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Bilbao

$383+ 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 3/25. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — BIO
Nov 12 — Nov 191
Wed 11/12
Wed 11/19
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 October 13, 2025.

This Kiwi.com deal was found by Cheapflights users on 10/12. 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 Kiwi.com 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
Wed 12/31:35 pmBIO - IAD
1 stop12h 30mLufthansa
Deal found 10/12$425
This Cheapflightsfares deal was found by Cheapflights users on 10/11. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/510:55 pmIAD - BIO
1 stop13h 10mLufthansa
Fri 11/146:45 amBIO - IAD
1 stop15h 05mLufthansa
Deal found 10/11$468
This United Airlines deal was found by Cheapflights users on 10/12. 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.
Tue 11/115:40 pmIAD - BIO
1 stop11h 10mMultiple Airlines
Tue 11/186:45 amBIO - IAD
1 stop13h 50mMultiple Airlines
Deal found 10/12$469
This United Airlines deal was found by Cheapflights users on 10/11. 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.
Tue 11/45:40 pmIAD - BIO
1 stop11h 10mUnited Airlines
Wed 11/127:25 amBIO - IAD
1 stop18h 40mUnited Airlines
Deal found 10/11$471
This Air France deal was found by Cheapflights users on 10/13. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/49:25 pmIAD - BIO
1 stop32h 05mMultiple Airlines
Mon 11/105:20 pmBIO - IAD
1 stop28h 45mMultiple Airlines
Deal found 10/13$472
This Booking.com deal was found by Cheapflights users on 10/12. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/261:20 pmIAD - BIO
2 stops20h 50mMultiple Airlines
Wed 12/311:35 amBIO - IAD
1 stop14h 30mMultiple Airlines
Deal found 10/12$473
This Air Canada deal was found by Cheapflights users on 10/11. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/59:45 amIAD - BIO
2 stops26h 20mMultiple Airlines
Fri 11/146:45 amBIO - IAD
2 stops19h 41mMultiple Airlines
Deal found 10/11$475
This United Airlines deal was found by Cheapflights users on 10/11. 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 11/510:55 pmIAD - BIO
1 stop17h 00mUnited Airlines
Fri 11/146:45 amBIO - IAD
2 stops20h 12mUnited Airlines
Deal found 10/11$479
This United Airlines deal was found by Cheapflights users on 10/13. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/45:40 pmIAD - BIO
1 stop11h 10mUnited Airlines
Mon 11/1011:35 amBIO - IAD
2 stops38h 51mUnited Airlines
Deal found 10/13$487
This KAYAK deal was found by Cheapflights users on 10/13. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/48:30 pmIAD - BIO
2 stops39h 35mSWISS
Mon 11/1011:35 amBIO - IAD
2 stops35h 05mSWISS
Deal found 10/13$499
This Booking.com deal was found by Cheapflights users on 10/11. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/810:55 pmIAD - BIO
1 stop13h 10mLufthansa
Sat 11/156:45 amBIO - IAD
1 stop15h 05mLufthansa
Deal found 10/11$513

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 October 13, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$425
(Kiwi.com)

One-way from

$383
(Kiwi.com)

Popular in

June

Cheapest in

September

Average price

$583
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.
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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. 20% potential increase in price ($183 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($37 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 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 October 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

Wed 11/5

10:55 pm-6:05 pm

1 stop13h 10m

Bilbao

Fri 11/14

6:45 am-3:50 pm

1 stop15h 05m

$468

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Tue 11/11

5:40 pm-10:50 am

1 stop11h 10m

Bilbao

Tue 11/18

6:45 am-2:35 pm

1 stop13h 50m

$469

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Tue 11/4

5:40 pm-10:50 am

1 stop11h 10m

Bilbao

Wed 11/12

7:25 am-8:05 pm

1 stop18h 40m

$471

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Tue 11/4

9:25 pm-11:30 am

1 stop32h 05m

Bilbao

Mon 11/10

5:20 pm-4:05 pm

1 stop28h 45m

$472

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Wed 11/5

10:55 pm-9:55 pm

1 stop17h 00m

Bilbao

Fri 11/14

6:45 am-8:57 pm

2 stops20h 12m

$479

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Tue 11/4

5:40 pm-10:50 am

1 stop11h 10m

Bilbao

Mon 11/10

11:35 am-8:26 pm

2 stops38h 51m

$487

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Tue 11/4

8:30 pm-6:05 pm

2 stops39h 35m

Bilbao

Mon 11/10

11:35 am-4:40 pm

2 stops35h 05m

$499

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Tue 11/4

8:30 pm-6:05 pm

2 stops39h 35m

Bilbao

Wed 11/12

11:35 am-4:40 pm

2 stops35h 05m

$499

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Sat 11/8

10:55 pm-6:05 pm

1 stop13h 10m

Bilbao

Sat 11/15

6:45 am-3:50 pm

1 stop15h 05m

$513

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Thu 3/12

7:05 pm-11:20 am

1 stop11h 15m

Bilbao

Mon 3/16

12:15 pm-5:35 pm

1 stop34h 20m

$545

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/12

Showing 1-10 of 12 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 October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Washington, D.C. Dulles Intl Airport-Bilbao flight deals on Cheapflights vs. FlightHub >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 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. 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.

Cheapflights Insights

Everything you need to know about your flight from Washington, D.C. Dulles Intl Airport to Bilbao

How much does it cost to fly round-trip from Washington, D.C. Dulles Intl Airport 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 October 13, 2025.
Get a feel of what it's like to fly with KLM, United Airlines, and TAP AIR PORTUGAL 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
1,402 reviews

Crew

8.4

Food

7.2

Overall

7.7

Entertainment

7.1

Boarding

7.8

Comfort

7.6

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
1,402 reviews
KLM
7.7
Good
1,402 reviews

Crew

8.4

Food

7.2

Overall

7.7

Entertainment

7.1

Boarding

7.8

Comfort

7.6

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
8,973 reviews
KLM
7.7
Good
1,402 reviews

Crew

8.4

Food

7.2

Overall

7.7

Entertainment

7.1

Boarding

7.8

Comfort

7.6

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.
TAP AIR PORTUGAL
7.1
Good
2,009 reviews
KLM
7.7
Good
1,402 reviews

Crew

8.4

Food

7.2

Overall

7.7

Entertainment

7.1

Boarding

7.8

Comfort

7.6

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
2,986 reviews
KLM
7.7
Good
1,402 reviews

Crew

8.4

Food

7.2

Overall

7.7

Entertainment

7.1

Boarding

7.8

Comfort

7.6

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
7,479 reviews
KLM
7.7
Good
1,402 reviews

Crew

8.4

Food

7.2

Overall

7.7

Entertainment

7.1

Boarding

7.8

Comfort

7.6

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 5 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 $471, Lufthansa 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 TAP AIR PORTUGAL. Our recent data shows that you can find tickets from as low as $447 on this airline. Additional options worth looking into are Lufthansa and KLM, starting at $492 and $503 round-trip. These flights start at 38% 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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Top 5 airlines flying from Dulles Intl to Bilbao

Discover the top 5 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 October 13, 2025.
AirlineCheapestAverageFlexibilityOn-time
TAP AIR PORTUGALCheapest$447Average$721FlexibilityNo cancel feeOn-timeN/A
LufthansaCheapest$492Average$765FlexibilityNo cancel feeOn-time76%
KLMCheapest$503Average$750FlexibilityNo cancel feeOn-time75%
IberiaCheapest$509Average$590FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$514Average$736FlexibilityNo cancel feeOn-time69%

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