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IAD - BIO

$350 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 8/28. 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
Sat 6/29
Sat 7/6

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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 42,686,544 times on KAYAK, and here is why:

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

 
These are the cheapest deals for flights from Dulles Intl to Bilbao currently on KAYAK along with options from the most popular airlines KAYAK users selected for this route. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Recent round-trip flight deals from Dulles Intl to Bilbao

Recommended round-trip deals departing in the coming months from the most popular airlines that fly from Dulles Intl to Bilbao.

Recent one-way flight deals from Dulles Intl to Bilbao

Only flying one-way? Below are some of the best one-way flight deals from Dulles Intl to Bilbao found on KAYAK recently.

Recent last minute flight deals from Dulles Intl to Bilbao

Leaving soon but still want a bargain? Check out these latest deals for last minute flights from Dulles Intl to Bilbao.

Recent direct flight deals from Dulles Intl to Bilbao

The latest deals for direct flights from Dulles Intl to Bilbao so you can sit back and relax without the need for a layover.

Cheap bus & train deals from Dulles Intl to Bilbao

Find recent round-trip train or bus tickets from Dulles Intl to Bilbao.

All round-trip flight deals to Bilbao

The cheapest plane tickets to Bilbao found on KAYAK recently.
Discover the best prices and deals for you by selecting your travel dates.
Choose your dates
1:13 pm - 10:25 amIAD-BIO
15h 12m2 stops
5:35 pm - 7:15 pmBIO-IAD
31h 40m1 stop
Mon, Jul 1 - Wed, Jul 10
8:45 pm - 11:15 pmIAD-BIO
20h 30m1 stop
6:45 am - 8:30 pmBIO-IAD
19h 45m2 stops
$635British Airways
Find Deal
Tue, Jul 23 - Fri, Aug 2
5:57 pm - 4:30 pmIAD-BIO
16h 33m2 stops
6:50 am - 3:35 pmBIO-IAD
14h 45m1 stop
$714Delta
Find Deal
Sun, Aug 11 - Sat, Aug 24
10:30 pm - 11:45 amIAD-BIO
31h 15m1 stop
12:30 pm - 8:20 pmBIO-IAD
13h 50m1 stop
$720TAP AIR PORTUGAL
Find Deal
Tue, Jul 23 - Thu, Aug 1
10:20 pm - 11:40 amIAD-BIO
31h 20m1 stop
12:30 pm - 3:20 pmBIO-IAD
32h 50m1 stop
$753TAP AIR PORTUGAL
Find Deal
Wed, Jul 31 - Mon, Aug 12
5:57 pm - 4:30 pmIAD-BIO
16h 33m2 stops
10:20 am - 11:03 pmBIO-IAD
18h 43m2 stops
$796Delta
Find Deal
Sun, Aug 11 - Sat, Aug 24
10:20 pm - 5:50 pmIAD-BIO
13h 30m1 stop
7:00 pm - 1:30 pmBIO-IAD
24h 30m1 stop
$1,000Lufthansa
Find Deal
Sun, Jun 23 - Wed, Jul 31
10:10 pm - 10:50 pmIAD-BIO
18h 40m1 stop
6:45 am - 4:05 pmBIO-IAD
15h 20m1 stop
$1,158United Airlines
Find Deal
Sat, Jun 22 - Fri, Aug 2
5:30 pm - 5:50 pmIAD-BIO
18h 20m2 stops
7:35 am - 7:11 amBIO-IAD
29h 36m2 stops
$1,427United Airlines
Find Deal
Fri, Jun 28 - Fri, Jul 5
10:20 pm - 11:25 pmIAD-BIO
19h 05m1 stop
11:35 am - 7:25 pmBIO-IAD
13h 50m1 stop
$1,525Lufthansa
Find Deal
Sun, Aug 11 - Sat, Aug 24
6:50 pm - 10:40 pmIAD-BIO
21h 50m2 stops
Wed, Aug 28
10:25 pm - 5:35 pmIAD-BIO
13h 10m1 stop
$363TAP AIR PORTUGAL
Find Deal
Mon, Jul 22
8:30 pm - 8:15 amIAD-BIO
29h 45m3 stops
Mon, Jul 22
6:50 pm - 10:40 pmIAD-BIO
21h 50m3 stops
Wed, Aug 28
10:20 pm - 8:15 amIAD-BIO
27h 55m3 stops
Sun, Jul 21
8:30 pm - 10:40 pmIAD-BIO
20h 10m2 stops
Mon, Jul 22
5:40 pm - 10:15 amIAD-BIO
10h 35m1 stop
$422TAP AIR PORTUGAL
Find Deal
Wed, Aug 28
9:20 pm - 10:00 pmIAD-BIO
18h 40m1 stop
$491Air France
Find Deal
Sun, Jul 21
2:36 am - 8:30 amIAD-BIO
23h 54m3 stops
Sat, Jul 20
7:45 am - 9:55 pmIAD-BIO
32h 10m2 stops
$2,382Avianca
Find Deal
Sun, Jul 21

