HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Dulles Intl

$405+ Cheap flights from Bilbao (BIO) to Dulles Intl (IAD)

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 1/17. Fares are subject to change and may not be available on all flights or dates of travel.
BIO — IAD
Jan 11 — Jan 181
Sun 1/11
Sun 1/18
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Bilbao to Dulles Intl with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Bilbao to Dulles Intl

Cheapest flights from Bilbao to Dulles Intl
Explore the most affordable flight options available from Bilbao to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 12, 2025.

This Lufthansa deal was found by Cheapflights users on 12/10. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/2412:50 pmBIO - IAD
1 stop13h 25mLufthansa
Thu 1/810:55 pmIAD - BIO
1 stop17h 00mLufthansa
Deal found 12/10$567
This United Airlines deal was found by Cheapflights users on 12/10. 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 12/2412:50 pmBIO - IAD
1 stop13h 25mUnited Airlines
Thu 1/810:00 pmIAD - BIO
1 stop12h 40mUnited Airlines
Deal found 12/10$578
This Kiwi.com deal was found by Cheapflights users on 12/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/2412:50 pmBIO - IAD
1 stop13h 25mLufthansa
Wed 1/710:55 pmIAD - BIO
1 stop13h 10mLufthansa
Deal found 12/10$582
This Lufthansa deal was found by Cheapflights users on 12/10. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/256:50 pmBIO - IAD
1 stop26h 45mLufthansa
Thu 1/810:55 pmIAD - BIO
1 stop17h 00mLufthansa
Deal found 12/10$590
This United Airlines deal was found by Cheapflights users on 12/10. 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 12/2412:50 pmBIO - IAD
2 stops33h 34mUnited Airlines
Wed 1/75:40 pmIAD - BIO
1 stop11h 10mUnited Airlines
Deal found 12/10$594
This United Airlines deal was found by Cheapflights users on 12/10. 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 12/2412:50 pmBIO - IAD
1 stop13h 25mUnited Airlines
Sat 1/1012:40 pmIAD - BIO
2 stops16h 10mUnited Airlines
Deal found 12/10$606
This United Airlines deal was found by Cheapflights users on 12/10. 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 12/2412:50 pmBIO - IAD
1 stop13h 25mUnited Airlines
Fri 1/98:20 amIAD - BIO
2 stops21h 40mUnited Airlines
Deal found 12/10$607

Find flight deals from Bilbao to Dulles Intl

Discover tips and strategies to find the most affordable flight options for your journey from Bilbao (BIO) to Dulles Intl (IAD). 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 December 12, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$459
(American Airlines)

One-way from

$405
(Kiwi.com)

Popular in

January

Cheapest in

October

Average price

$668
Provider with most accurate pricing for Bilbao-Washington, D.C. Dulles Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Bilbao-Washington, D.C. Dulles Intl flights.
Search Deals
From Bilbao to Washington, D.C. Dulles Intl
Search Deals
One-way flight from Bilbao to Washington, D.C. Dulles Intl
Search Deals
Highest demand for flights based on searches. 14% potential increase in price ($104 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 8% potential price decrease ($48 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Bilbao to Dulles Intl 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 December 12, 2025.
Use the filters below to find and compare flights from Bilbao to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Bilbao

Fly to

Dulles Intl

Route

Depart

Return

Price

BilbaoWashington, D.C.

BIO - IAD

BIOIAD

Bilbao

Thu 1/15

6:50 am-4:05 pm

1 stop15h 15m

Washington, D.C. Dulles Intl

Tue 1/20

5:26 pm-5:20 pm

2 stops17h 54m

$551

BilbaoWashington, D.C.

BIO - IAD

BIOIAD

Bilbao

Thu 1/29

12:50 pm-8:15 pm

1 stop13h 25m

Washington, D.C. Dulles Intl

Mon 2/2

5:45 pm-4:40 pm

2 stops16h 55m

$598

BilbaoWashington, D.C.

BIO - IAD

BIOIAD

Bilbao

Wed 12/24

12:50 pm-8:15 pm

1 stop13h 25m

Washington, D.C. Dulles Intl

Sat 1/10

12:40 pm-10:50 am

2 stops16h 10m

$606

BilbaoWashington, D.C.

BIO - IAD

BIOIAD

Bilbao

Thu 12/25

6:50 pm-3:35 pm

1 stop26h 45m

Washington, D.C. Dulles Intl

Wed 1/7

5:40 pm-10:50 am

1 stop11h 10m

$611

BilbaoWashington, D.C.

