337). Flying from Washington, D.C. to Bilbao in July is currently the most expensive (average of $649). 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.

How much does it cost to fly round-trip from Washington, D.C. to Bilbao?

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 February 3, 2026.
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
8,139 reviews

Boarding

8.1

Crew

8.5

Comfort

7.9

Overall

7.9

Entertainment

7.8

Food

7.2

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
8,139 reviews
Delta
7.9
Good
8,139 reviews

Boarding

8.1

Crew

8.5

Comfort

7.9

Overall

7.9

Entertainment

7.8

Food

7.2

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
9,236 reviews
Delta
7.9
Good
8,139 reviews

Boarding

8.1

Crew

8.5

Comfort

7.9

Overall

7.9

Entertainment

7.8

Food

7.2

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
2,133 reviews
Delta
7.9
Good
8,139 reviews

Boarding

8.1

Crew

8.5

Comfort

7.9

Overall

7.9

Entertainment

7.8

Food

7.2

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
3,103 reviews
Delta
7.9
Good
8,139 reviews

Boarding

8.1

Crew

8.5

Comfort

7.9

Overall

7.9

Entertainment

7.8

Food

7.2

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
7,759 reviews
Delta
7.9
Good
8,139 reviews

Boarding

8.1

Crew

8.5

Comfort

7.9

Overall

7.9

Entertainment

7.8

Food

7.2

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 12h 36m. TAP AIR PORTUGAL provides one of the quickest options available for as low as $645. The distance from Washington, D.C. to Bilbao is about 3741 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 $421, TAP AIR PORTUGAL will fly you from Washington, D.C. to Bilbao and back. In addition to TAP AIR PORTUGAL, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Lufthansa and United Airlines - these airlines can fly you to your destination from $470 and $505, respectively. TAP AIR PORTUGAL is currently priced 39% below the average price you’ll pay for this route.

  • 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.

  • What is the cheapest month to book a flight from Washington, D.C. to Bilbao?

    Currently, January is the cheapest month in which you can book a flight from Washington, D.C. to Bilbao (average of $337). Flying from Washington, D.C. to Bilbao in July is currently the most expensive (average of $649). 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, 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 February 3, 2026.
AirlineCheapestAverageFlexibilityOn-time
TAP AIR PORTUGALCheapest$421Average$771FlexibilityNo cancel feeOn-timeN/A
LufthansaCheapest$470Average$763FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$505Average$713FlexibilityNo cancel feeOn-time69%
IberiaCheapest$509Average$590FlexibilityNo cancel feeOn-time77%

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