Which airport is the most popular layover for flights between Washington, D.C. Dulles Intl Airport and Bilbao?

Madrid (MAD) was the most common stop: 43% of momondo users choosing 1-stop flights on this route connected there.

Which layover airport has the shortest travel time from Washington, D.C. Dulles Intl Airport to Bilbao?

Flights connecting via Madrid (MAD) have the shortest average one-way travel time: 9h 55m.

Which layover airport offers the lowest fares from Washington, D.C. Dulles Intl Airport to Bilbao?

Flights via Lisbon (LIS) offer the lowest average round-trip price of $545.

What airlines fly to Bilbao?

Iberia, United Airlines and Lufthansa are the top three most popular airlines that fly to Bilbao from Washington, D.C. Dulles Intl Airport according to our data. Iberia is the first choice among our users, with 34% of people opting to fly with this airline when traveling to Bilbao. Keep in mind that there are 4 different airlines that fly to Bilbao on a routine basis, so you have a few additional options to choose from.

Which layover airport has the shortest connection time from Washington, D.C. Dulles Intl Airport to Bilbao?

Zurich (ZRH) has the shortest average layover time for this route: 1h 03m.

When did momondo last update prices for flights from Washington, D.C. Dulles Intl Airport to Bilbao Airport?

Prices for flights from Washington, D.C. Dulles Intl Airport to Bilbao Airport are refreshed on a daily basis.

How many operators does momondo search for flights from Washington, D.C. Dulles Intl Airport to Bilbao Airport?

As of December 2025, there are 4 operators available to choose from for flights from Washington, D.C. Dulles Intl Airport to Bilbao Airport.

How old do you have to be to fly from Washington, D.C. Dulles Intl Airport to Bilbao Airport?

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Washington, D.C. Dulles Intl Airport to Bilbao Airport.

What documentation or ID do you need to fly to Bilbao Airport?

The necessary travel and health documents for your Bilbao Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$259 Cheap Flights from Washington, D.C. Dulles Intl Airport to Bilbao in 2025/26

Q: What is the typical price of a round-trip flight between Washington, D.C. Dulles Intl Airport and Bilbao?

Prices are currently low for flights on this route. Typical prices usually range from $660 to $878. The lowest price recently found on this route was $436.

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Find the cheapest flights from Washington, D.C. Dulles Intl Airport to Bilbao

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One-way

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Enter your travel dates to find the best prices.