BIO - IAD

BIOIAD

Bilbao

Sat 12/27

7:25 am-3:35 pm

1 stop14h 10m

Washington, D.C. Dulles Intl

Fri 1/9

8:20 am-12:00 pm

2 stops21h 40m

$648

BilbaoWashington, D.C.

BIO - IAD

BIOIAD

Bilbao

Sun 4/5

7:15 am-7:25 pm

1 stop18h 10m

Washington, D.C. Dulles Intl

Sat 4/11

10:20 pm-11:25 pm

1 stop19h 05m

$714

BilbaoWashington, D.C.

BIO - IAD

BIOIAD

Bilbao

Tue 12/23

12:50 pm-2:35 pm

1 stop31h 45m

Washington, D.C. Dulles Intl

Thu 1/8

10:55 pm-9:55 pm

1 stop17h 00m

$730

BilbaoWashington, D.C.

BIO - IAD

BIOIAD

Bilbao

Wed 12/24

7:25 am-4:35 pm

1 stop15h 10m

Washington, D.C. Dulles Intl

Thu 1/1

6:50 pm-11:30 am

1 stop10h 40m

$772

BilbaoWashington, D.C.

BIO - IAD

BIOIAD

Bilbao

Thu 12/25

12:15 pm-10:52 pm

2 stops16h 37m

Washington, D.C. Dulles Intl

Wed 1/7

6:15 pm-5:20 pm

2 stops17h 05m

$778

BilbaoWashington, D.C.

BIO - IAD

BIOIAD

Bilbao

Wed 12/24

12:50 pm-8:15 pm

1 stop13h 25m

Washington, D.C. Dulles Intl

Tue 12/30

10:15 pm-11:20 pm

2 stops43h 05m

$781

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/10

Showing 1-10 of 20 results
1
2

Compare providers for flights from Bilbao to Dulles Intl

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 Bilbao to Dulles Intl in December.
ProviderPrice AccuracyTrust Score*
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star

*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 Bilbao-Washington, D.C. Dulles Intl Airport flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Bilbao-Washington, D.C. Dulles Intl Airport flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Bilbao-Washington, D.C. Dulles Intl Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Bilbao-Washington, D.C. Dulles Intl Airport 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 Bilbao-Washington, D.C. Dulles Intl Airport 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 Bilbao to Dulles Intl

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

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

Currently, October is the cheapest month in which you can book a flight from Bilbao to Washington, D.C. Dulles Intl Airport (average of $376). Flying from Bilbao to Washington, D.C. Dulles Intl Airport in January is currently the most expensive (average of $931). 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 Bilbao to Dulles Intl. 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 from for flights from Bilbao to Washington, D.C. Dulles Intl?

    Bilbao (BIO) is the airport you will fly out of if you book a flight from Bilbao to Washington, D.C. Dulles Intl. You should not have trouble finding flights to Washington, D.C. Dulles Intl from Bilbao; the airport handles an average of 0 outbound flights to Washington, D.C. Dulles Intl per day. You should also have plenty of airline options to choose from since 0 airlines have flights from the Bilbao airport to Washington, D.C. Dulles Intl. It is only a 3.0 mi journey to Bilbao (BIO) from Bilbao’s city center.

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

    Airlines like Delta, United Airlines, and Lufthansa fly from Bilbao to Washington, D.C. Dulles Intl Airport in about 13h 25m. The time it takes to get you to your destination can typically vary by up to 13h 20m. Airlines will cover a distance of 3757 mi. This flight may include one or multiple stops.

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

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

  • How can I find direct flights from Bilbao to Dulles Intl?

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

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

    Yes. Cheapflights offers flight deals from Bilbao to Dulles Intl 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 Bilbao to Washington, D.C. Dulles Intl Airport?

    Currently, October is the cheapest month in which you can book a flight from Bilbao to Washington, D.C. Dulles Intl Airport (average of $376). Flying from Bilbao to Washington, D.C. Dulles Intl Airport in January is currently the most expensive (average of $931). 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

Traveling to a place near Washington, D.C. Dulles Intl Airport?

Book flights to Washington, D.C. Dulles Intl Airport if you plan to visit one of these locations
Alexandria
Woodbridge
Tysons
Arlington
Owings Mills
Springfield
Hanover
Silver Spring
Fredericksburg
Fairfax
Linthicum Heights
Manassas
Rockville
Laurel
Towson
National Harbor
Bowie
Largo
McLean
Clinton

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 Bilbao to Dulles Intl

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

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.