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IAD - BIO

$380 Find cheap flights from Washington Dulles Airport to Bilbao

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Dulles Intl to Bilbao departing on 8/23. 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
0 bags
Wed 6/5
Wed 6/12

Search hundreds of travel sites at once for deals on flights to Bilbao

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Washington, D.C. to Bilbao.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Washington, D.C. to Bilbao.
In the last 7 days travelers have searched 42,573,820 times on KAYAK, and here is why:

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Cheap flight deals from Dulles Intl to Bilbao (IAD-BIO)

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Dulles Intl 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 and deals for you by selecting your travel dates.
Choose your dates
8:45 pm - 7:35 amIAD-BIO
28h 50m1 stop
8:30 pm - 4:15 pmBIO-IAD
25h 45m1 stop
$562SWISS
Find Deal
Tue, Aug 20 - Tue, Aug 27
5:45 pm - 1:00 pmIAD-BIO
13h 15m1 stop
8:30 pm - 4:15 pmBIO-IAD
25h 45m1 stop
Tue, Aug 20 - Tue, Aug 27
1:15 pm - 11:15 amIAD-BIO
16h 00m2 stops
6:50 am - 4:00 pmBIO-IAD
15h 10m1 stop
$607Delta
Find Deal
Sun, Aug 11 - Wed, Aug 21
7:50 pm - 4:30 pmIAD-BIO
14h 40m2 stops
10:20 am - 4:10 pmBIO-IAD
11h 50m1 stop
$655Delta
Find Deal
Mon, Aug 19 - Sat, Aug 31
8:37 am - 5:50 pmIAD-BIO
27h 13m2 stops
6:45 am - 9:10 pmBIO-IAD
20h 25m2 stops
$734United Airlines
Find Deal
Mon, Aug 19 - Sat, Aug 31
10:25 pm - 5:35 pmIAD-BIO
13h 10m1 stop
12:10 pm - 3:20 pmBIO-IAD
33h 10m1 stop
$778TAP AIR PORTUGAL
Find Deal
Mon, Aug 5 - Wed, Aug 14
5:20 pm - 11:40 amIAD-BIO
12h 20m1 stop
7:35 pm - 3:15 pmBIO-IAD
25h 40m1 stop
$792TAP AIR PORTUGAL
Find Deal
Thu, Aug 22 - Tue, Aug 27
10:20 pm - 5:50 pmIAD-BIO
13h 30m1 stop
2:05 pm - 7:11 amBIO-IAD
23h 06m2 stops
$824United Airlines
Find Deal
Sun, Jul 14 - Wed, Jul 24
8:45 pm - 12:55 pmIAD-BIO
10h 10m1 stop
1:40 pm - 7:15 pmBIO-IAD
11h 35m1 stop
$842Iberia
Find Deal
Thu, Jul 18 - Thu, Jul 25
8:45 pm - 12:55 pmIAD-BIO
10h 10m1 stop
9:35 pm - 7:15 pmBIO-IAD
27h 40m1 stop
$852Iberia
Find Deal
Thu, Jul 18 - Wed, Jul 24

Flights from Dulles Intl to Bilbao - Travel Insights & Trends

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

What’s the cheapest day of the week to fly from Washington Dulles Airport to Bilbao?

The average price of all flights from Washington, D.C. Dulles Intl Airport to Bilbao clicked on KAYAK for each day over the last 12 months.
If you are looking for a flight deal from Washington Dulles Airport to Bilbao, look for departures on Mondays and avoid leaving on a Sunday, as it's usually the priciest day. When flying back from Bilbao, Monday is the cheapest day to fly and Thursday is the most expensive.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from Washington, D.C. Dulles Intl Airport 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. Dulles Intl Airport to Bilbao is January, where tickets cost $552 on average. On the other hand, the most expensive months are June and July, where the average cost of tickets is $1,241 and $1,107 respectively.

How far in advance should I book a flight from Washington, D.C. Dulles Intl Airport to Bilbao?

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for flights from Washington, D.C. Dulles Intl Airport to Bilbao, removes the top 0.1% to account for outliers, and then takes the average of all the values for each month.
To get a below average price on the flight from Washington, D.C. Dulles Intl Airport to Bilbao, you should book around 1 day before departure. For the absolute cheapest price, our data suggests you should book 75 days before departure.

Good to know

Low season

January

High season

September

Cheapest flight

$380
Best time to beat the crowds with an average 28% drop in price.
Most popular time to fly with an average 25% increase in price.
Flight from Washington Dulles Airport to Bilbao

When to book flights from Dulles Intl to Bilbao

Are your dates flexible? Find out the best times to travel from Dulles Intl 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 Washington Dulles Airport to Bilbao flights

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

    In the last 3 days, the lowest price for a flight from Washington, D.C. Dulles Intl Airport to Bilbao was $380 for a one-way ticket and $562 for a round-trip.

