WAS - BIO

$260 Find Cheap Flights from Washington, D.C. to Bilbao - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Washington, D.C. to Bilbao departing on 9/1. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$574
Typical prices: $603-$744
TAP AIR PORTUGAL
Mon 8/17Tue 9/1
IAD - BIO • 1 stop
Cheapest one-way
$260
Multiple Airlines
Tue 9/1
IAD - BIO • 3 stops
Top airlines
Cheapest • from $574 (round-trip)
Best reviews • 7.8 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Washington, D.C. and Bilbao. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $559 (round-trip)
Shortest trip • 10h 40m (one-way)
Insights
Insights
Insights
Insights
When to travel
Cheapest • 32% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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We hope you love your trip to Bilbao!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Washington, D.C. to Bilbao (WAS-BIO)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Washington, D.C. to Bilbao that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Washington, D.C. to Bilbao

Mon, Aug 17 - Tue, Sep 1
TAP AIR PORTUGAL Logo
10:35 pm - 11:40 am
IAD
-
BIO
31h 05m
1 stop
TAP AIR PORTUGAL Logo
6:50 pm - 3:10 pm
BIO
-
IAD
26h 20m
1 stop
$574TAP AIR PORTUGAL
Wed, Sep 23 - Wed, Sep 30
TAP AIR PORTUGAL Logo
5:45 pm - 11:30 am
IAD
-
BIO
11h 45m
1 stop
TAP AIR PORTUGAL Logo
12:25 pm - 8:35 pm
BIO
-
IAD
14h 10m
1 stop
$574TAP AIR PORTUGAL
Tue, Sep 22 - Tue, Sep 29
TAP AIR PORTUGAL Logo
5:05 pm - 11:40 am
IAD
-
BIO
12h 35m
1 stop
TAP AIR PORTUGAL Logo
6:50 pm - 3:10 pm
BIO
-
IAD
26h 20m
1 stop
$577TAP AIR PORTUGAL
Fri, Nov 6 - Sat, Nov 21
Royal Air Maroc Logo
9:05 pm - 6:45 pm
IAD
-
BIO
15h 40m
1 stop
Royal Air Maroc Logo
7:45 pm - 7:05 pm
BIO
-
IAD
29h 20m
1 stop
$686Royal Air Maroc
Wed, Nov 4 - Wed, Nov 18
Lufthansa Logo
10:55 pm - 5:45 pm
IAD
-
BIO
12h 50m
1 stop
Lufthansa Logo
11:45 am - 8:05 pm
BIO
-
IAD
14h 20m
1 stop
$707Lufthansa
Wed, Oct 7 - Mon, Oct 12
Multiple Airlines Logo
5:45 pm - 7:20 pm
IAD
-
BIO
19h 35m
2 stops
Multiple Airlines Logo
11:05 am - 3:10 pm
BIO
-
IAD
34h 05m
2 stops
$712Multiple Airlines
Wed, Nov 4 - Wed, Nov 18
Multiple Airlines Logo
10:55 pm - 9:55 pm
IAD
-
BIO
17h 00m
1 stop
Multiple Airlines Logo
7:30 am - 8:10 pm
BIO
-
IAD
18h 40m
2 stops
$715Multiple Airlines
Wed, Nov 4 - Tue, Nov 17
Lufthansa Logo
10:55 pm - 9:55 pm
IAD
-
BIO
17h 00m
1 stop
Lufthansa Logo
6:45 am - 3:55 pm
BIO
-
IAD
15h 10m
1 stop
$726Lufthansa
Sun, Nov 1 - Tue, Nov 17
United Airlines Logo
10:55 pm - 5:45 pm
IAD
-
BIO
12h 50m
1 stop
United Airlines Logo
12:25 pm - 8:05 pm
BIO
-
IAD
13h 40m
1 stop
$727United Airlines
Sun, Nov 1 - Fri, Nov 20
United Airlines Logo
5:35 pm - 9:55 pm
IAD
-
BIO
22h 20m
1 stop
United Airlines Logo
6:45 am - 3:55 pm
BIO
-
IAD
15h 10m
1 stop
$727United Airlines
Booking Insights

KAYAK's insights & trends for Washington, D.C. to Bilbao flights

Get data-powered insights and trends into flights from Washington, D.C. to Bilbao to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from Washington, D.C. to Bilbao?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Washington, D.C. to Bilbao departing in August.

Flight prices are below average for this route right now.

