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Bilbao

$581+ Cheap flights from Dulles Intl (IAD) to Bilbao (BIO)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/11. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — BIO
Jan 26 — Feb 21
Mon 1/26
Mon 2/2
1 adult, Economy
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Cheap flight deals from Dulles Intl to Bilbao

Best flights from Dulles Intl to Bilbao
Discover carefully curated flight deals from Dulles Intl to Bilbao that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 27, 2025.

This Delta deal was found by Cheapflights users on 12/25. 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 3/111:19 pmIAD - BIO
2 stops17h 01mDelta
Fri 3/206:50 amBIO - IAD
1 stop15h 15mDelta
Deal found 12/25$581
This eDestinos deal was found by Cheapflights users on 12/26. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 1/251:30 pmIAD - BIO
1 stop15h 30mTurkish Airlines
Sun 2/15:10 pmBIO - IAD
1 stop24h 35mTurkish Airlines
Deal found 12/26$593
This FlightHub deal was found by Cheapflights users on 12/25. 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.
Wed 5/205:45 pmIAD - BIO
1 stop11h 45mTAP AIR PORTUGAL
Thu 6/1812:15 pmBIO - IAD
1 stop14h 20mTAP AIR PORTUGAL
Deal found 12/25$593
This Cheapflightsfares deal was found by Cheapflights users on 12/25. 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.
Mon 3/210:15 pmIAD - BIO
2 stops18h 50mLufthansa
Sun 3/156:45 amBIO - IAD
1 stop19h 30mLufthansa
Deal found 12/25$602
This FlightHub deal was found by Cheapflights users on 12/25. 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.
Tue 5/1910:35 pmIAD - BIO
1 stop30h 55mTAP AIR PORTUGAL
Thu 6/1812:15 pmBIO - IAD
1 stop14h 20mTAP AIR PORTUGAL
Deal found 12/25$597
This Cheapflightsfares deal was found by Cheapflights users on 12/26. 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.
Sat 2/285:40 pmIAD - BIO
1 stop18h 25mLufthansa
Sun 3/86:45 amBIO - IAD
1 stop13h 50mLufthansa
Deal found 12/26$636
This oojo deal was found by Cheapflights users on 12/25. 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 6/85:40 pmIAD - BIO
1 stop18h 20mTAP AIR PORTUGAL
Mon 6/1512:25 pmBIO - IAD
1 stop14h 10mTAP AIR PORTUGAL
Deal found 12/25$624
This KAYAK deal was found by Cheapflights users on 12/25. 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.
Sun 5/175:40 pmIAD - BIO
1 stop12h 00mTAP AIR PORTUGAL
Wed 6/1712:25 pmBIO - IAD
1 stop14h 10mTAP AIR PORTUGAL
Deal found 12/25$657
This KAYAK deal was found by Cheapflights users on 12/25. 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 5/1910:35 pmIAD - BIO
1 stop30h 55mTAP AIR PORTUGAL
Wed 6/1712:25 pmBIO - IAD
1 stop14h 10mTAP AIR PORTUGAL
Deal found 12/25$661

Find 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 December 27, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$459
(oojo)

Popular in

June

Cheapest in

September

Average price

$660
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
Highest demand for flights based on searches. 21% potential increase in price ($191 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($33 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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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 December 27, 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 3/11

1:19 pm-11:20 am

2 stops17h 01m

Bilbao

Fri 3/20

6:50 am-5:05 pm

1 stop15h 15m

$581

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Sun 1/25

1:30 pm-11:00 am

1 stop15h 30m

Bilbao

Sun 2/1

5:10 pm-11:45 am

1 stop24h 35m

$593

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Wed 5/20

5:45 pm-11:30 am

1 stop11h 45m

Bilbao

Thu 6/18

12:15 pm-8:35 pm

1 stop14h 20m

$593

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Tue 5/19

10:35 pm-11:30 am

1 stop30h 55m

Bilbao

Thu 6/18

12:15 pm-8:35 pm

1 stop14h 20m

$597

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Mon 3/2

10:15 pm-11:05 pm

2 stops18h 50m

Bilbao

Sun 3/15

6:45 am-9:15 pm

1 stop19h 30m

$602

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Mon 6/8

5:40 pm-6:00 pm

1 stop18h 20m

Bilbao

Mon 6/15

12:25 pm-8:35 pm

1 stop14h 10m

$624

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Sat 2/28

5:40 pm-6:05 pm

1 stop18h 25m

Bilbao

Sun 3/8

6:45 am-2:35 pm

1 stop13h 50m

$636

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Sun 5/17

5:40 pm-11:40 am

1 stop12h 00m

Bilbao

Wed 6/17

12:25 pm-8:35 pm

1 stop14h 10m

$657

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Tue 5/19

10:35 pm-11:30 am

1 stop30h 55m

Bilbao

Wed 6/17

12:25 pm-8:35 pm

1 stop14h 10m

$661

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Thu 5/21

8:30 pm-7:35 pm

2 stops17h 05m

$1,931

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/26

Showing 1-10 of 11 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 December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice 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. 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 December 27, 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
1,434 reviews

Boarding

7.7

Comfort

7.6

Food

7.2

Crew

8.3

Entertainment

7.1

Overall

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
KLM
7.7
Good
1,434 reviews
KLM
7.7
Good
1,434 reviews

Boarding

7.7

Comfort

7.6

Food

7.2

Crew

8.3

Entertainment

7.1

Overall

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
United Airlines
7.4
Good
9,116 reviews
KLM
7.7
Good
1,434 reviews

Boarding

7.7

Comfort

7.6

Food

7.2

Crew

8.3

Entertainment

7.1

Overall

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
Iberia
7.0
Good
3,059 reviews
KLM
7.7
Good
1,434 reviews

Boarding

7.7

Comfort

7.6

Food

7.2

Crew

8.3

Entertainment

7.1

Overall

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
Lufthansa
6.8
Okay
7,653 reviews
KLM
7.7
Good
1,434 reviews

Boarding

7.7

Comfort

7.6

Food

7.2

Crew

8.3

Entertainment

7.1

Overall

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle

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 $459, TAP AIR PORTUGAL can have you in Bilbao from Washington, D.C. Dulles Intl Airport in 18h 25m. The distance between Washington, D.C. Dulles Intl Airport and Bilbao is about 3757 mi.

  • 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 30% 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.
Reagan-National to Bilbao flights
Baltimore to Bilbao flights
Reagan-National to San Sebastian flights
Dulles Intl to San Sebastian flights
Baltimore to San Sebastian flights

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 December 27, 2025.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest$492Average$739FlexibilityNo cancel feeOn-time76%
KLMCheapest$503Average$750FlexibilityNo cancel feeOn-time75%
IberiaCheapest$509Average$590FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$514Average$679FlexibilityNo cancel feeOn-time69%

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