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Bilbao

$372+ Cheap flights from Dulles Intl (IAD) 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 1/6. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — BIO
Dec 13 — Dec 201
Sat 12/13
Sat 12/20
1 adult, Economy
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Find flight deals from Dulles Intl to Bilbao

Cheapest flights from Dulles Intl to Bilbao
Explore the most affordable flight options available from Dulles Intl to Bilbao. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 13, 2025.

This Mytrip deal was found by Cheapflights users on 11/11. 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 12/39:45 amIAD - BIO
2 stops24h 25mMultiple Airlines
Wed 12/107:25 amBIO - IAD
1 stop18h 40mMultiple Airlines
Deal found 11/11$456
This KLM deal was found by Cheapflights users on 11/11. 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 12/36:50 pmIAD - BIO
1 stop10h 40mKLM
Wed 12/1011:55 amBIO - IAD
1 stop34h 10mKLM
Deal found 11/11$470
This United Airlines deal was found by Cheapflights users on 11/11. 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 12/31:10 pmIAD - BIO
2 stops28h 10mUnited Airlines
Wed 12/1012:50 pmBIO - IAD
2 stops33h 10mUnited Airlines
Deal found 11/11$496
This TAP AIR PORTUGAL deal was found by Cheapflights users on 11/13. 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 TAP AIR PORTUGAL is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/1010:30 pmIAD - BIO
1 stop37h 25mTAP AIR PORTUGAL
Sun 12/146:40 pmBIO - IAD
1 stop26h 35mTAP AIR PORTUGAL
Deal found 11/13$500
This United Airlines deal was found by Cheapflights users on 11/12. 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 12/109:00 amIAD - BIO
2 stops21h 05mUnited Airlines
Sun 12/146:45 amBIO - IAD
1 stop15h 05mUnited Airlines
Deal found 11/12$538
This Delta deal was found by Cheapflights users on 11/13. 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
Sun 12/146:50 amBIO - IAD
1 stop15h 15mDelta
Deal found 11/13$606
This Mytrip deal was found by Cheapflights users on 11/12. 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.
Fri 12/125:05 pmIAD - BIO
3 stops33h 30mMultiple Airlines
Wed 12/177:10 amBIO - IAD
2 stops18h 20mMultiple Airlines
Deal found 11/12$672
This Mytrip deal was found by Cheapflights users on 11/12. 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
3 stops30h 00mMultiple Airlines
Sun 12/141:50 pmBIO - IAD
2 stops34h 40mMultiple Airlines
Deal found 11/12$682
This Expedia deal was found by Cheapflights users on 11/11. 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.
Wed 11/2610:55 pmIAD - BIO
1 stop17h 00mLufthansa
Sun 11/306:50 pmBIO - IAD
2 stops51h 00mLufthansa
Deal found 11/11$700
This oojo deal was found by Cheapflights users on 11/13. 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.
Thu 11/135:30 pmIAD - BIO
1 stop18h 25mTAP AIR PORTUGAL
Mon 11/177:20 pmBIO - IAD
1 stop25h 15mTAP AIR PORTUGAL
Deal found 11/13$706

Cheap flight deals from Dulles Intl to Bilbao

Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) 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 13, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$456
(Mytrip)

One-way from

$372
(Kiwi.com)

Popular in

June

Cheapest in

September

Average price

$661
Provider with most accurate pricing for Washington, D.C. Dulles Intl-Bilbao flight deals.
Search Deals
Provider most trusted by Cheapflights users for Washington, D.C. Dulles Intl-Bilbao flights.
Search Deals
From Washington, D.C. Dulles Intl to Bilbao
Search Deals
One-way flight from Washington, D.C. Dulles Intl to Bilbao
Search Deals
Highest demand for flights based on searches. 23% potential increase in price ($214 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($39 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 Dulles Intl 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 13, 2025.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Bilbao that are best for you.

