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$583+ 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 5/16. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — BIO
May 3 — May 101
Sat 5/3
Sat 5/10
1 adult, Economy
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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 April 28, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$600
(FlightHub)

One-way from

$583
(KLM)

Popular in

December

Cheapest in

March

Average price

$598
Provider with most accurate pricing for Washington, D.C. Dulles Intl-Bilbao flight deals.
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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
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One-way flight from Washington, D.C. Dulles Intl to Bilbao
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Highest demand for flights based on searches. 21% potential increase in price ($227 potential increase over avg. RT price).
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Cheapest flight prices on average. 6% potential price decrease ($53 potential savings vs. average RT price).
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Average for round-trip flights in April 2025
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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 April 28, 2025.

This FlightHub deal was found by Cheapflights users on 4/28. 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.
Sun 10/510:20 pmIAD - BIO
1 stop13h 30mLufthansa
Sat 10/116:35 pmBIO - IAD
1 stop30h 50mLufthansa
Deal found 4/28$600
This FlightHub deal was found by Cheapflights users on 4/28. 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.
Sun 10/59:45 amIAD - BIO
2 stops24h 20mMultiple Airlines
Sat 10/116:35 pmBIO - IAD
1 stop30h 50mMultiple Airlines
Deal found 4/28$606
This Cheapflightsfares deal was found by Cheapflights users on 4/28. 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.
Thu 9/44:35 pmIAD - BIO
1 stop14h 10mIberia
Sun 9/149:15 amBIO - IAD
1 stop11h 45mIberia
Deal found 4/28$647
This United Airlines deal was found by Cheapflights users on 4/28. 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 7/295:25 pmIAD - BIO
1 stop11h 20mUnited Airlines
Thu 8/146:45 amBIO - IAD
1 stop15h 05mUnited Airlines
Deal found 4/28$656
This Austrian Airlines deal was found by Cheapflights users on 4/28. 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 Austrian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/55:25 pmIAD - BIO
2 stops19h 00mAustrian Airlines
Sat 10/112:10 pmBIO - IAD
2 stops30h 25mAustrian Airlines
Deal found 4/28$658
This SWISS deal was found by Cheapflights users on 4/28. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/288:45 pmIAD - BIO
1 stop17h 30mSWISS
Tue 8/129:00 pmBIO - IAD
1 stop25h 15mSWISS
Deal found 4/28$665
This Delta deal was found by Cheapflights users on 4/28. 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.
Sun 7/276:30 pmIAD - BIO
1 stop10h 50mDelta
Thu 8/146:50 amBIO - IAD
1 stop14h 45mDelta
Deal found 4/28$669
This KLM deal was found by Cheapflights users on 4/28. 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.
Thu 5/155:25 pmIAD - BIO
1 stop17h 05mKLM
Tue 5/205:15 pmBIO - IAD
1 stop28h 20mKLM
Deal found 4/28$675
This oojo deal was found by Cheapflights users on 4/28. 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.
Fri 8/155:00 pmIAD - BIO
1 stop18h 35mTAP AIR PORTUGAL
Sun 8/247:45 pmBIO - IAD
1 stop25h 35mTAP AIR PORTUGAL
Deal found 4/28$718
This Air Canada deal was found by Cheapflights users on 4/28. 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.
Sun 8/105:31 pmIAD - BIO
2 stops18h 19mAir Canada
Tue 8/196:45 amBIO - IAD
2 stops36h 57mAir Canada
Deal found 4/28$799
This Brussels Airlines deal was found by Cheapflights users on 4/28. 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 Brussels Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/285:35 pmIAD - BIO
1 stop16h 30mBrussels Airlines
Fri 8/84:55 pmBIO - IAD
1 stop26h 35mBrussels Airlines
Deal found 4/28$863
This KAYAK deal was found by Cheapflights users on 4/28. 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.
Thu 7/3110:05 pmIAD - BIO
1 stop15h 45mScandinavian Airlines
Wed 8/137:10 amBIO - IAD
2 stops42h 49mScandinavian Airlines
Deal found 4/28$1,113

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 April 28, 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

