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

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

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

Lisbon (LIS) was the most common stop: 35% of momondo users choosing 1-stop flights on this route connected there.

How long does it take to fly to Bilbao?

Flight times from Washington, D.C. to Bilbao vary, but if you’re flying out of Washington, D.C. and flying into Bilbao (one of the most popular routes), then the duration is 12h 58m on average. Another popular route from Washington, D.C. to Bilbao is flying from Baltimore to Bilbao, which will take roughly 15h 38m. Keep in mind that layovers or delays could extend your travel time.

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

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

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

Prices for flights from Washington, D.C. to Bilbao Airport refresh daily.

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

There are 5 operators available for flights from Washington, D.C. to Bilbao Airport as of November 2025.

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

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

The travel and health documents you'll need for your trip to Bilbao Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Bilbao Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$344 Cheap Flights from Washington, D.C. to Bilbao in 2025/26

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10:55 pm - 6:05 pmIAD-BIO

13h 10m1 stop

12:50 pm - 8:15 pmBIO-IAD

13h 25m1 stop

$470United Airlines

Find Deal

Wed, Jan 7 - Thu, Feb 5

5:20 pm - 6:05 pmIAD-BIO

18h 45m2 stops

12:50 pm - 8:15 pmBIO-IAD

13h 25m1 stop

$474United Airlines

Find Deal

Wed, Jan 7 - Thu, Feb 5

6:50 pm - 5:20 pmIAD-BIO

16h 30m1 stop

7:25 am - 4:35 pmBIO-IAD

15h 10m1 stop

$476Delta

Find Deal

Mon, Jan 12 - Wed, Jan 21

7:49 pm - 5:20 pmIAD-BIO

39h 31m2 stops

6:50 am - 4:05 pmBIO-IAD

15h 15m1 stop

$480Delta

Find Deal

Sat, Jan 17 - Thu, Jan 29

5:30 pm - 5:55 pmIAD-BIO

18h 25m1 stop

6:40 pm - 3:15 pmBIO-IAD

26h 35m1 stop

$507TAP AIR PORTUGAL

Find Deal

Thu, Jan 8 - Sun, Feb 8

10:55 pm - 11:20 pmIAD-BIO

18h 25m1 stop

7:25 am - 8:05 pmBIO-IAD

18h 40m1 stop

$513Lufthansa

Find Deal

Fri, Nov 14 - Wed, Nov 19

5:20 pm - 6:05 pmIAD-BIO

18h 45m2 stops

6:50 pm - 3:50 pmBIO-IAD

27h 00m2 stops

$514Lufthansa

Find Deal

Wed, Jan 7 - Mon, Feb 9

6:20 pm - 8:30 amIAD-BIO

32h 10m2 stops

9:35 pm - 3:35 pmBIO-IAD

48h 00m2 stops

$562Iberia

Find Deal

Fri, Jan 9 - Sun, Jan 18

3:59 pm - 8:50 pmDCA-BIO

22h 51m2 stops

9:15 am - 6:56 pmBIO-DCA

15h 41m2 stops

$783Iberia

Find Deal

Sat, Jan 10 - Tue, Feb 10

12:30 pm - 11:25 amDCA-BIO

16h 55m2 stops

6:40 pm - 7:52 pmBIO-DCA

31h 12m2 stops

$919TAP AIR PORTUGAL

Find Deal

Wed, Dec 10 - Tue, Dec 16

United Airlines flights from Washington, D.C. to Bilbao

Our best United Airlines deals on Washington, D.C. to Bilbao flight tickets

United Airlines

Jan 7

IAD10:55 pmWashington, D.C. Dulles Intl

13h 10m

1 stop

BIO6:05 pmBilbao

Feb 5

BIO12:50 pmBilbao

13h 25m

1 stop

IAD8:15 pmWashington, D.C. Dulles Intl

$470

Find similar

United Airlines

Jan 7

IAD5:20 pmWashington, D.C. Dulles Intl

18h 45m

2 stops

BIO6:05 pmBilbao

Feb 5

BIO12:50 pmBilbao

13h 25m

1 stop

IAD8:15 pmWashington, D.C. Dulles Intl

$474

Find similar

United Airlines

Dec 31

IAD5:40 pmWashington, D.C. Dulles Intl

18h 25m

1 stop

BIO6:05 pmBilbao

Jan 9

BIO6:45 amBilbao

20h 14m

2 stops

IAD8:59 pmWashington, D.C. Dulles Intl

$481

Find similar

Delta flights from Washington, D.C. to Bilbao

Our best Delta deals on Washington, D.C. to Bilbao flight tickets

Delta

Jan 12

IAD6:50 pmWashington, D.C. Dulles Intl

16h 30m

1 stop

BIO5:20 pmBilbao

Jan 21

BIO7:25 amBilbao

15h 10m

1 stop

IAD4:35 pmWashington, D.C. Dulles Intl

$476

Find similar

Delta

Jan 17

IAD7:49 pmWashington, D.C. Dulles Intl

39h 31m

2 stops

BIO5:20 pmBilbao

Jan 29

BIO6:50 amBilbao

15h 15m

1 stop

IAD4:05 pmWashington, D.C. Dulles Intl

$480

Find similar

Delta

Jan 7

BWI3:38 pmBaltimore/Washington

18h 52m

2 stops

BIO4:30 pmBilbao

Feb 10

BIO6:50 amBilbao

16h 58m

2 stops

BWI5:48 pmBaltimore/Washington

$491

Find similar

Fly from

Fly to

Route

Depart

Return

Price

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Wed 1/7

10:55 pm-6:05 pm

1 stop13h 10m

Bilbao

Thu 2/5

12:50 pm-8:15 pm

1 stop13h 25m

$470

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Wed 1/7

5:20 pm-6:05 pm

2 stops18h 45m

Bilbao

Thu 2/5

12:50 pm-8:15 pm

1 stop13h 25m

$474

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Mon 1/12

6:50 pm-5:20 pm

1 stop16h 30m

Bilbao

Wed 1/21

7:25 am-4:35 pm

1 stop15h 10m

$476

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Sat 1/17

7:49 pm-5:20 pm

2 stops39h 31m

Bilbao

Thu 1/29

6:50 am-4:05 pm

1 stop15h 15m

$480

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Thu 1/8

5:30 pm-5:55 pm

1 stop18h 25m

Bilbao

Sun 2/8

6:40 pm-3:15 pm

1 stop26h 35m

$507

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Fri 11/14

10:55 pm-11:20 pm

1 stop18h 25m

Bilbao

Wed 11/19

7:25 am-8:05 pm

1 stop18h 40m

$513

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Wed 1/7

5:20 pm-6:05 pm

2 stops18h 45m

Bilbao

Mon 2/9

6:50 pm-3:50 pm

2 stops27h 00m

$514

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Fri 1/9

6:20 pm-8:30 am

