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.

What is the cheapest airline that flies from Washington, D.C. Dulles Intl to Bilbao?

TAP AIR PORTUGAL is the most popular carrier operating from Washington, D.C. Dulles Intl to Bilbao

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.

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.

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 32% 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 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.

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 February 2026, 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.

$374 Cheap Flights from Washington, D.C. Dulles Intl Airport to Bilbao in 2026

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

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

6:30 pm - 5:55 pm

IAD

BIO

18h 25m

1 stop

7:20 pm - 3:35 pm

BIO

IAD

25h 15m

1 stop

$472TAP AIR PORTUGAL

Mon, Mar 9 - Mon, Mar 16

10:35 pm - 6:05 pm

IAD

BIO

13h 30m

1 stop

6:50 pm - 3:05 pm

BIO

IAD

26h 15m

1 stop

$492TAP AIR PORTUGAL

Sat, Apr 25 - Tue, May 5

10:35 pm - 6:05 pm

IAD

BIO

13h 30m

1 stop

6:50 pm - 8:35 pm

BIO

IAD

31h 45m

1 stop

$500TAP AIR PORTUGAL

Sat, Apr 25 - Tue, May 5

10:35 pm - 6:05 pm

IAD

BIO

13h 30m

1 stop

7:45 pm - 8:35 pm

BIO

IAD

30h 50m

1 stop

$520TAP AIR PORTUGAL

Sat, Apr 25 - Sun, May 3

10:35 pm - 6:00 pm

IAD

BIO

13h 25m

1 stop

12:25 pm - 3:05 pm

BIO

IAD

32h 40m

1 stop

$526TAP AIR PORTUGAL

Mon, Mar 30 - Wed, Apr 8

10:35 pm - 6:00 pm

IAD

BIO

13h 25m

1 stop

12:15 pm - 8:35 pm

BIO

IAD

14h 20m

1 stop

$532TAP AIR PORTUGAL

Mon, May 4 - Thu, May 21

10:35 pm - 11:40 am

IAD

BIO

31h 05m

1 stop

12:15 pm - 8:35 pm

BIO

IAD

14h 20m

1 stop

$537TAP AIR PORTUGAL

Mon, May 4 - Thu, May 21

5:45 pm - 11:30 am

IAD

BIO

11h 45m

1 stop

12:25 pm - 3:05 pm

BIO

IAD

32h 40m

1 stop

$539TAP AIR PORTUGAL

Wed, May 6 - Mon, Aug 31

5:45 pm - 11:30 am

IAD

BIO

11h 45m

1 stop

12:25 pm - 3:05 pm

BIO

IAD

32h 40m

1 stop

$540TAP AIR PORTUGAL

Wed, May 6 - Mon, Aug 31

5:30 pm - 4:00 pm

IAD

BIO

16h 30m

2 stops

9:05 pm - 3:35 pm

BIO

IAD

23h 30m

2 stops

$555Multiple Airlines

Mon, Mar 2 - Mon, Mar 9

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

Apr 13

IAD10:35 pmWashington, D.C. Dulles Intl

13h 25m

1 stop

BIO6:00 pmBilbao

Apr 30

BIO12:15 pmBilbao

14h 20m

1 stop

IAD8:35 pmWashington, D.C. Dulles Intl

$472

TAP AIR PORTUGAL

Apr 25

IAD10:35 pmWashington, D.C. Dulles Intl

13h 30m

1 stop

BIO6:05 pmBilbao

May 5

BIO6:50 pmBilbao

26h 15m

1 stop

IAD3:05 pmWashington, D.C. Dulles Intl

$492

TAP AIR PORTUGAL

Mar 30

IAD10:35 pmWashington, D.C. Dulles Intl

13h 25m

1 stop

BIO6:00 pmBilbao

Apr 8

BIO12:25 pmBilbao

32h 40m

1 stop

IAD3:05 pmWashington, D.C. Dulles Intl

$526

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

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

Turkish Airlines

Mar 11

IAD2:30 pmWashington, D.C. Dulles Intl

20h 40m

1 stop

BIO4:10 pmBilbao

Mar 20

BIO12:00 pmBilbao

29h 45m

1 stop

IAD12:45 pmWashington, D.C. Dulles Intl

$589

Turkish Airlines

Apr 1

IAD1:20 pmWashington, D.C. Dulles Intl

22h 00m

1 stop

BIO5:20 pmBilbao

Apr 8

BIO6:15 pmBilbao

23h 20m

1 stop

IAD11:35 amWashington, D.C. Dulles Intl

$592

Turkish Airlines

Apr 2

IAD1:20 pmWashington, D.C. Dulles Intl

15h 50m

1 stop

BIO11:10 amBilbao

Apr 9

BIO6:15 pmBilbao

23h 20m

1 stop

IAD11:35 amWashington, D.C. Dulles Intl

$595

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

Mon 3/9

6:30 pm-5:55 pm

1 stop18h 25m

Bilbao

Mon 3/16

7:20 pm-3:35 pm

1 stop25h 15m

$472

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Sat 4/25

10:35 pm-6:05 pm

1 stop13h 30m

Bilbao

Tue 5/5

