BOS - BIO

$281 Find Cheap Flights from Boston 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 Boston to Bilbao departing on 7/21. 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

KAYAK searches 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 Boston to Bilbao.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Boston to Bilbao.
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Everything you should know

Cheapest round-trip
$806
Typical prices: $647-$893
Multiple Airlines
Mon 8/10Tue 8/25
BOS - BIO • 3 stops
Cheapest one-way
$281
Typical prices: $454-$563
Multiple Airlines
Tue 7/21
BOS - BIO • 2 stops
Top airlines
Cheapest • from $810 (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 Boston and Bilbao. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $776 (round-trip)
Shortest trip • 10h 41m (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 Boston to Bilbao (BOS-BIO)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Boston 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 Boston to Bilbao

Mon, Aug 10 - Tue, Aug 25
Multiple Airlines Logo
10:40 am - 2:50 pm
BOS
-
BIO
22h 10m
3 stops
Multiple Airlines Logo
7:55 am - 5:40 pm
BIO
-
BOS
15h 45m
2 stops
$806Multiple Airlines
Mon, Aug 10 - Tue, Aug 25
Multiple Airlines Logo
10:40 am - 2:50 pm
BOS
-
BIO
22h 10m
3 stops
Multiple Airlines Logo
9:05 pm - 5:40 pm
BIO
-
BOS
26h 35m
3 stops
$807Multiple Airlines
Mon, Aug 10 - Tue, Aug 25
Multiple Airlines Logo
3:35 pm - 2:50 pm
BOS
-
BIO
17h 15m
3 stops
Multiple Airlines Logo
7:55 am - 5:40 pm
BIO
-
BOS
15h 45m
2 stops
$808Multiple Airlines
Wed, Jul 22 - Wed, Jul 29
British Airways Logo
12:25 pm - 8:30 am
BOS
-
BIO
14h 05m
2 stops
British Airways Logo
9:15 am - 9:10 pm
BIO
-
BOS
17h 55m
2 stops
$810British Airways
Mon, Oct 19 - Sun, Oct 25
Multiple Airlines Logo
6:50 pm - 6:35 pm
BOS
-
BIO
17h 45m
2 stops
Multiple Airlines Logo
6:50 am - 9:45 pm
BIO
-
BOS
19h 55m
3 stops
$813Multiple Airlines
Thu, Aug 6 - Mon, Aug 10
United Airlines Logo
6:05 am - 4:00 pm
BOS
-
BIO
27h 55m
2 stops
United Airlines Logo
11:55 am - 3:10 pm
BIO
-
BOS
33h 15m
2 stops
$818United Airlines
Wed, Jul 8 - Sat, Aug 1
KLM Logo
5:20 pm - 11:55 am
BOS
-
BIO
12h 35m
1 stop
KLM Logo
8:20 am - 4:31 pm
BIO
-
BOS
14h 11m
1 stop
$819KLM
Thu, Aug 6 - Mon, Aug 10
British Airways Logo
6:00 am - 8:30 am
BOS
-
BIO
20h 30m
2 stops
British Airways Logo
9:35 pm - 7:50 pm
BIO
-
BOS
28h 15m
1 stop
$822British Airways
Mon, Jul 20 - Sat, Aug 1
TAP AIR PORTUGAL Logo
10:45 pm - 6:00 pm
BOS
-
BIO
13h 15m
1 stop
TAP AIR PORTUGAL Logo
6:35 pm - 2:40 pm
BIO
-
BOS
26h 05m
1 stop
$826TAP AIR PORTUGAL
Mon, Jul 20 - Sat, Aug 1
United Airlines Logo
8:27 pm - 10:45 am
BOS
-
BIO
32h 18m
1 stop
United Airlines Logo
11:55 am - 5:40 pm
BIO
-
BOS
11h 45m
1 stop
$828United Airlines
Booking Insights

KAYAK's insights & trends for Boston to Bilbao flights

Get data-powered insights and trends into flights from Boston 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 Boston 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 Boston to Bilbao departing in August.

What is the cheapest month to fly from Boston to Bilbao?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Boston 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 Boston to Bilbao is March, where tickets cost $495 (return) on average. On the other hand, the most expensive months are July and April, where the average cost of round-trip tickets is $1,082 and $874 respectively.

How far in advance should I book a flight from Boston to Bilbao?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Boston to Bilbao, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Boston to Bilbao, you should book around 1 week before departure. For the absolute cheapest price, our data suggests you should book 26 weeks before departure.

Good to know

Low seasonFebruary
Cheapest flight$281
Best time to beat the crowds with an average 18% drop in price.
Most popular time to fly with an average 48% increase in price.
Flight from Boston to Bilbao

When to book flights from Boston to Bilbao

Are your dates flexible? Find out the best times to travel from Boston 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 Boston to Bilbao

  • What is the cheapest flight from Boston to Bilbao?