  • Do I need a passport to fly between Washington Dulles Airport and Bilbao?

    Yes, you’ll need a passport to travel to Bilbao from Washington Dulles Airport.

  • Which aircraft models fly most regularly from Washington Dulles Airport to Bilbao?

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

  • Which airline alliances offer flights from Washington Dulles Airport to Bilbao?

    Star Alliance, SkyTeam, and oneworld are the airline alliances operating flights between Washington Dulles Airport and Bilbao, with Star Alliance being the most commonly used for this route.

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

    The two airlines most popular with KAYAK users for flights from Washington, D.C. to Bilbao are Delta and KLM. With an average price for the route of $1,139 and an overall rating of 8.0, Delta is the most popular choice. KLM is also a great choice for the route, with an average price of $930 and an overall rating of 7.8.

  • How does KAYAK find such low prices on flights from Washington Dulles Airport 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 Dulles Airport to Bilbao.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Bilbao from Washington Dulles Airport 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 Dulles Airport 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 Dulles Airport with another airline. Booking your flights between Washington Dulles Airport and BIO can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Washington Dulles Airport 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 Dulles Airport up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top 5 airlines serving from Dulles Intl 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 Dulles Intl 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.
8.0
DeltaOverall score based on 10818 reviews
8.0Entertainment
8.2Boarding
7.9Comfort
7.4Food
8.6Crew
Airline reviews

Very frustrated with boarding gate crew. She announced the plane was small and they would be limiting us to one item to carry on. Not a problem for me as I understand the tiny planes have limited space!! Not the case here! It was a rather large plane and had plenty of room for bags! So because I don’t want to be one of “those people” who ignores the request to check a carry on I did so asking if I would be able to pick it up at the bottom of the ramp on arrival in Knoxville to which she responded “yes”! Then I watched as every other passenger held onto their 2 items and boarded!! Then when we arrived in Knoxville our 2 carry ons had been put with all the other luggage and we had to go to baggage pick up and wait for all the big checked bags to come off the carousel! So she lied!! Frustrating. Next time I won’t be so nice!

8.0 ExcellentCynthia, May 2024ATL - TYS
Read more about Delta reviews

Very frustrated with boarding gate crew. She announced the plane was small and they would be limiting us to one item to carry on. Not a problem for me as I understand the tiny planes have limited space!! Not the case here! It was a rather large plane and had plenty of room for bags! So because I don’t want to be one of “those people” who ignores the request to check a carry on I did so asking if I would be able to pick it up at the bottom of the ramp on arrival in Knoxville to which she responded “yes”! Then I watched as every other passenger held onto their 2 items and boarded!! Then when we arrived in Knoxville our 2 carry ons had been put with all the other luggage and we had to go to baggage pick up and wait for all the big checked bags to come off the carousel! So she lied!! Frustrating. Next time I won’t be so nice!

It was a good experience except when boarding a female flight attendant did not go out of her way to assist my teenage daughters in finding space for their carry-ons after their compartments were full.

On time departure, smooth trip, flight attendant told through passengers the gate we would arrive at and the gate our outbound flight was departing from. Early arrival

Checking in at the airport the agent only booked the first keg of my trip and had my checked luggage going to the airport with a layover! Never was issued a boarding pass for the second leg or received sticker fir my checked bag. All was well in the end! Delta agents helped to resolve the situation!!!

Delayed due to an ill passenger after loading. Not preventable on Delta's part. Was in first class. The seats are becoming worn and detaching from their velcro attachments. Only got snacks on flight. The attendant was not the friendliest.

I would fly again the whole experience was great. The only feed back I can give that they don't do that American Airlines does is the crew there is more humorous with boarding and thank their passengers. It makes it more fun to fly with them. I would however fly Delta again.

Big plane, long flight, absolutely no leg room and basically non existent air! I am 5”4’ and always travel Main Cabin, I was miserable on this plane and could barely move when we arrived in Cabo due to the cramped leg area!

From Atlanta to Cabo I would have hoped on a plane that size I would have been able to breathe and wiggle my feet a little! The leg room in that plane is non existent and I am only 5”4’. And the air vent either wasn’t working very well or just could not blow air from the ceiling to the seat area as I was suffocating through the entire flight! And please don’t say I would have been more comfortable in first class because I cannot afford those rates and have always travelled Main Cabin without issues !

