HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Bilbao

$294+ Cheap flights from Washington, D.C. (WAS) to Bilbao (BIO)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/22. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — BIO
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Washington, D.C. to Bilbao with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from Washington, D.C. to Bilbao are usually found in February or October, booked 69 days in advance, depart on a Monday or Tuesday and return on a Monday

Cheap flight deals from Washington, D.C. to Bilbao

Discover tips and strategies to find the most affordable flight options for your journey from Washington, D.C. (WAS) to Bilbao (BIO). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated June 12, 2025.

Round-trip from

$510
(CrystalTravel)

One-way from

$294
(Kiwi.com)

Popular in

December

Cheapest in

February

Average price

$866
From Washington, D.C. (WAS) to Bilbao
Search Deals
One-way flight from Washington, D.C. (WAS) to Bilbao
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($103 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($39 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2025
Search Deals

Find flight deals from Washington, D.C. to Bilbao

Cheapest flights from Washington, D.C. to Bilbao
Explore the most affordable flight options available from Washington, D.C. to Bilbao. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 12, 2025.

This oojo deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/285:45 pmIAD - BIO
1 stop11h 55mTAP AIR PORTUGAL
Wed 10/812:25 pmBIO - IAD
1 stop14h 25mTAP AIR PORTUGAL
Deal found 6/11$479
This Cheapflightsfares deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/14:35 pmIAD - BIO
1 stop9h 55mIberia
Wed 10/159:15 amBIO - IAD
1 stop11h 45mIberia
Deal found 6/11$485
This FlightHub deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/3010:20 pmIAD - BIO
1 stop19h 05mLufthansa
Tue 10/146:45 amBIO - IAD
1 stop15h 05mLufthansa
Deal found 6/11$489
This United Airlines deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/286:40 pmIAD - BIO
2 stops22h 45mUnited Airlines
Wed 10/86:45 amBIO - IAD
1 stop15h 05mUnited Airlines
Deal found 6/10$494
This SWISS deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/298:45 pmIAD - BIO
1 stop17h 30mSWISS
Tue 10/149:00 pmBIO - IAD
1 stop25h 15mSWISS
Deal found 6/11$496
This Air Canada deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/299:40 amDCA - BIO
2 stops24h 25mAir Canada
Thu 10/96:45 amBIO - DCA
2 stops15h 06mAir Canada
Deal found 6/11$497
This Air Canada deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/299:45 amIAD - BIO
2 stops24h 20mAir Canada
Wed 10/86:45 amBIO - IAD
2 stops20h 40mAir Canada
Deal found 6/11$504
This Delta deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/307:30 pmDCA - BIO
2 stops15h 10mDelta
Wed 10/811:05 amBIO - DCA
2 stops16h 09mDelta
Deal found 6/11$519
This Delta deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/285:25 pmBWI - BIO
2 stops17h 15mDelta
Wed 10/811:05 amBIO - BWI
2 stops17h 51mDelta
Deal found 6/10$520
This KAYAK deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/2310:05 pmIAD - BIO
1 stop29h 55mScandinavian Airlines
Fri 9/58:40 pmBIO - IAD
1 stop29h 19mScandinavian Airlines
Deal found 6/10$533
This Mytrip deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/59:45 amIAD - BIO
2 stops24h 20mMultiple Airlines
Sat 10/117:15 pmBIO - IAD
1 stop26h 35mMultiple Airlines
Deal found 6/11$537
This Delta deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/112:30 pmIAD - BIO
2 stops15h 55mDelta
Sat 10/117:10 amBIO - IAD
1 stop18h 05mDelta
Deal found 6/11$560

Cheapflights Fare Finder

Customize your flight search to find flights from Washington, D.C. to Bilbao that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 12, 2025.
Use the filters below to find and compare flights from Washington, D.C. to Bilbao that are best for you.

Fly from

Washington, D.C.