    In the last 5 days, the lowest price for a flight from Boston to Bilbao was $281 for a one-way ticket and $810 for a round-trip.

  • Do I need a passport to fly between Boston and Bilbao?

    Yes, you'll most likely have to show a valid passport before boarding the plane in Boston and on arrival in Bilbao.

  • Which airports will I be using when flying from Boston to Bilbao?

    Boston airport is called Boston Logan Intl and the only airport in Bilbao is Bilbao.

  • Which aircraft models fly most regularly from Boston to Bilbao?

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

  • Which airline alliances offer flights from Boston to Bilbao?

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

  • Which is the best airline for flights from Boston to Bilbao, KLM or Delta?

    The two airlines most popular with KAYAK users for flights from Boston to Bilbao are KLM and Delta. With an average price for the route of $989 and an overall rating of 7.8, KLM is the most popular choice. Delta is also a great choice for the route, with an average price of $985 and an overall rating of 7.8.

  • How does KAYAK find such low prices on flights from Boston 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 Boston to Bilbao.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Bilbao from Boston 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 Boston 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 Boston with another airline. Booking your flights between Boston 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 Boston 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 Boston up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 5 airlines serving from Boston to Bilbao

 
See real verified KAYAK customer reviews for airlines flying from Boston 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 Boston 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
KLMOverall score based on 1531 reviews
7.3Food
7.7Comfort
7.8Boarding
8.4Crew
7.2Entertainment
Airline reviews

The crew were unprofessional with a racist element. I was physically abused as well from one of the crew members

2.0 MediocreNewton, Mar 2026
IAD - AMS
Read more KLM reviews

The crew were unprofessional with a racist element. I was physically abused as well from one of the crew members

They forgot to serve food and the crew was very unfriendly. Never experienced such a bad KLM flight. Usually fly from Toronto. New York was different.

Over 1 Hr delay. No APU so no AC on ground. Plane was hot during boarding and then they closed the doors over 20 minutes before engine start so interior of plane was steamy hot and stuffy. Could have been helped by opening doors until ready to depart.

My flight was delayed by 6 hours then I missed BOTH of my connecting flights, I then had to stay in the AIRPORT at JFK because soooooo many people also suffered from missing flights and there was no hotels available. I would like to be compensated for this experience! I had to stay in the airport for over 16 hours!

Cabin crew were excellent, very proffesional, polite and friendly, in flight snack was underwhelming, a packet of cheese biscuits, im sure KLM could run to a sandwich!

Overall very positive. Boarding was quick and organized. Cabin was clean and seats were reasonably comfortable. Cabin crew was excellent and the meals provided were also of good quality

This fight left ahead of time which meant it arrived early which was great. Staff were very professional, but as with all these Short hop Flights the food was a disappointing snack There was no entertainment on this flight, but I did not expect any

Transfer at CDG to connecting KLM flight to Amsterdam was a NIGHTMARE. LONG WALKWAYS, NO MOVING WALKWAYS, POOR signage, Have to take a train & No staff visible to help navigate the maze. AVOID TRANSFER AT CDG AT ALL COST.

Seats were comfortable crew members support was very good but AVML ordered or selected by us needs a lot of improvement.

Transavia flight, was booked as KLM but i couldnt select seat or access boarding pass with KLM at all. Crammed seating and very no frills experience all around. First and last time.

I thought the service was very nice and pleasant. There were no hiccups and no issues so overall a good experience.

It was a pleasant surprise to have complimentary Wi-Fi on the flight

Flight was delayed, we could have been notified earlier and in a consistent manner. App was not refreshing for another passenger to get the latest flight status. We could have stayed and waited at the hotel instead of waiting at the airport had we known the flight was going to delayed for more than 5 hours. The toilet is too tight, and needs to be cleaned more frequently (every hour). The entertainment screen froze, the touch screen not responding to touch. We were upgraded to comfort, it is more comfortable than regular economy seats.

The baggage belt was not updated on the Delta App and was displayed on the wrong belt board. Was not expecting this to happen.

The plan was delayed and left DC 90 minutes late. However, it showed a 20 minute delay on the delta app, then a 12 min delay. It turned out to be an hour delay. I found out where the plane was with flightaware. Stop keeping customers in the dark about what is going on.

Pilots lied about waiting on “paperwork”. Sat in the plane for over an hour, waiting on some papers to be printed according to the pilot and then all of a sudden he says good news maintenance is finally on their way. Maybe they can fix it before we get our paperwork. Ended up missing my connection in LaGuardia and as a result, had a fly home to Lexington instead of the Louisville airport. Then paid $100 to uber to Louisville since it was midnight by the time I got in. I wish they would just be transparent with passengers sometimes and not try to beat around the bush on why things are delayed.

