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

TAP AIR PORTUGAL, United Airlines, and American Airlines are the most popular carriers operating from Washington, D.C. Dulles Intl to Bilbao

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.

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

Lisbon (LIS) was the most common stop: 40% 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 Paris (CDG) offer the lowest average round-trip price of $508.

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 5 different airlines that fly to Bilbao on a routine basis, so you have a few additional options to choose from.

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 August 2025, there are 5 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.

$249 Cheap Flights from Washington, D.C. Dulles Intl Airport to Bilbao (IAD-BIO) in 2025

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Find the cheapest flights from Washington, D.C. Dulles Intl Airport to Bilbao (IAD-BIO)

Round-trip

One-way

Last minute

Cheap round-trip flights

1:00 pm - 4:05 pmIAD-BIO

21h 05m2 stops

6:45 am - 9:05 pmBIO-IAD

20h 20m2 stops

$466Air Canada

Find Deal

Mon, Sep 29 - Wed, Oct 15

5:45 pm - 6:00 pmIAD-BIO

18h 15m1 stop

12:25 pm - 3:20 pmBIO-IAD

32h 55m1 stop

$469TAP AIR PORTUGAL

Find Deal

Mon, Sep 29 - Wed, Oct 15

1:00 pm - 4:05 pmIAD-BIO

21h 05m2 stops

6:45 am - 3:50 pmBIO-IAD

15h 05m1 stop

$473

Find Deal

Mon, Sep 29 - Wed, Oct 15

10:20 pm - 11:25 pmIAD-BIO

19h 05m1 stop

6:45 am - 3:50 pmBIO-IAD

15h 05m1 stop

$490Lufthansa

Find Deal

Wed, Oct 1 - Wed, Oct 22

10:20 pm - 11:25 pmIAD-BIO

19h 05m1 stop

6:45 am - 9:05 pmBIO-IAD

20h 20m2 stops

$492United Airlines

Find Deal

Wed, Oct 1 - Wed, Oct 22

8:15 am - 11:20 pmIAD-BIO

33h 05m2 stops

6:45 am - 2:35 pmBIO-IAD

13h 50m1 stop

$500United Airlines

Find Deal

Wed, Dec 24 - Fri, Jan 9

4:35 pm - 8:30 amIAD-BIO

9h 55m1 stop

9:35 pm - 3:00 pmBIO-IAD

23h 25m1 stop

$501Iberia

Find Deal

Mon, Sep 29 - Mon, Oct 6

9:20 pm - 10:00 pmIAD-BIO

18h 40m1 stop

5:20 pm - 4:20 pmBIO-IAD

29h 00m1 stop

$519KLM

Find Deal

Mon, Sep 22 - Mon, Sep 29

10:20 pm - 6:20 pmIAD-BIO

14h 00m2 stops

7:15 am - 3:50 pmBIO-IAD

14h 35m2 stops

$536Lufthansa

Find Deal

Wed, Oct 1 - Wed, Oct 22

9:20 pm - 10:00 pmIAD-BIO

18h 40m1 stop

5:15 pm - 3:35 pmBIO-IAD

28h 20m1 stop

$570KLM

Find Deal

Sun, Oct 5 - Sat, Oct 11

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

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

Air Canada

Sep 29

IAD1:00 pmWashington, D.C. Dulles Intl

21h 05m

2 stops

BIO4:05 pmBilbao

Oct 15

BIO6:45 amBilbao

20h 20m

2 stops

IAD9:05 pmWashington, D.C. Dulles Intl

$466

Find similar

Air Canada

Oct 1

IAD1:00 pmWashington, D.C. Dulles Intl

18h 25m

2 stops

BIO1:25 pmBilbao

Oct 22

BIO6:45 amBilbao

20h 20m

2 stops

IAD9:05 pmWashington, D.C. Dulles Intl

$496

Find similar

Air Canada

Oct 1

IAD3:36 pmWashington, D.C. Dulles Intl

15h 49m

2 stops

BIO1:25 pmBilbao

Oct 22

BIO6:45 amBilbao

20h 20m

2 stops

IAD9:05 pmWashington, D.C. Dulles Intl

$502

Find similar

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

Oct 1

IAD10:20 pmWashington, D.C. Dulles Intl

19h 05m

1 stop

BIO11:25 pmBilbao

Oct 22

BIO6:45 amBilbao

15h 05m

1 stop

IAD3:50 pmWashington, D.C. Dulles Intl

$490

Find similar

Lufthansa

Oct 1

IAD10:20 pmWashington, D.C. Dulles Intl

14h 00m

2 stops

BIO6:20 pmBilbao

Oct 22

BIO7:15 amBilbao

14h 35m

2 stops

IAD3:50 pmWashington, D.C. Dulles Intl

$536

Find similar

Lufthansa

Dec 25

IAD10:55 pmWashington, D.C. Dulles Intl

18h 10m

1 stop

BIO11:05 pmBilbao