The pilots were good. Disappointing when planes don't have electrical ports

I liked the piloting of the aircraft. Very disappointed about lack of electrical ports. Also, although a short flight. there was enough time to hand out snacks to comfort + seats as was done for first class.

Should have video screens Plane audio was poor and without wired connection hard to understand crew. Should serve more than just cups of water and pretzels on six hour flight. Did not see crew rest of flight. Fix charging sockets to retain charging blocks.

Food was terrible Not many options Stewards dont care Delay

The ride was good but no food ot entertainment hence, it was just over an hour flight.

they made me check my carryon. There was space in the overhead bins.

The plane was delayed 2 hours. The wifi did not work. The seat in first class was not comfortable because the bottom felt like it lost all of its padding. And I did not like when the flight attendant made me wait at my seat to use the bathroom and didn't tell me why. If there were too many people using the 1st Class bathroom, she should have told me to go in the back, coach bathrooms. I guess I have to feel fortunate that they found 2 local pilots to still fly the plane tonight after the original pilots ended up at an airport 60 miles away due to high winds.

The crew were really great, but the 4 hour delay in small chunks was the worst.

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

Every experience was good except for the lack of comfort in those economy seats. I never had knee pain until that flight. Those seats are uncomfortable.

I bought internet for the flight. Don’t waste your money. I wasn’t able to download a 1 Mb file from Google Docs during a 3-4 hr period. You can only use WhatsApp and email if you are willing to wait.

Just a crappy airline. The same every time. You feel you are a cow on a farm. You are being being whipped and pulled.

Thankful for 2-4-2 economy seating. Food was ok. Free beer & wine in economy was nice. Served hot dinner, mud- flight snack and pre-arrival ham sandwich. Seat with pillow & blanket. Reasonable movie options. Overall, a good experience. IBERIA APP is terrible terrible terrible.... needs to get upgraded to equivalent of TAP Airlines App. No option to bid or request an upgrade. Very disappointing.

My luggage did not get to my Miami destination/home. I am waiting for it 24 hours later.

The only comment I have is why do you sell snacks on board? They should be free. When we take domestic flights here in US, our snacks are free. Also, please communicate with me in English. I received so many emails way before my flight that were in Spanish that I had to ask my son to interpret for me. You should be WELL AWARE if the customers you are communicating speak the language, it does mean that we speak and understand Spanish because we are traveling to Spain, NOT NECESSARILY! Thank you!

Flight was delayed by well over an hour. Communication was terrible.

I like the team but I don't like the food you provided with money. I want free food and free water.

An average flight experience. For our transatlantic portion, they provided a main meal and two snacks. However, the food was not very tasty and the drinks far too small and infrequent for such a long flight. The regrettable part of the flight was that the toilets were extremely filthy. I feel this is unacceptable.

Both flights were delayed. I lost my connection on the way back. No voucher or anything was givenx I had business ticket and no support to make it on time. I got to the door running 5 min after they close. Food really bad. Breakfast in business was worst that I what I remember in economy. Even though I have accumulated many miles, I don’t think Inwill keep buying Iberia. I am a frequent business traveler.

The food is really eco only level. Breakfast was shameful. I am considering to stop flying with Iberia. Business prices are as expensive as other companies with much better service.

I called prior to flying to confirm our baggage allowance which was 5 bags. On our outbound flight thee were no problems. On the return flight we were charged for each bag totaling $400! We are working with customer service to resolve the issue.

Why no entertainment? Also water should be free, it is basic human right.

I thought Miami's airport was very disorganized during the Boarding.

Very efficient boarding - other airlines could learn from them. Friendly, efficient crew. Red eye flight, so dinner meal was irrelevant. Breakfast could have been more substantial. Seats reasonably comfy.

Disastrous boarding. Entered air bridge only to descend stairs and enter a bus. Plane had insufficient storage, was old and chair recline was damaged. Air stewardess was sullen.

Perfect although it took an hour to board the plane but other than that it was great

The flight crew was good, the flight itself was quick and comfortable

Boarding was late by 30 min due to a bus missing to take us to the plane... And then the flight was delayed by about 90 minutes, in a 60 min flight

The quality of the aircraft and the professionalism of TAP's staff were perfect. The quality of vegan meals can be hit or miss depending on the airline and the city of departure; on this flight, our vegan meals were quite good. The boarding process for the connecting flight in Lisbon could have been organized a bit better, but it did not spoil our overall experience with TAP, which was excellent. I'd definitely recommend TAP to others.

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.

O comissário não nos serviu bebida no jantar. Quando voltou somente serviu água.