One of the flight attendants was a little cranky. I appreciated the free wifi and plug to charge my laptop

The flight was smooth, the crew was great but the plane was quite old

The flight was delayed 90 minutes The Gate was wrong The Restroom on Aircraft was not clean There was a half used water bottle in my seat

Cabin was not pressurized properly. Several passengers had respiratory difficulties.

Boarding was great, and the crew were very friendly. The seats must have been a bit on the older side and you could feel some of the seat components through the padding. Also, the plugs did not work on the row's entertainment screen or charging ports. Checked bag was transferred for connecting flight, and we appreciated how early we had the connecting gate information.

It was Swiss. Our kosher meals were literally frozen solid and therefore inedible, and the crew didnt care.

Food was great. Staff was phenomenal. Seats were a bit hard and could use a lot more entertainment options as far as movies to choose from. WiFi was good. Overall great trip.

The flight was delayed, they didn’t even have water for the toilets or for drinks

It’s always a great time flying with united airlines.

Very old flight - time to retire it for newer airplanes

2+ hours delayed Outlet in row 12 did not work Tv monitors did not work Lights kept off the entire flight for at 5pm-7pm flight

Seated dude next to me even though lots of empty rows. But main thing was we sat on the tarmac after landing for 30 minutes because of, in the words of the dude who sat next to me, “operational incompetence”. We got changing directions about where to pick up gate checked bags. Pilot and flight attendant were awesome though.

They brought an empty plane to the gate. Then a flight delay was announced for maintenance and waiting on a part. I was then put on a flight to San Francisco instead with a connecting flight to my final destination. Arrived at my final destination 2 hours late.

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

The flight was canceled on a Thursday last minute. I lost thousands of dollars in hotels and car rental

Really like the idea experience on this airline I will use again

The food on the flight was of marginal quality. Small bits of chicken, instant mashed potatoes and some carrots. The rolls were very dry, nearly inedible. The seats were quite small and didn’t allow for any shifting of position during the flight. There was limited leg room.0

It was a good flight overall. Nothing to add. Keep it up!

We liked the flight but while we purchased an aisle seat, our seats had a different configuration on this flight. A fellow passenger suggested that the airplane had been changed. Too bad we were not informed and had no chance to modify our seat preferences. We were stuck in the window and middle seats with no chance to walk around and go to the bathroom without disturbing our sleeping fellow passenger.

Moved the flight an hour later, were not reliable about confirmation, website didn't work, no gate information, boarding was a mad house. Flight itself was fine and short. Organization needs work.

Not having to check carry on bags when plane wasn’t full. (The told us it was)

The connection required us to travel from terminal A to terminal E with very little time in between flights. While waiting in line, we were called to the service desk to provide our passports. We provided our passports at time of check in, assuming that American Airlines doesn’t communicate well with Iberia, this was a headache.

First flight was 5.5 hours delayed, the notification came within 2 hours of the flight (bags already checked in). connection missed- no one working on getting us on an alternate flight, knowing where our luggage will be. It was chaos figuring out how to get to our final destination. Customer service throwing us into nowhere on the phone- all while we have 2 small kids on us. It will take the whole vacation to recover from this experience. I am scared how the return flight will go in August. Check-in staff (not sure if they are airport hires or iberia hires- beyond rude, especially in Madrid.) On-plane staff, food and entertainment were good.

I didn't expect food on this flight but they give us breakfast, they also check in our hand baggage for free

We didn't get the coffee with breakfast in the morning.. 30 mins lazer I asked flight attendant why don't we get coffee now at least.. after the breakfast..she said that captain announced possible turbulences fee minutes ago, which didn't ecplain why we didn't get it with the breakfast..breakfast was very poor btw..just little pastry which you can eat in 4 little bites. Turbulences fortunately didn't even happen.. but we didn't get that more than necessary coffee in the morning after the night flight with very poor sleep.. They just served breakfast 1 hour afzer we took off..at like 11 PM.. that doesn't make sense at all.. Also, flight attendants weren't very nice..they looked like they're not happy with their job.. :/

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.

Flight was 1.5 hours late to depart so changed flights to Swiss Air.

Entertainment was good. Food was mediocre. Service was mediocre. New plane was smooth

Staff was great. Space in bathrooms was very good. Boarding went smoothly due to aisles. I would like more room in coach. 2 more inches would be helpful. Lost luggage was a big issue; more on the administrative side than flight related, but diminished the flight experience.

Flight was cancelled and I got rebooked with anther airline. Also had booked a direct flight and got a layover.

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

The seats are designed for 12 years old, but pretty uncomfortable for the average adulte!!

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...

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

Everything you need to know for your flight from Boston to Bilbao

Information on your arrival and departure airports