Flights to Bilbao from Washington, D.C. usually cost between $594 and $1,067 in August.
The lowest price found in the past 5 days was $574 on TAP AIR PORTUGAL (Aug 17-Sep 1).

What is the cheapest month to fly from Washington, D.C. to Bilbao?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Washington, D.C. to Bilbao, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Washington, D.C. to Bilbao is January, where tickets cost $533 (return) on average. On the other hand, the most expensive months are June and July, where the average cost of round-trip tickets is $1,022 and $1,006 respectively.

Good to know

Low season

December

Cheapest flight

$260
Best time to beat the crowds with an average 20% drop in price.
Most popular time to fly with an average 16% increase in price.
Flight from Washington Dulles Airport to Bilbao

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

Are your dates flexible? Find out the best times to travel from Washington, D.C. to Bilbao based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Washington, D.C. to Bilbao

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

    In the last 5 days, the lowest price for a flight from Washington, D.C. to Bilbao was $260 for a one-way ticket and $574 for a round-trip.

  • Do I need a passport to fly between Washington, D.C. and Bilbao?

    Yes, you’ll need a passport to travel to Bilbao from Washington, D.C..

  • Which airports will I be using when flying from Washington, D.C. to Bilbao?

    Washington, D.C. is served by 2 major airports and there is only 1 main airport in Bilbao. You will leave Washington, D.C. from one of these airports: Washington, D.C. Reagan-National or Washington, D.C. Dulles Intl. You will be arriving at Bilbao.

  • Which aircraft models fly most regularly from Washington, D.C. to Bilbao?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Washington, D.C. to Bilbao?

    Star Alliance is the only airline alliance operating flights between Washington, D.C. and Bilbao.

  • Which is the best airline for flights from Washington, D.C. to Bilbao, Delta or United Airlines?

    The two airlines most popular with KAYAK users for flights from Washington, D.C. to Bilbao are Delta and United Airlines. With an average price for the route of $831 and an overall rating of 7.8, Delta is the most popular choice. United Airlines is also a great choice for the route, with an average price of $1,043 and an overall rating of 7.4.

  • How does KAYAK find such low prices on flights from Washington, D.C. to Bilbao?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Washington, D.C. to Bilbao.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Washington, D.C. to Bilbao?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Bilbao from Washington, D.C. is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Washington, D.C. to Bilbao?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Bilbao with an airline and back to Washington, D.C. with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Washington, D.C. to Bilbao?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Bilbao from Washington, D.C. up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 4 airlines serving from Washington, D.C. to Bilbao

 
See real verified KAYAK customer reviews for airlines flying from Washington, D.C. to Bilbao. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Washington, D.C. to Bilbao? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.8
DeltaOverall score based on 8487 reviews
8.1Boarding
7.8Comfort
7.8Entertainment
7.2Food
8.5Crew
Airline reviews

Flight was delayed for about an hour but overall good experience

8.0 ExcellentNana, Jul 2026
DCA - ATL
Read more Delta reviews

Flight was delayed for about an hour but overall good experience

Very good seat and service. No complaints about the food. Take off delayed due to airport traffic

The gentleman at the gate I think his name is RIE was exceptional

This flight was no comparison to our prior flight. I'm thinking it all has to do with the age of the aircraft.

2 of the seats in row 31 the entertainment system was not working, and one seat the tray table did not go all the way down. Flight arrived early and departed on time which was great.

Waited at the usual crowded gate at DCA where one ends up standing up because there aren't enough seats.

Delayed take-off. Very small plane so very scary with lots of bumps during the flight. Would never fly Delta on short flights in small 80 seaters plane again! Felt relieved when landed.

Inexpensive, got an exit row aisle aeat with no middle passenger, bought a great breakfast sandwich, flight comfortable & arrived ahead of schedule.

I wouldn't say I liked being forced to check my small roller bag at the gate; too many people had bags and were in a higher boarding group.

715PM departure was 2.5 hours late. Received hotel & food voucher but after we already booked a room. Entire team just seemed like they were 2-3 steps behind in execution, and notifcations.

My flight was delayed so bad i missed u it so i just said never mind

Delayed 2 hours while stuck on the aircraft. If the luggage was properly loaded the first time we probably wouldn’t have been delayed at all

1. Everything was satisfactory concerning the flight. 2. Can't think of what could be better right now.

Onboard staff was courteous, helpful, responsive and friendly. The boarding process was disorganized, poorly communicated, and disheveled. Gate agents were yelling instead of using the PA system, didn’t communicate the timing delay of our flight, and created an atmosphere of chaos rather than order and communication. As far as I know, there was no reason for their. I would hate to see how it operated under extreme conditions. I’ve never seen United Airlines operations in such a state.