5:40 pm - 10:50 am

IAD

BIO

11h 10m1 stop

11:35 am - 3:35 pm

BIO

IAD

34h 00m1 stop

$436Lufthansa

Wed, Jan 21 - Wed, Jan 28

6:05 pm - 6:05 pm

IAD

BIO

18h 00m2 stops

11:35 am - 3:35 pm

BIO

IAD

34h 00m1 stop

$439Lufthansa

Wed, Jan 21 - Wed, Jan 28

5:30 pm - 11:25 am

IAD

BIO

11h 55m1 stop

6:40 pm - 9:00 pm

BIO

IAD

32h 20m1 stop

$450TAP AIR PORTUGAL

Tue, Jan 20 - Tue, Jan 27

5:30 pm - 5:55 pm

IAD

BIO

18h 25m1 stop

6:40 pm - 4:15 pm

BIO

IAD

26h 35m1 stop

$463TAP AIR PORTUGAL

Mon, Mar 2 - Sun, Mar 15

9:45 am - 12:50 pm

IAD

BIO

21h 05m2 stops

5:40 pm - 3:50 pm

BIO

IAD

28h 10m1 stop

$469Multiple Airlines

Mon, Feb 2 - Tue, Feb 10

6:50 pm - 5:20 pm

IAD

BIO

16h 30m1 stop

6:50 am - 4:05 pm

BIO

IAD

15h 15m1 stop

$470Multiple Airlines

Mon, Feb 2 - Tue, Feb 10

7:49 pm - 5:20 pm

IAD

BIO

15h 31m2 stops

6:50 am - 4:05 pm

BIO

IAD

15h 15m1 stop

$475KLM

Tue, Jan 20 - Tue, Jan 27

7:49 pm - 5:20 pm

IAD

BIO

15h 31m2 stops

6:50 am - 4:46 pm

BIO

IAD

15h 56m2 stops

$485KLM

Tue, Jan 20 - Tue, Jan 27

1:05 pm - 6:05 pm

IAD

BIO

23h 00m2 stops

11:35 am - 11:18 pm

BIO

IAD

17h 43m2 stops

$488United Airlines

Wed, Jan 21 - Wed, Jan 28

10:20 pm - 11:25 pm

IAD

BIO

19h 05m1 stop

6:45 am - 3:15 pm

BIO

IAD

14h 30m1 stop

$508Lufthansa

Mon, May 4 - Thu, May 21

Lufthansa flights from Washington, D.C. Dulles Intl Airport to Bilbao

Our best Lufthansa deals on Washington, D.C. Dulles Intl Airport to Bilbao flight tickets

Lufthansa

Jan 21

IAD5:40 pmWashington, D.C. Dulles Intl

11h 10m

1 stop

BIO10:50 amBilbao

Jan 28

BIO11:35 amBilbao

34h 00m

1 stop

IAD3:35 pmWashington, D.C. Dulles Intl

$436

Find similar

Lufthansa

Jan 21

IAD6:05 pmWashington, D.C. Dulles Intl

18h 00m

2 stops

BIO6:05 pmBilbao

Jan 28

BIO11:35 amBilbao

34h 00m

1 stop

IAD3:35 pmWashington, D.C. Dulles Intl

$439

Find similar

Lufthansa

May 4

IAD10:20 pmWashington, D.C. Dulles Intl

19h 05m

1 stop

BIO11:25 pmBilbao

May 21

BIO6:45 amBilbao

14h 30m

1 stop

IAD3:15 pmWashington, D.C. Dulles Intl

$508

Find similar

TAP AIR PORTUGAL flights from Washington, D.C. Dulles Intl Airport to Bilbao

Our best TAP AIR PORTUGAL deals on Washington, D.C. Dulles Intl Airport to Bilbao flight tickets