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 $988 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.

Which airlines provide the cheapest flights from Washington Dulles Airport to Bilbao?

The cheapest price for the route for each airline clicked by KAYAK users in the last 72 hours.
In the last 3 days, TAP AIR PORTUGAL offered the best one-way deal for that route, at $363. KAYAK users also found Washington Dulles Airport to Bilbao round-trip flights on British Airways from $635 and on Brussels Airlines from $638.

Good to know

Low season

January

High season

June

Cheapest flight

$350
Best time to beat the crowds with an average 28% drop in price.
Most popular time to fly with an average 48% 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 $350 for a one-way ticket and $627 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 $1,127 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 10457 reviews
7.9Comfort
8.6Crew
7.4Food
8.0Entertainment
8.2Boarding
Airline reviews

I've flown many many times on Northwest and then Delta. The crew on this flight were absolutely the best I've had the pleasure of being looked after by.

10.0 ExcellentAnonymous, May 2024MSP - YVR
Read more about Delta reviews

I've flown many many times on Northwest and then Delta. The crew on this flight were absolutely the best I've had the pleasure of being looked after by.

Flew first class so everything was great. But maybe because the flights were red eye, no meals were served, just chips. I flew Alaska Air 1st class at 9PM (2 hour flight) and they served beef short rib sliders!

Had to change aircraft due to a faulty door. Surprisingly it only caused about an hour and a half of delay. Delta handled this situation as well as can be expected.

Awful. Flight was continuously getting delayed and gates kept changing without any reason. Flight was delayed for more then 3 hours

Paid premium for Delta only to be on safe but tired old 767 with ancient cabin in mediocre condition. Poor wifi and horrible inflight entertainment. Hardly a premium experience. Should have flown SW and had fun flight crew and no pretense

Our flight to Zurich was delayed by almost 3 hours, so we missed our next flight. There was no indication it would be delayed this much. We were told the gate had changed and then it apparently took over 2 hours to load the "catering" on the plane. We were not compensated in any way for the trouble.

Rated entertainment as Mediocre as there were major problems with the Infotainment system that took probably a half hour for them to fix.

Your crew could maybe answer the call bell at least one of the times I pressed it. I pressed it first time with 2.5 hours left in our flight bc my partner was hungry and wanted a sandwich. We finally got the sandwich with 40 mins left in the flight.

Half the bathrooms assigned to economy were out of action

Delta crushed it. Flight attendant in first was attentive and just never stopped. Honestly one of the best domestic flights I’ve been on.

We ended up with seats in the very back. So they did not recline. Have no idea why, we reserved and checked in very early. The isles were very narrow and the seats had very little leg room. But they did give us water, and a snack.

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.

Pretty fair for the price of the plane ticket. Food was poorly, but overall was a ok experience for a super long flight.

