What airlines fly to Bilbao?

United Airlines, TAP AIR PORTUGAL and Lufthansa are the top three most popular airlines that fly to Bilbao from Washington, D.C. Dulles Intl Airport according to our data. United Airlines is the first choice among our users, with 40% of people opting to fly with this airline when traveling to Bilbao. Keep in mind that there are 3 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 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.

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: 40% of momondo users choosing 1-stop flights on this route connected there.

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.

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

Aer Lingus, British Airways, and TAP AIR PORTUGAL are the most popular carriers operating from Washington, D.C. Dulles Intl to Bilbao

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 May 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.

$391 Cheap Flights from Washington, D.C. Dulles Intl Airport to Bilbao in 2026

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 $1,225 to $673. The lowest price recently found on this route was $705.

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

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

1:20 pm - 11:10 am

IAD

BIO

15h 50m

1 stop

6:20 pm - 11:35 am

BIO

IAD

23h 15m

1 stop

$705Turkish Airlines

Thu, Oct 8 - Wed, Oct 14

9:45 pm - 11:10 am

IAD

BIO

31h 25m

1 stop

12:10 pm - 11:35 am

BIO

IAD

29h 25m

1 stop

$716Turkish Airlines

Wed, Sep 9 - Fri, Sep 18

10:35 pm - 6:00 pm

IAD

BIO

13h 25m

1 stop

12:25 pm - 3:10 pm

BIO

IAD

32h 45m

1 stop

$717TAP AIR PORTUGAL

Mon, Sep 7 - Mon, Sep 14

10:35 pm - 6:00 pm

IAD

BIO

13h 25m

1 stop

7:45 pm - 3:10 pm

BIO

IAD

25h 25m

1 stop

$718TAP AIR PORTUGAL

Mon, Sep 7 - Sun, Sep 13

1:20 pm - 11:10 am

IAD

BIO

15h 50m

1 stop

12:10 pm - 11:35 am

BIO

IAD

29h 25m

1 stop

$720Turkish Airlines

Sun, Sep 6 - Tue, Sep 15

10:35 pm - 11:30 am

IAD

BIO

30h 55m

1 stop

7:45 pm - 3:10 pm

BIO

IAD

25h 25m

1 stop

$722TAP AIR PORTUGAL

Tue, Sep 8 - Sun, Sep 13

10:35 pm - 11:30 am

IAD

BIO

30h 55m

1 stop

6:50 pm - 3:10 pm

BIO

IAD

26h 20m

1 stop

$732TAP AIR PORTUGAL

Tue, Sep 8 - Tue, Sep 15

9:45 pm - 11:10 am

IAD

BIO

31h 25m

1 stop

6:20 pm - 11:35 am

BIO

IAD

23h 15m

1 stop

$733Turkish Airlines

Wed, Sep 9 - Wed, Sep 16

10:35 pm - 11:30 am

IAD

BIO

30h 55m

1 stop

12:25 pm - 8:35 pm

BIO

IAD

14h 10m

1 stop

$737TAP AIR PORTUGAL

Tue, Sep 8 - Wed, Sep 16

1:20 pm - 11:10 am

IAD

BIO

15h 50m

1 stop

12:10 pm - 7:50 pm

BIO

IAD

37h 40m

1 stop

$741Turkish Airlines

Fri, Oct 9 - Tue, Oct 13

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

Oct 8

IAD1:20 pmWashington, D.C. Dulles Intl

15h 50m

1 stop

BIO11:10 amBilbao

Oct 14

BIO6:20 pmBilbao

23h 15m

1 stop

IAD11:35 amWashington, D.C. Dulles Intl

$705

Turkish Airlines

Sep 9

IAD9:45 pmWashington, D.C. Dulles Intl

31h 25m

1 stop

BIO11:10 amBilbao

Sep 18

BIO12:10 pmBilbao

29h 25m

1 stop

IAD11:35 amWashington, D.C. Dulles Intl

$716

Turkish Airlines

Sep 6

IAD1:20 pmWashington, D.C. Dulles Intl

15h 50m

1 stop

BIO11:10 amBilbao

Sep 15

BIO12:10 pmBilbao

29h 25m

1 stop

IAD11:35 amWashington, D.C. Dulles Intl

$720

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

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

Iberia

Sep 7

IAD5:45 pmWashington, D.C. Dulles Intl

15h 10m

2 stops

BIO2:55 pmBilbao

Sep 14

BIO9:35 pmBilbao

23h 55m

1 stop

IAD3:30 pmWashington, D.C. Dulles Intl

$777

Iberia

Aug 4

IAD8:25 pmWashington, D.C. Dulles Intl

14h 30m

1 stop

BIO4:55 pmBilbao

Aug 19

BIO9:35 pmBilbao