2 stops32h 10m

Bilbao

Sun 1/18

9:35 pm-3:35 pm

2 stops48h 00m

$562

Washington, D.C.Bilbao

DCA - BIO

DCABIO

Washington, D.C. Reagan-National

Sat 1/10

3:59 pm-8:50 pm

2 stops22h 51m

Bilbao

Tue 2/10

9:15 am-6:56 pm

2 stops15h 41m

$783

Washington, D.C.Bilbao

DCA - BIO

DCABIO

Washington, D.C. Reagan-National

Wed 12/10

12:30 pm-11:25 am

2 stops16h 55m

Bilbao

Tue 12/16

6:40 pm-7:52 pm

2 stops31h 12m

$919

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How to get the cheapest flight ticket from Washington, D.C. 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

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Other information

What is the cheapest month to fly to Bilbao?

The cheapest month to fly to Bilbao from Washington, D.C. is in February. Flight prices, which tend to average around $547, are often lower during this time because this is during the off-season. If you’re not able to fly to Bilbao in February, then October is your next best option. Flight prices from Washington, D.C. to Bilbao during October average around $566.

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

The cheapest day to depart from Washington, D.C. 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. 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. to Bilbao

Are you open to changing your travel dates? Check out the ideal times to fly from Washington, D.C. 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. to Bilbao (WAS to BIO) flight deals and tips

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

Direct flights	None

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

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How far is Washington, D.C. to Bilbao by plane?
There are 3738.8 mi between Washington, D.C. and Bilbao. In terms of flight time, this usually takes a little over 12h 00m.
When did momondo last update prices for flights from Washington, D.C. to Bilbao Airport?
Prices for flights from Washington, D.C. to Bilbao Airport refresh daily.
How many operators does momondo search for flights from Washington, D.C. to Bilbao Airport?
There are 5 operators available for flights from Washington, D.C. to Bilbao Airport as of November 2025.
How old do you have to be to fly from Washington, D.C. 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. to Bilbao Airport.
What documentation or ID do you need to fly to Bilbao Airport?
The travel and health documents you'll need for your trip to Bilbao Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Bilbao Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from Washington, D.C. to Bilbao?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Washington, D.C. to Bilbao is United Airlines (32% of total bookings). The next most popular airlines are Lufthansa (19%), Iberia (17%), and Delta (11%).

Best airlines flying from Washington, D.C. to Bilbao

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

Airline	Rating	Free Cancellation	Price
Lufthansa	PriceFrom $492	Free Cancellation	Rating 6.8 7,547 reviews	Search Lufthansa flights
KLM	PriceFrom $503	Free Cancellation	Rating 7.7 1,405 reviews	Search KLM flights
Iberia	PriceFrom $509	Free Cancellation	Rating 7.0 3,006 reviews	Search Iberia flights
United Airlines	PriceFrom $514	Free Cancellation	Rating 7.4 8,998 reviews	Search United Airlines flights

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Bilbao from Washington, D.C..

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

All flight searches from Washington, D.C. to Bilbao on momondo can be filtered to show those which offer flexible booking policies.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Bilbao from Washington, D.C..

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. to Bilbao from $344

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington, D.C. to Bilbao departing on 3/18. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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United Airlines flights from Washington, D.C. to Bilbao

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How to get the cheapest flight ticket from Washington, D.C. 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 month to fly to 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?

Our most recent data shows that the best time of day to fly to Bilbao is in the evening. Flights from Washington, D.C. 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.

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

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

What airlines fly to Bilbao?

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

Lisbon (LIS) was the most common stop: 35% of momondo users choosing 1-stop flights on this route connected there.

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

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

How long does it take to fly to Bilbao?

When to book flights from Washington, D.C. to Bilbao

Cheap Washington, D.C. to Bilbao (WAS to BIO) flight deals and tips

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

Direct flights

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

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

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

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

Best airlines flying from Washington, D.C. to Bilbao

Compare and see reviews for airlines that fly from Washington, D.C. 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