Good. Madrid to SFO was way better than ARN to Madrid. Mercifully, the seats to Madrid didn't recline. So although there was no leg room, your knees didn't get crushed

Overall was good except for the seat which, for an 8 hour intercontinental flight, was uncorfortable. For that kind of flight seats should have more space, even for economy seats.

Needed more info on connecting flight. Late flight made very short connection. Lost luggage that we still do not have!

Seats comfortable on economy plus and attendants very helpful. Food was ok. Bathrooms needed servicing.

Good food, prompt and timely flight, good on-board personnel

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.

Delayed takeoff was inconvenient. We should have boardrd later. Coffee/ beverage service on a 7:30 flight would have been good.

Flight from Lisbon to Barcelona was ok. Business flight Boston to Lisbon was awful. Attendants should pay more attention to Business Passengers and not be so stingy with water. Worse Business Flight I have ever taken. Food was awful. Cramped for space.

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.

Will try to not fly with them again. Delays because of weather but got redirected to an airport where I could not make connection.

Staff didn’t care in business class. Closed the door on my mom while she was on the jetbridge and flight attendant told me she would make it from the connecting flight. They lied. My luggage was damaged on arrival. No success in filing damage claim.

Boston Logan is a crummy airport - signage is terrible or lacking in areas. Boarding seemed to be a free for all and with all the different airlines speaking, you couldn't tell who was supposed to be where and when. Plain and simple, airlines should board from the back of the plane to the front. Also someone was sitting in my seat. By the time that was figured out, I had to place my overhead behind me which made de-planing more difficult. Logan is not Lufthansa's fault so that is not on them, Boarding is on them! Still, overall it was a Good Experience flying with Lufthansa. This is not my first flight with them...

Overall, the flight was comfortable without any serious issues. Transit through Frankfurt airport was a little confusing, but not too difficult if you follow the signs

There was a screaming child behind our seats. This prevented us from getting any sleep during the night.

There was a screaming child just behind our seats. This prevented us from getting any sleep during the night!!

Staff disappeared after dinner service until breakfast, no help with beds, no help running to our gate to catch connection cause flight was late, our luggage didn’t make it, took over 24 hours to get luggage to hotel, no compensation!!

Everything was good except food. I believe there is room for improvement

Houston to Porto flight delayed landing made us miss our connection. Tried to get on standby for the next flight and even though the lady knew we wouldn’t be able to get on it and she sent us down there. We sat there three hours and then we’re told there’s no way you’re getting on this flight. So we had to go to customer service and ended up having to spend the night in Frankfurt and missed a whole day of our vacation in Porto

my flight was at 3:45 after that they delayed to 4:40 I have transit from Chicago to Frankfurt and Frankfurt to vina airport from vina to Erbil buy the Time I come to Frankfort my other flight left me I have to stay at airport all day with my 5 kids ask for help no one help me I spent at airport almost $450 just for food was horrible flight ever I call and ask for hotel from united customer service they been telling me we can’t provide any hotel I need some refund or fixed my flight when I return to America need some one respond my email

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.
8/28Wed
2 stops
21h 50mIAD-BIO
$350
7/22Mon
1 stopTAP AIR PORTUGAL
13h 10mIAD-BIO
$363
7/22Mon
3 stops
29h 45mIAD-BIO
$382
8/28Wed
3 stops
21h 50mIAD-BIO
$417
7/21Sun
3 stops
27h 55mIAD-BIO
$419
7/22Mon
2 stops
20h 10mIAD-BIO
$421
8/28Wed
1 stopTAP AIR PORTUGAL
10h 35mIAD-BIO
$422
7/21Sun
1 stopAir France
18h 40mIAD-BIO
$491
7/20Sat
3 stops
23h 54mIAD-BIO
$999
7/21Sun
2 stopsAvianca
32h 10mIAD-BIO
$2,382

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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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