Fly from

Dulles Intl

Fly to

Bilbao

Route

Depart

Return

Price

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Tue 1/13

6:50 pm-5:20 pm

1 stop16h 30m

Bilbao

Wed 1/28

7:25 am-4:35 pm

1 stop15h 10m

$476

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Tue 1/13

5:40 pm-10:50 am

1 stop11h 10m

Bilbao

Fri 1/30

6:45 am-8:59 pm

2 stops20h 14m

$481

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Sun 1/11

10:55 pm-6:05 pm

1 stop13h 10m

Bilbao

Mon 2/2

11:35 am-3:35 pm

1 stop34h 00m

$483

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Tue 1/13

6:20 pm-9:55 pm

2 stops21h 35m

Bilbao

Wed 1/28

11:35 am-3:35 pm

1 stop34h 00m

$496

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Tue 1/13

6:20 pm-9:55 pm

2 stops21h 35m

Bilbao

Mon 2/2

11:35 am-3:35 pm

1 stop34h 00m

$496

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Wed 12/10

10:30 pm-5:55 pm

1 stop37h 25m

Bilbao

Sun 12/14

6:40 pm-3:15 pm

1 stop26h 35m

$500

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Mon 1/12

8:20 am-4:40 pm

2 stops26h 20m

Bilbao

Mon 2/2

11:35 am-3:35 pm

1 stop34h 00m

$500

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Mon 1/12

8:20 am-4:40 pm

2 stops26h 20m

Bilbao

Wed 1/28

11:35 am-3:35 pm

1 stop34h 00m

$500

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Mon 5/4

10:20 pm-11:25 pm

1 stop19h 05m

Bilbao

Thu 5/21

6:45 am-1:30 pm

1 stop12h 45m

$522

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Mon 1/12

5:40 pm-10:50 am

1 stop11h 10m

Bilbao

Sat 1/31

7:25 am-3:35 pm

1 stop14h 10m

$523

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/11

Showing 1-10 of 19 results
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Compare providers for flights from Dulles Intl 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 Dulles Intl to Bilbao in November.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
AranGrantPrice Accuracy2 starsTrust Score*3 stars
eDreamsPrice Accuracy3 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. Dulles Intl Airport-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. Dulles Intl Airport-Bilbao flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Washington, D.C. Dulles Intl Airport-Bilbao flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Washington, D.C. Dulles Intl Airport-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. Dulles Intl Airport-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 Dulles Intl to Bilbao

Have a flexible travel schedule? Discover the best time to fly to Bilbao from Dulles Intl 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.

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 13, 2025.
Get a feel of what it's like to fly with KLM, United Airlines, and Iberia from Washington, D.C. Dulles Intl Airport to Bilbao by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.7
Good
1,411 reviews

Comfort

7.7

Crew

8.4

Food

7.3

Boarding

7.8

Entertainment

7.1

Overall

7.7

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
KLM
7.7
Good
1,411 reviews
KLM
7.7
Good
1,411 reviews

Comfort

7.7

Crew

8.4

Food

7.3

Boarding

7.8

Entertainment

7.1

Overall

7.7

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
United Airlines
7.4
Good
9,017 reviews
KLM
7.7
Good
1,411 reviews

Comfort

7.7

Crew

8.4

Food

7.3

Boarding

7.8

Entertainment

7.1

Overall

7.7

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
Iberia
7.0
Good
3,012 reviews
KLM
7.7
Good
1,411 reviews

Comfort

7.7

Crew

8.4

Food

7.3

Boarding

7.8

Entertainment

7.1

Overall

7.7

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
Lufthansa
6.8
Okay
7,572 reviews
KLM
7.7
Good
1,411 reviews

Comfort

7.7

Crew

8.4

Food

7.3

Boarding

7.8

Entertainment

7.1

Overall

7.7

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.

Related info for your journey

Find useful and relevant information for your journey from Dulles Intl 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. Dulles Intl?

    Most people fly into Bilbao (BIO) if they book a flight to Bilbao from Washington, D.C. Dulles Intl. On average, Bilbao has 0 inbound flights from Washington, D.C. Dulles Intl per day from 4 airlines. Bilbao is conveniently located just 3.0 mi from Bilbao’s city center.

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

    For as low as $481, Delta can have you in Bilbao from Washington, D.C. Dulles Intl Airport in 11h 10m. The distance between Washington, D.C. Dulles Intl Airport and Bilbao is about 3757 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    Our cheapest airline available from Washington, D.C. Dulles Intl Airport to Bilbao is Lufthansa. Our recent data shows that you can find tickets from as low as $492 on this airline. Additional options worth looking into are KLM and Iberia, starting at $503 and $509 round-trip. These flights start at 29% lower than the current average price 3 months from now.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Dulles Intl 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 Dulles Intl to Bilbao

See prices for flight routes from nearby airports that may be better suited for you.
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Reagan-National to Bilbao flights
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Top 4 airlines flying from Dulles Intl to Bilbao

Discover the top 4 airlines that operate flights from Dulles Intl 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 13, 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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