Jan 8

BIO6:50 pmBilbao

31h 15m

1 stop

IAD8:05 pmWashington, D.C. Dulles Intl

$559

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

Mon 9/29

1:00 pm-4:05 pm

2 stops21h 05m

Bilbao

Wed 10/15

6:45 am-9:05 pm

2 stops20h 20m

$466

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Mon 9/29

5:45 pm-6:00 pm

1 stop18h 15m

Bilbao

Wed 10/15

12:25 pm-3:20 pm

1 stop32h 55m

$469

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Mon 9/29

1:00 pm-4:05 pm

2 stops21h 05m

Bilbao

Wed 10/15

6:45 am-3:50 pm

1 stop15h 05m

$473

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Wed 10/1

10:20 pm-11:25 pm

1 stop19h 05m

Bilbao

Wed 10/22

6:45 am-3:50 pm

1 stop15h 05m

$490

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Wed 10/1

10:20 pm-11:25 pm

1 stop19h 05m

Bilbao

Wed 10/22

6:45 am-9:05 pm

2 stops20h 20m

$492

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Wed 12/24

8:15 am-11:20 pm

2 stops33h 05m

Bilbao

Fri 1/9

6:45 am-2:35 pm

1 stop13h 50m

$500

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Mon 9/29

4:35 pm-8:30 am

1 stop9h 55m

Bilbao

Mon 10/6

9:35 pm-3:00 pm

1 stop23h 25m

$501

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Mon 9/22

9:20 pm-10:00 pm

1 stop18h 40m

Bilbao

Mon 9/29

5:20 pm-4:20 pm

1 stop29h 00m

$519

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Wed 10/1

10:20 pm-6:20 pm

2 stops14h 00m

Bilbao

Wed 10/22

7:15 am-3:50 pm

2 stops14h 35m

$536

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Sun 10/5

9:20 pm-10:00 pm

1 stop18h 40m

Bilbao

Sat 10/11

5:15 pm-3:35 pm

1 stop28h 20m

$570

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 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

Direct flights	None

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 9h 55m 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 August 2025, there are 5 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 33% of the total bookings. Other popular airlines include Lufthansa with 28%, Iberia with 17%, and TAP AIR PORTUGAL with 12%.

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 $447	Free Cancellation	Rating 7.1 1,965 reviews	Search TAP AIR PORTUGAL flights
KLM	PriceFrom $503	Free Cancellation	Rating 7.8 1,382 reviews	Search KLM flights
Iberia	PriceFrom $509	Free Cancellation	Rating 7.0 2,900 reviews	Search Iberia flights
United Airlines	PriceFrom $514	Free Cancellation	Rating 7.4 8,941 reviews	Search United Airlines flights
Lufthansa	PriceFrom $530	Free Cancellation	Rating 6.8 7,375 reviews	Search Lufthansa 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 $249

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Find the cheapest flights from Washington, D.C. Dulles Intl Airport to Bilbao (IAD-BIO)

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

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

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

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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

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 cheapest day to depart on your flight to Bilbao?

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

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

TAP AIR PORTUGAL, United Airlines, and American Airlines are the most popular carriers 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?

Lisbon (LIS) was the most common stop: 40% 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 Paris (CDG) offer the lowest average round-trip price of $508.

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

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