Sun 10/5

10:20 pm-5:50 pm

1 stop13h 30m

Bilbao

Sat 10/11

6:35 pm-7:25 pm

1 stop30h 50m

$600

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Sun 10/5

9:45 am-4:05 pm

2 stops24h 20m

Bilbao

Sat 10/11

6:35 pm-7:25 pm

1 stop30h 50m

$606

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Thu 9/4

4:35 pm-12:45 pm

1 stop14h 10m

Bilbao

Sun 9/14

9:15 am-3:00 pm

1 stop11h 45m

$647

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Tue 7/29

5:25 pm-10:45 am

1 stop11h 20m

Bilbao

Thu 8/14

6:45 am-3:50 pm

1 stop15h 05m

$656

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Sun 10/5

5:25 pm-6:25 pm

2 stops19h 00m

Bilbao

Sat 10/11

2:10 pm-2:35 pm

2 stops30h 25m

$658

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Mon 7/28

8:45 pm-8:15 pm

1 stop17h 30m

Bilbao

Tue 8/12

9:00 pm-4:15 pm

1 stop25h 15m

$665

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Sun 7/27

6:30 pm-11:20 am

1 stop10h 50m

Bilbao

Thu 8/14

6:50 am-3:35 pm

1 stop14h 45m

$669

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Thu 5/15

5:25 pm-4:30 pm

1 stop17h 05m

Bilbao

Tue 5/20

5:15 pm-3:35 pm

1 stop28h 20m

$675

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Fri 8/15

5:00 pm-5:35 pm

1 stop18h 35m

Bilbao

Sun 8/24

7:45 pm-3:20 pm

1 stop25h 35m

$718

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Sun 8/10

5:31 pm-5:50 pm

2 stops18h 19m

Bilbao

Tue 8/19

6:45 am-1:42 pm

2 stops36h 57m

$799

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/28

Showing 1-10 of 19 results
1
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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 April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*2 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 AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on Washington, D.C. Dulles Intl Airport-Bilbao flight deals on Cheapflights vs. AranGrant >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 AranGrant the most. AranGrant 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

What is the cheapest time of day to fly from IAD to BIO?

Find hourly flight availability from Dulles Intl to Bilbao. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 28, 2025.

It’s typically best to fly out from Washington, D.C. Dulles Intl Airport to Bilbao in the morning. Doing so could potentially save you 1% on the flight price compared to flying at noon, which is usually more expensive.

Rainfall in Bilbao by month

Plan your trip to Bilbao by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Bilbao ranges from 2.4 - 5.6 inches per month. November is typically the wettest month, when rainfall can reach 5.6 in. July is typically the driest time to visit Bilbao when rainfall is around 2.4 in.

Temperature in Bilbao by month

Plan your trip to Bilbao by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Bilbao, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 68.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 48.2 F).

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 April 28, 2025.
Peruse reviews from past customers who have flown with Delta, KLM and Austrian Airlines from Washington, D.C. to Bilbao to help guide your decision. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,929 reviews

Crew

8.5

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,929 reviews
Delta
8.0
Very good
7,929 reviews

Crew

8.5

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
KLM
7.8
Good
1,333 reviews
Delta
8.0
Very good
7,929 reviews

Crew

8.5

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Austrian Airlines
7.6
Good
780 reviews
Delta
8.0
Very good
7,929 reviews

Crew

8.5

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
SWISS
7.5
Good
1,587 reviews
Delta
8.0
Very good
7,929 reviews

Crew

8.5

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
United Airlines
7.4
Good
8,696 reviews
Delta
8.0
Very good
7,929 reviews

Crew

8.5

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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.

  • 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 $600 on this airline. Additional options worth looking into are Iberia and United Airlines, starting at $647 and $656 round-trip. These flights start at 26% lower than the current average price 3 months from now.

  • What are the cheapest airlines to fly from Washington, D.C. Dulles Intl Airport to Bilbao one-way?

    The cheapest airline one-way is KLM, with whom users have recently found tickets for as low as $583. However, be on the lookout for offers from TAP AIR PORTUGAL and Air Canada, as they are both options that can get you from Washington, D.C. Dulles Intl Airport to Bilbao for a low price.

  • 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.

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

    Currently, January is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Bilbao (average of $541). Flying from Washington, D.C. Dulles Intl Airport to Bilbao in June is currently the most expensive (average of $1,178). 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

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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
Dulles Intl to San Sebastian flights
Reagan-National to San Sebastian flights
Baltimore to San Sebastian flights

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 April 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
IberiaCheapest$431Average$872FlexibilityNo cancel feeOn-time77%
TAP AIR PORTUGALCheapest$471Average$834FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$507Average$700FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$605Average$760FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$624Average$820FlexibilityNo cancel feeOn-time76%

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