BOS - BIO

$261 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 4/23. 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
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
$523
Overall average: $597
TAP AIR PORTUGAL
Mon 4/27Tue 5/12
BOS - BIO • 1 stop
Cheapest one-way
$261
Typical prices: $664-$665
Multiple Airlines
Thu 4/23
BOS - BIO • 3 stops
Top airlines
Cheapest • from $523 (round-trip)
Best reviews • 7.9 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 $703 (round-trip)
Shortest trip • 9h 46m (one-way)
Insights
Insights
Insights
Insights
When to book
in advance
Our data shows that travelers who book at least 3 weeks in advance save around 16% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 24% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
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, Apr 27 - Tue, May 12
TAP AIR PORTUGAL Logo
10:45 pm - 6:00 pm
BOS
-
BIO
13h 15m
1 stop
TAP AIR PORTUGAL Logo
6:50 pm - 2:45 pm
BIO
-
BOS
25h 55m
1 stop
$523TAP AIR PORTUGAL
Wed, Apr 22 - Tue, May 5
TAP AIR PORTUGAL Logo
11:15 pm - 11:30 am
BOS
-
BIO
30h 15m
2 stops
TAP AIR PORTUGAL Logo
6:50 pm - 8:20 pm
BIO
-
BOS
31h 30m
1 stop
$526TAP AIR PORTUGAL
Wed, Apr 22 - Mon, May 4
Multiple Airlines Logo
8:05 pm - 11:25 pm
BOS
-
BIO
21h 20m
1 stop
Multiple Airlines Logo
7:25 pm - 3:10 pm
BIO
-
BOS
25h 45m
1 stop
$552Multiple Airlines
Wed, Apr 8 - Wed, Apr 29
United Airlines Logo
8:05 pm - 11:25 pm
BOS
-
BIO
21h 20m
1 stop
United Airlines Logo
7:15 am - 5:40 pm
BIO
-
BOS
16h 25m
1 stop
$556United Airlines
Mon, May 4 - Mon, May 11
SWISS Logo
9:40 pm - 8:05 pm
BOS
-
BIO
16h 25m
1 stop
SWISS Logo
7:25 pm - 3:10 pm
BIO
-
BOS
25h 45m
1 stop
$560SWISS
Wed, Apr 8 - Wed, Apr 29
United Airlines Logo
9:30 am - 11:25 pm
BOS
-
BIO
31h 55m
2 stops
United Airlines Logo
11:55 am - 5:40 pm
BIO
-
BOS
11h 45m
1 stop
$561United Airlines
Sun, Sep 20 - Tue, Sep 29
United Airlines Logo
8:05 pm - 11:25 pm
BOS
-
BIO
21h 20m
1 stop
United Airlines Logo
6:50 am - 8:10 pm
BIO
-
BOS
19h 20m
1 stop
$565United Airlines
Sun, Sep 20 - Mon, Sep 28
Lufthansa Logo
8:05 pm - 11:25 pm
BOS
-
BIO
21h 20m
1 stop
Lufthansa Logo
6:40 pm - 5:40 pm
BIO
-
BOS
29h 00m
1 stop
$567Lufthansa
Tue, May 5 - Tue, May 12
Lufthansa Logo
5:45 pm - 1:20 pm
BOS
-
BIO
13h 35m
1 stop
Lufthansa Logo
11:55 am - 5:40 pm
BIO
-
BOS
11h 45m
1 stop
$568Lufthansa
Sun, Sep 6 - Wed, Sep 16
United Airlines Logo
8:05 pm - 11:25 pm
BOS
-
BIO
21h 20m
1 stop
United Airlines Logo
12:30 pm - 7:28 pm
BIO
-
BOS
12h 58m
1 stop
$570United 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.

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 October, where tickets cost $483 (return) on average. On the other hand, the most expensive months are May and July, where the average cost of round-trip tickets is $790 and $771 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 3 weeks before departure, which saves you about 16% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 13 weeks before departure.

Good to know

Low seasonFebruary
Cheapest flight$261
Best time to beat the crowds with an average 5% drop in price.
Most popular time to fly with an average 21% 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 3 days, the lowest price for a flight from Boston to Bilbao was $261 for a one-way ticket and $523 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?