Fly to

Bilbao

Route

Depart

Return

Price

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Sun 9/28

5:45 pm-11:40 am

1 stop11h 55m

Bilbao

Wed 10/8

12:25 pm-8:50 pm

1 stop14h 25m

$479

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Wed 10/1

4:35 pm-8:30 am

1 stop9h 55m

Bilbao

Wed 10/15

9:15 am-3:00 pm

1 stop11h 45m

$485

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Tue 9/30

10:20 pm-11:25 pm

1 stop19h 05m

Bilbao

Tue 10/14

6:45 am-3:50 pm

1 stop15h 05m

$489

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Sun 9/28

6:40 pm-11:25 pm

2 stops22h 45m

Bilbao

Wed 10/8

6:45 am-3:50 pm

1 stop15h 05m

$494

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Mon 9/29

8:45 pm-8:15 pm

1 stop17h 30m

Bilbao

Tue 10/14

9:00 pm-4:15 pm

1 stop25h 15m

$496

Washington, D.C.Bilbao

DCA - BIO

DCABIO

Washington, D.C. Reagan-National

Mon 9/29

9:40 am-4:05 pm

2 stops24h 25m

Bilbao

Thu 10/9

6:45 am-3:51 pm

2 stops15h 06m

$497

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Mon 9/29

9:45 am-4:05 pm

2 stops24h 20m

Bilbao

Wed 10/8

6:45 am-9:25 pm

2 stops20h 40m

$504

Washington, D.C.Bilbao

DCA - BIO

DCABIO

Washington, D.C. Reagan-National

Tue 9/30

7:30 pm-4:40 pm

2 stops15h 10m

Bilbao

Wed 10/8

11:05 am-9:14 pm

2 stops16h 09m

$519

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Sat 8/23

10:05 pm-10:00 am

1 stop29h 55m

Bilbao

Fri 9/5

8:40 pm-7:59 pm

1 stop29h 19m

$533

Washington, D.C.Bilbao

IAD - BIO

IADBIO

Washington, D.C. Dulles Intl

Sun 10/5

9:45 am-4:05 pm

2 stops24h 20m

Bilbao

Sat 10/11

7:15 pm-3:50 pm

1 stop26h 35m

$537

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Showing 1-10 of 39 results
1
2
3
4

Best time to book a flight from Washington, D.C. to Bilbao

Have a flexible travel schedule? Discover the best time to fly to Bilbao from Washington, D.C. with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Washington, D.C. to Bilbao

How far ahead should I book a flight from Washington, D.C. to Bilbao?

Use this chart to determine the optimal time to book a round-trip flight from Washington, D.C. to Bilbao. Price data was last updated on June 9, 2025.

The best time to book flights from Washington, D.C. to Bilbao is 69 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest time of day to fly from WAS to BIO?

Find hourly flight availability from Washington, D.C. to Bilbao. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 12, 2025.

It’s typically best to fly out from Washington, D.C. to Bilbao in the evening. Doing so could potentially save you 15% on the flight price compared to flying at noon, which is usually more expensive.

Rainfall in Bilbao by month

Plan your trip to Bilbao by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Bilbao ranges from 2.4 - 5.6 inches per month. November is typically the wettest month, when rainfall can reach 5.6 in. July is typically the driest time to visit Bilbao when rainfall is around 2.4 in.

Temperature in Bilbao by month

Plan your trip to Bilbao by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Bilbao, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 68.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 48.2 F).

Reviews of airlines servicing Bilbao

Get insights into the airlines that provide service to Bilbao. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Bilbao. Reviews last updated June 12, 2025.
Get a feel of what it's like to fly with Delta, KLM and Air France from Washington, D.C. to Bilbao by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,950 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
KLM
7.8
Good
1,358 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Air France
7.5
Good
1,463 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
SWISS
7.5
Good
1,623 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,790 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

Find useful and relevant information for your journey from Washington, D.C. to Bilbao. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Bilbao from Washington, D.C.?

    If you book a flight to Bilbao from Washington, D.C., you will be flying to Bilbao, which is the city’s only airport. Bilbao (BIO) is located 3.0 mi from the center of Bilbao. There are 0 flights from Washington, D.C. to Bilbao per day from 5 different airlines.

  • What are the cheapest airlines flying from Washington, D.C. to Bilbao round-trip?

    Currently priced at $510, Lufthansa will fly you from Washington, D.C. to Bilbao and back. In addition to Lufthansa, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Air Canada and United Airlines - these airlines can fly you to your destination from $520 and $532, respectively. Lufthansa is currently priced 32% below the average price you’ll pay for this route.

  • What are the cheapest airlines to fly from Washington, D.C. to Bilbao one-way?

    The cheapest airline one-way is Iberia, with whom users have recently found tickets for as low as $406. However, be on the lookout for offers from TAP AIR PORTUGAL and SWISS, as they are both options that can get you from Washington, D.C. to Bilbao for a low price.

  • What are the most popular routes from Washington, D.C. to Bilbao?

    While some choose either Washington, D.C. Reagan-National - Bilbao or Baltimore/Washington - Bilbao, Washington, D.C. Dulles Intl - Bilbao is the most popular route from Washington, D.C. to Bilbao.

  • Can I find deals for flights from Washington, D.C. to Bilbao that include hotel bookings?

    Yes. In addition to deals on Washington, D.C. to Bilbao flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Washington, D.C. to Bilbao?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Washington, D.C. to Bilbao.

  • Can I find deals for business class flights from Washington, D.C. to Bilbao?

    Yes. Cheapflights offers flight deals from Washington, D.C. to Bilbao by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Washington, D.C. to Bilbao?

    Currently, January is the cheapest month in which you can book a flight from Washington, D.C. to Bilbao (average of $541). Flying from Washington, D.C. to Bilbao in June is currently the most expensive (average of $1,139). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Washington, D.C. to Bilbao

See prices for flight routes from nearby airports that may be better suited for you.
Dulles Intl to Bilbao flights
Reagan-National to Bilbao flights
Dulles Intl to San Sebastian flights
Reagan-National to San Sebastian flights

Top 5 airlines flying from Washington, D.C. to Bilbao

Discover the top 5 airlines that operate flights from Washington, D.C. to Bilbao. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
IberiaCheapest$431Average$872FlexibilityNo cancel feeOn-time77%
TAP AIR PORTUGALCheapest$449Average$826FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$507Average$700FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$591Average$760FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$605Average$820FlexibilityNo cancel feeOn-time76%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.