Airline attendant never walks along the isle to check if everyone is ok. The food is worst I’ve experienced. Chicken pasta is very salty while the fish is bland and over-cooked. Only two toilets for the entire economy section.

Checked in is easy and it was a smooth flight from LAX to Munich

There is no recline on flight from DFW to FRA. Middle eastern airways provide better recline option for the same class. FRA to Bangalore has better recline option. I bid 100$ for premium economy, my request was declined. But staff handled it without issues.

The Lufthansa part was wonderful. The short connection flight was not.

German crew were very kind. Food was okay but can be better, especially bread was not good, Garbage collection was very poor.

Awful Terrible staff poor communication Flight delayed for an hour with no apology or explanation and no help re missing connecting flight. Resulted in a 7 hour layover at Munich waiting for another connecting flight. Only 15 euros refreshment voucher given. Will not fly Lufthansa again

Both flights were late for what appeared to be the airline’s not having the planes ready. Arrived over 6 hours late.

It was a busy flight and all the crew were very helpful and gracious

Seats were not the most comfortable and food options weren’t great but overall but everything else was excellent

Already stated....flights were fine. Late luggage a disappointment and failure my Lufthansa to get my bag delivered in a timely fashion.

Check-in very easy and smooth. Plane and crew were nice. Seat open next to me created more space. Food was fair but plentiful. Lots of movies and I was able to sleep some on the way to Munich. Very tight connection, about an hour. Fast through passport control and a bit of a walk to last G terminal gate but I made my connection to Palma. Unfortunately, my luggage did not make it. It is now almost 24 hours since I anded and still NO luggage. I know it landed last night on another flight. Local delivery should be today to my hotel in Palma but nothing yet. I asked about the tight connection when I checked in and was assured they would get my luggage to the connecting flight. Very disappointing it missed my flight but more disappointing that it has taken so long to arrive. Failure on the airlines and service to get my luggage to date.

Book cheap flights from Washington, D.C. to Bilbao

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from Washington, D.C. to Bilbao found on KAYAK in the last 72 hours.
8/23Fri
2 stops
20h 10mIAD-BIO
$380
8/23Fri
1 stopTAP AIR PORTUGAL
13h 40mIAD-BIO
$486
8/23Fri
3 stops
29h 45mIAD-BIO
$490
7/6Sat
1 stopTAP AIR PORTUGAL
20h 10mIAD-BIO
$569
7/6Sat
2 stops
17h 00mIAD-BIO
$579

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Last minute flights from Dulles Intl to Bilbao

Last minute flight, train and bus deals

 
These last-minute flight deals are the cheapest flights found on KAYAK in the last 72 hours for flights from Washington, D.C. to Bilbao that are departing in the next 10 days.
5/10Fri
multi-stopIberia
10h 10mIAD-BIO
5/17Fri
multi-stopIberia
11h 35mBIO-IAD
$976
5/10Fri
multi-stop
15h 45mIAD-BIO
5/15Wed
multi-stop
24h 15mBIO-IAD
$977
5/10Fri
multi-stop
18h 42mIAD-BIO
5/17Fri
multi-stop
17h 59mBIO-IAD
$985
5/10Fri
multi-stopAir Canada
25h 55mIAD-BIO
5/17Fri
multi-stopAir Canada
19h 44mBIO-IAD
$987
5/10Fri
multi-stopUnited Airlines
22h 55mIAD-BIO
5/17Fri
multi-stopUnited Airlines
15h 20mBIO-IAD
$1,011
5/10Fri
multi-stopAir Canada
25h 55mIAD-BIO
5/18Sat
multi-stopAir Canada
19h 44mBIO-IAD
$1,037
5/10Fri
multi-stopLufthansa
24h 17mIAD-BIO
5/19Sun
multi-stopLufthansa
13h 50mBIO-IAD
$1,038
5/10Fri
multi-stopLufthansa
18h 42mIAD-BIO
5/18Sat
multi-stopLufthansa
30h 50mBIO-IAD
$1,047
5/10Fri
multi-stopUnited Airlines
14h 10mIAD-BIO
5/19Sun
multi-stopUnited Airlines
17h 50mBIO-IAD
$1,049
5/10Fri
multi-stopTurkish Airlines
37h 35mIAD-BIO
5/15Wed
multi-stopTurkish Airlines
31h 30mBIO-IAD
$1,215

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Washington Dulles Airport - Bilbao Flights

Departure:

Washington Dulles Airport (IAD)United States

Destination:

Bilbao (BIO)Spain

Return flight deals:

Bilbao - Washington Dulles Airport

Cabin classes:

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