6:50 pm-3:05 pm

1 stop26h 15m

$492

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Sat 4/25

10:35 pm-6:05 pm

1 stop13h 30m

Bilbao

Tue 5/5

6:50 pm-8:35 pm

1 stop31h 45m

$500

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Sat 4/25

10:35 pm-6:05 pm

1 stop13h 30m

Bilbao

Sun 5/3

7:45 pm-8:35 pm

1 stop30h 50m

$520

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Mon 3/30

10:35 pm-6:00 pm

1 stop13h 25m

Bilbao

Wed 4/8

12:25 pm-3:05 pm

1 stop32h 40m

$526

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Mon 5/4

10:35 pm-6:00 pm

1 stop13h 25m

Bilbao

Thu 5/21

12:15 pm-8:35 pm

1 stop14h 20m

$532

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Mon 5/4

10:35 pm-11:40 am

1 stop31h 05m

Bilbao

Thu 5/21

12:15 pm-8:35 pm

1 stop14h 20m

$537

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Wed 5/6

5:45 pm-11:30 am

1 stop11h 45m

Bilbao

Mon 8/31

12:25 pm-3:05 pm

1 stop32h 40m

$539

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Wed 5/6

5:45 pm-11:30 am

1 stop11h 45m

Bilbao

Mon 8/31

12:25 pm-3:05 pm

1 stop32h 40m

$540

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Mon 3/2

5:30 pm-4:00 pm

2 stops16h 30m

Bilbao

Mon 3/9

9:05 pm-3:35 pm

2 stops23h 30m

$555

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 16 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 cheapest month to fly to Bilbao?

The cheapest month to fly to Bilbao from Washington, D.C. Dulles Intl Airport is in January. Flight prices, which tend to average around $364, are often lower during this time because this is during the off-season. If you’re not able to fly to Bilbao in January, then September is your next best option. Flight prices from Washington, D.C. Dulles Intl Airport to Bilbao during September average around $520.

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 45m
Direct flights	None

The fastest flight from Washington, D.C. Dulles Intl Airport to Bilbao takes 11h 45m

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 11h 45m 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 February 2026, 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 30%, Iberia with 17%, and TAP AIR PORTUGAL with 14%.

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
TAP AIR PORTUGAL	PriceFrom $421	Free Cancellation	Rating 7.1 2,133 reviews	Search TAP AIR PORTUGAL flights
Lufthansa	PriceFrom $470	Free Cancellation	Rating 6.8 7,758 reviews	Search Lufthansa flights
United Airlines	PriceFrom $505	Free Cancellation	Rating 7.4 9,235 reviews	Search United Airlines flights
Iberia	PriceFrom $509	Free Cancellation	Rating 7.0 3,103 reviews	Search Iberia flights

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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 $374

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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

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

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

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Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Bilbao that are best for you.

See travel insights to Bilbao from

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

What is the cheapest month to fly to Bilbao?

What is the cheapest airline that flies from Washington, D.C. Dulles Intl to Bilbao?

TAP AIR PORTUGAL is the most popular carrier operating from Washington, D.C. Dulles Intl 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

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Fly your favorite airline to Bilbao

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List of cabin classes available on flights landing in Bilbao. Availability may vary depending on flight origin and airline.

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