27h 20m

1 stop

IAD6:55 pmWashington, D.C. Dulles Intl

$778

Iberia

May 16

IAD5:00 pmWashington, D.C. Dulles Intl

24h 15m

1 stop

BIO11:15 pmBilbao

May 22

BIO9:50 pmBilbao

23h 40m

1 stop

IAD3:30 pmWashington, D.C. Dulles Intl

$1,168

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

Cheapest round-trip

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Thu 10/8

1:20 pm-11:10 am

1 stop15h 50m

Bilbao

Wed 10/14

6:20 pm-11:35 am

1 stop23h 15m

$705

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Wed 9/9

9:45 pm-11:10 am

1 stop31h 25m

Bilbao

Fri 9/18

12:10 pm-11:35 am

1 stop29h 25m

$716

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Mon 9/7

10:35 pm-6:00 pm

1 stop13h 25m

Bilbao

Mon 9/14

12:25 pm-3:10 pm

1 stop32h 45m

$717

Quickest round-trip

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Mon 9/7

10:35 pm-6:00 pm

1 stop13h 25m

Bilbao

Sun 9/13

7:45 pm-3:10 pm

1 stop25h 25m

$718

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Sun 9/6

1:20 pm-11:10 am

1 stop15h 50m

Bilbao

Tue 9/15

12:10 pm-11:35 am

1 stop29h 25m

$720

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Tue 9/8

10:35 pm-11:30 am

1 stop30h 55m

Bilbao

Sun 9/13

7:45 pm-3:10 pm

1 stop25h 25m

$722

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Tue 9/8

10:35 pm-11:30 am

1 stop30h 55m

Bilbao

Tue 9/15

6:50 pm-3:10 pm

1 stop26h 20m

$732

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Wed 9/9

9:45 pm-11:10 am

1 stop31h 25m

Bilbao

Wed 9/16

6:20 pm-11:35 am

1 stop23h 15m

$733

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Tue 9/8

10:35 pm-11:30 am

1 stop30h 55m

Bilbao

Wed 9/16

12:25 pm-8:35 pm

1 stop14h 10m

$737

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Fri 10/9

1:20 pm-11:10 am

1 stop15h 50m

Bilbao

Tue 10/13

12:10 pm-7:50 pm

1 stop37h 40m

$741

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 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	13h 25m
Direct flights	None

The fastest flight from Washington, D.C. Dulles Intl Airport to Bilbao takes 13h 25m

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

Frequently asked questions about flying from Washington, D.C. Dulles Intl Airport to Bilbao

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 13h 25m 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 May 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 Lufthansa, making up 34% of the total bookings. Other popular airlines include United Airlines with 30%, TAP AIR PORTUGAL with 25%, and Iberia 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
TAP AIR PORTUGAL	PriceFrom $447	Free Cancellation	Rating 7.2 2,249 reviews	Search TAP AIR PORTUGAL flights
Lufthansa	PriceFrom $470	Free Cancellation	Rating 6.8 7,985 reviews	Search Lufthansa flights
United Airlines	PriceFrom $514	Free Cancellation	Rating 7.4 9,695 reviews	Search United Airlines flights
Iberia	PriceFrom $515	Free Cancellation	Rating 7.0 3,213 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 $391

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

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

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

What airlines fly to Bilbao?

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

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

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

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

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

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Frequently asked questions about flying 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

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