The flight did not have its customary snacks during the flight. Apparently they were never loaded on the plane.

Worst service- attendants dont want to help and sat us in front of bathroom

We sat on the hot plane for ours with very conflicting messages. Some (most?) of this may be due to the flight control staff, but we were also repeatedly getting "we are leaving"/"we are not" messages. It was very uncomfortable

Staff could’ve been a little more cordial. The men were much more friendlier than the women. My daughter and I also missed the 2nd to last meal as we were sleeping but that is on us.

I flew Delta last week and United Airlines is a poor substitute mechanical problems with the plane and shitty food among other things made my travel experience what’s become to be expected from United no way is it ever worth the money they make us pay

No in flight entertainment, gate employees were very quick and impatient, plane was uncomfortable

Negative. Food was awful, seat broken, flight was late, baggage lost and damaged

Poor. Our flight was delayed and they told me I would be fine to make my connection in Lisbon, I missed it. Then they told me my bag would be automatically loaded onto my new flight to rome. It wasn’t. It’s been 4 days and I still don’t have it.

Plane was delayed, reading the gates on their screens was horrible. They posted it a half an hour before the plane boarded. By the time I got there with my premier boarding they have filled the plane because it was over booked. Gate closed at 12:03 I was there at 11:54 plane took over around 12:20. I was told they would put me on the next flight. I had to go to TAP information desk. They didn’t give me a voucher they just said they would put me on the next flight. At the desk I was told I had to punches a ticket. The woman said buy it online because it’s cheaper. It in fact was not cheaper. But I had gotten out of the long line that formed so I paid 200$ for a new ticket. At a later flight, not the next flight. I had checked my bag and was told it would be on my new flight. I was then bumped to an earlier flight and was told my bag would also be on my flight. After landing in Madrid loosing a day in my hotel i landed without my bag. They didn’t load it on any flight that day. It arrived in madrid the next day. Essentially ruining the first two days of my vacation. I’m now seeking compensation.

The person at the checkin was very helpful. We couldn’t check in through the keyosk, but the agent was very helpful.

The seats were not designed to comfortably see people in coach for more than 10 minutes

Checked bG chstgr was extremely high. Over $120. It was s bsit and switch knowing an international passenger would have t9 check a bag.

On time, politeness, food okay but entertneiment mediocre with only old movie and the so called new we’re 2 or 3…

Everything went very well. I would like to acknowledge the politeness and professionalism of the staff—they are superb. No complaints.

No legroom, have to pay for everything including water?!? Water is more expensive than beer?

We liked the crew. They were competent, professional and friendly. The only big negative was our departure was delayed several times and the airport staff did not communicate what the problems were and what we should expect.

Very efficient and excellent service. Nice amenities and beautiful plane. Elevated meals. Boarding could have been more organized. We missed our connecting flight due to EU entry but Lufthansa was extremely quick to rebook us.

Missed it by a couple minutes and couldn’t find an alternative flight so had to spend the night in DC and after much shuffling from 1 airline to another managed to get a United to Frankfurt.

There were only 2 toilets and one of them did not work in business class. We are not allowed to cross classes so had to wait in line to use the toilets!! The entertainment touch display was finicky and did not work all the time.

The flight and crew were good. The customer experience on the ground could have been better. We had to reschedule our flight because of a delay on the previous flight. The attendants working the desk in Washington DC were not helpful. They told us to scan a QR code and that would get us rebooked. Why couldn't two people standing at their computers do this? We had to chat with someone to get everything figured out. It was extremely confusing.

good entertainment package but rather small seats for business class

The male attendant has zero personality. It seemed like he was over worked or hated his job, not once did he smile or made any contact with the people on the plane. Strictly business and call it a day!

Our flight was delayed for over an hour due to weather, and it had already been a long travel day. However, the crew was calm and compassionate, listening to every complaint with genuine concern. They got us home safely without incident, in spite of all of the obstacles. I’m grateful.

Bad! Disaster!! The LH419 was cancelled after 4 hrs on board with no AC and no toilets

It was good although we could not land in Munich due to weather and we had to go to Stuttgart. Missed our second flight. They did get us on another flight but the seats where not the ones I paid for in the flight that we missed.

In this flight was no good it was delay, change of door

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

Information on your arrival and departure airports