TAP AIR PORTUGAL

Jan 20

IAD5:30 pmWashington, D.C. Dulles Intl

11h 55m

1 stop

BIO11:25 amBilbao

Jan 27

BIO6:40 pmBilbao

32h 20m

1 stop

IAD9:00 pmWashington, D.C. Dulles Intl

$450

Find similar

TAP AIR PORTUGAL

Mar 2

IAD5:30 pmWashington, D.C. Dulles Intl

18h 25m

1 stop

BIO5:55 pmBilbao

Mar 15

BIO6:40 pmBilbao

26h 35m

1 stop

IAD4:15 pmWashington, D.C. Dulles Intl

$463

Find similar

TAP AIR PORTUGAL

Jan 8

IAD5:30 pmWashington, D.C. Dulles Intl

18h 25m

1 stop

BIO5:55 pmBilbao

Jan 11

BIO6:40 pmBilbao

26h 35m

1 stop

IAD3:15 pmWashington, D.C. Dulles Intl

$583

Find similar

momondo Fare Finder

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

Fly to

Route

Depart

Return

Price

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Wed 1/21

5:40 pm-10:50 am

1 stop11h 10m

Bilbao

Wed 1/28

11:35 am-3:35 pm

1 stop34h 00m

$436

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Wed 1/21

6:05 pm-6:05 pm

2 stops18h 00m

Bilbao

Wed 1/28

11:35 am-3:35 pm

1 stop34h 00m

$439

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Tue 1/20

5:30 pm-11:25 am

1 stop11h 55m

Bilbao

Tue 1/27

6:40 pm-9:00 pm

1 stop32h 20m

$450

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Mon 3/2

5:30 pm-5:55 pm

1 stop18h 25m

Bilbao

Sun 3/15

6:40 pm-4:15 pm

1 stop26h 35m

$463

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Mon 2/2

9:45 am-12:50 pm

2 stops21h 05m

Bilbao

Tue 2/10

5:40 pm-3:50 pm

1 stop28h 10m

$469

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Mon 2/2

6:50 pm-5:20 pm

1 stop16h 30m

Bilbao

Tue 2/10

6:50 am-4:05 pm

1 stop15h 15m

$470

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Tue 1/20

7:49 pm-5:20 pm

2 stops15h 31m

Bilbao

Tue 1/27

6:50 am-4:05 pm

1 stop15h 15m

$475

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Tue 1/20

7:49 pm-5:20 pm

2 stops15h 31m

Bilbao

Tue 1/27

6:50 am-4:46 pm

2 stops15h 56m

$485

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Wed 1/21

1:05 pm-6:05 pm

2 stops23h 00m

Bilbao

Wed 1/28

11:35 am-11:18 pm

2 stops17h 43m

$488

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-3:15 pm

1 stop14h 30m

$508

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Washington, D.C. Dulles Intl Airport to Bilbao

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Layovers

What is the typical price of a round-trip flight between Washington, D.C. Dulles Intl Airport and Bilbao?

What is the cheapest day to depart on your flight to Bilbao?

The cheapest day to depart from Washington, D.C. Dulles Intl Airport to Bilbao is on a Monday. Travelers who choose to depart for Bilbao on a Monday will often find tickets for as low as $602. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $1,050. These prices are subject to change though, so be sure to set up a Price Alert for flights to Bilbao.

What is the cheapest time of day to depart on your flight to Bilbao?

Our most recent data shows that the best time of day to fly to Bilbao is in the evening. Flights from Washington, D.C. Dulles Intl Airport to Bilbao during this time can be as low as $764. At noon is when there is more demand to fly to Bilbao, so prices are often more expensive at around $890 per ticket.

When to book flights from Washington, D.C. Dulles Intl Airport to Bilbao

Are you open to changing your travel dates? Check out the ideal times to fly from Washington, D.C. Dulles Intl Airport to Bilbao according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Washington, D.C. Dulles Intl Airport to Bilbao (IAD to BIO) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Washington, D.C. Dulles Intl Airport to Bilbao

Fastest flight time	11h 10m
Direct flights	None

The fastest flight from Washington, D.C. Dulles Intl Airport to Bilbao takes 11h 10m

There are no direct flights from Washington, D.C. Dulles Intl Airport to Bilbao. There are no popular flight routes from Washington, D.C. Dulles Intl Airport to Bilbao.

Search flight deals

How far is Washington, D.C. Dulles Intl to Bilbao by plane?
There are 3756.5 mi between Washington, D.C. Dulles Intl and Bilbao. Typically, this will take 10h 40m by plane in normal conditions.
When did momondo last update prices for flights from Washington, D.C. Dulles Intl Airport to Bilbao Airport?
Prices for flights from Washington, D.C. Dulles Intl Airport to Bilbao Airport are refreshed on a daily basis.
How many operators does momondo search for flights from Washington, D.C. Dulles Intl Airport to Bilbao Airport?
As of December 2025, there are 4 operators available to choose from for flights from Washington, D.C. Dulles Intl Airport to Bilbao Airport.
How old do you have to be to fly from Washington, D.C. Dulles Intl Airport to Bilbao Airport?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Washington, D.C. Dulles Intl Airport to Bilbao Airport.
What documentation or ID do you need to fly to Bilbao Airport?
The necessary travel and health documents for your Bilbao Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from Washington, D.C. Dulles Intl Airport to Bilbao?
Based on momondo bookings for flights between Washington, D.C. Dulles Intl Airport and Bilbao, the leading airline is United Airlines, making up 38% of the total bookings. Other popular airlines include Lufthansa with 33%, Iberia with 18%, and KLM with 11%.

Best airlines flying from Washington, D.C. Dulles Intl Airport to Bilbao

Compare and see reviews for airlines that fly from Washington, D.C. Dulles Intl Airport to Bilbao with momondo

Airline	Rating	Free Cancellation	Price
Lufthansa	PriceFrom $492	Free Cancellation	Rating 6.8 7,616 reviews	Search Lufthansa flights
KLM	PriceFrom $503	Free Cancellation	Rating 7.7 1,431 reviews	Search KLM flights
Iberia	PriceFrom $509	Free Cancellation	Rating 7.0 3,042 reviews	Search Iberia flights
United Airlines	PriceFrom $514	Free Cancellation	Rating 7.4 9,078 reviews	Search United Airlines flights

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Why use momondo?

Why should I use momondo to find a flight deal from Washington, D.C. to Bilbao?

Finding the right flight to Bilbao from Washington, D.C. is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Bilbao quick and easy, saving you time and money.

Can I find flights from Washington, D.C. to Bilbao with flexible booking policies on momondo?

Flights from Washington, D.C. to Bilbao with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Washington, D.C. to Bilbao?

momondo helps you find the best flight between Washington, D.C. and Bilbao by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Washington, D.C. to Bilbao right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Bilbao, momondo offers a useful price alert feature which will track prices for flights to Bilbao from Washington, D.C. and alert you when they change.

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Cheap flights from Washington, D.C. Dulles Intl Airport to Bilbao from $259

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Find the cheapest flights from Washington, D.C. Dulles Intl Airport to Bilbao

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Lufthansa flights from Washington, D.C. Dulles Intl Airport to Bilbao

Our best Lufthansa deals on Washington, D.C. Dulles Intl Airport to Bilbao flight tickets

TAP AIR PORTUGAL flights from Washington, D.C. Dulles Intl Airport to Bilbao

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See travel insights to Bilbao from

How to get the cheapest flight ticket from Washington, D.C. Dulles Intl Airport to Bilbao

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between Washington, D.C. Dulles Intl Airport and Bilbao?

What is the cheapest day to depart on your flight to Bilbao?

What is the cheapest time of day to depart on your flight to Bilbao?

What airlines fly to Bilbao?

Which airport is the most popular layover for flights between Washington, D.C. Dulles Intl Airport and Bilbao?

Madrid (MAD) was the most common stop: 43% of momondo users choosing 1-stop flights on this route connected there.

Which layover airport offers the lowest fares from Washington, D.C. Dulles Intl Airport to Bilbao?

Flights via Lisbon (LIS) offer the lowest average round-trip price of $545.

Which layover airport has the shortest travel time from Washington, D.C. Dulles Intl Airport to Bilbao?

Flights connecting via Madrid (MAD) have the shortest average one-way travel time: 9h 55m.

Which layover airport has the shortest connection time from Washington, D.C. Dulles Intl Airport to Bilbao?

Zurich (ZRH) has the shortest average layover time for this route: 1h 03m.

When to book flights from Washington, D.C. Dulles Intl Airport to Bilbao

Cheap Washington, D.C. Dulles Intl Airport to Bilbao (IAD to BIO) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Washington, D.C. Dulles Intl Airport to Bilbao

Fastest flight time

Direct flights

How far is Washington, D.C. Dulles Intl to Bilbao by plane?

When did momondo last update prices for flights from Washington, D.C. Dulles Intl Airport to Bilbao Airport?

How many operators does momondo search for flights from Washington, D.C. Dulles Intl Airport to Bilbao Airport?

How old do you have to be to fly from Washington, D.C. Dulles Intl Airport to Bilbao Airport?

What documentation or ID do you need to fly to Bilbao Airport?

What is the most popular airline from Washington, D.C. Dulles Intl Airport to Bilbao?

Best airlines flying from Washington, D.C. Dulles Intl Airport to Bilbao

Compare and see reviews for airlines that fly from Washington, D.C. Dulles Intl Airport to Bilbao with momondo

Traveling to a place near Bilbao?

Why use momondo?

Why should I use momondo to find a flight deal from Washington, D.C. to Bilbao?

Can I find flights from Washington, D.C. to Bilbao with flexible booking policies on momondo?

How can momondo help me find flights from Washington, D.C. to Bilbao?

I’m not ready to book a flight from Washington, D.C. to Bilbao right now. Can momondo alert me if prices change?

An easier way to manage your Bilbao trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Spain

Airports servicing Basque Country