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

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

    The two airlines most popular with KAYAK users for flights from Boston to Bilbao are Delta and KLM. With an average price for the route of $751 and an overall rating of 7.9, Delta is the most popular choice. KLM is also a great choice for the route, with an average price of $707 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.
7.9
DeltaOverall score based on 8328 reviews
8.1Boarding
7.8Entertainment
8.5Crew
7.2Food
7.9Comfort
Airline reviews

The cabin temperature was nice and cool. The wifi was not working.

8.0 ExcellentMatt, Mar 2026
SEA - SJC
Read more Delta reviews

The cabin temperature was nice and cool. The wifi was not working.

Flight late, the waited for a long time for “personal” to arrive at gate to dock the plane in Rochester. So annoying. This flight was expected, why aren’t personel available for the jet bridge?

As previously noted, this flight was great: departure was timely, the crew was friendly and attentive, and wifi connectivity was seamless. In particular, I appreciated that the flight attendant just told me to stow the laptop right before takeoff/landing, and trusted me to do so (which I did!).

Kayak botched up the booking, i had to call delta and fix. In the process Delta failed to honor my comfort plus seat assignment that i had previously.

Entertainment is ok! Boarding and seat with zone is terrible. I paid for the seats but you didn’t give me what I paid for which is exit isles.

the crew cancel the morning service due to the weather. Then the flight got deverted to Nashville . we were on the ground for over two hours the only gave us water once... no food or any snacks.... the crew should have handled better and offered something to passengers.

My recent experience was excellent on Delta! I flew with Delta Comfort and I was really comfortable in my seat. I enjoyed the in-flight service. The flight attendants were so friendly and hospitable. I love the snack on the flight as well. This was my first time flying on Delta and I will definitely consider flying with them again.

My flight was cencaled due with the bad weather on Sunday the crew was poorly mistaken my luggage supposed depart with my flight instead I didn’t have my luggage for almost 3 days the website is poorly respond to my complain until I have someone to do it my connection smooth their not even respon or email me even the have my luggage

Delta needs to step its game up get a more reliable internet service. Internet service was non-existent for this flight.

Mechanical Delay of over an hour with multiple gate changes. Entertainment system down for rejuvenation.

It was really nice journey i personally recommend klm flight

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

Terrible last row seats many seats available but no offer to move to better seat

Delay on my previous leg, had to run to catch my flight. But that happens. Overall ok.

Flight was ok but lack of communication cost me to literally beg to be put on another flight as connecting flight had departed

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.

Couldn’t get boarding pass in SLC even with help from a redcoat, so had to find a desk in AMS to get boarding pass. Technical problems so not sure why. Very inconvenient. The KLM app is not as user friendly as most apps. Also had to wait almost an hour on the tarmac for a fuel truck, which caused us to miss a connecting bus in LUX.

The immigration hall in Amsterdam was understaffed, so passport checking was slower than it should be for a major airport. They need to get the automatic readers up and running for non EU passport holders. Waiting in line after a long flight feels a bit abusive.

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.

First of all we couldn’t check in online, then we learn at the airport we were on stand by for KLM’s mistake of overbooking. The seats were not comfy at all. Our luggage got lost.

I will never fly ANA again. They lost one of my large pieces of checked luggage, the heaviest one with the most valuable items in it, and they said they will not send me an email unless they can't find it, even though the paper they gave me to track the status of my lost luggage requires a code from an email they are supposed to send me so I can do baggage tracing. They claim to be an international airline, but they also insist on calling a Japanese telephone number to confirm where to send the lost baggage if they find it. It is impossible to find an actual contact email address for customer support on their website, and their AI chatbot is unhelpful, directing you to a webpage that says it is for contact information but does not have any actual email addresses or phone numbers listed on it. My seat in economy did not recline at all, even though I was not sitting in an exit row nor the very back row. I had to sit in the fully upright position for over ten hours of international travel. Awful experience overall.

No seat back entertainment. And app had a hard time getting entertainment loaded.

ticket agent lady wás very helpful , she arranged wheel chair for my elderly mother

Didn't make the flight because the first leg of my flight was canceled and the next leg was already booked.

My flight was canceled a few hours before boarding. I was rebooked on Copa airlines and missed an important meeting .

Good quick flight on a small but comfortable plane. I'm 6'3 and had plenty of space.

Experience was great - no complaints. Took off on time, landed early. Got to the gate relatively quickly - took a little bit of extra time to deplane but nothing excessive.

Business class seats felt very cramped compared to other airlines.

Economy plus was so cramped I could not use my laptop. It was beyond bad.

OK, we were delayed and had to de plane and reboard.

Awful. They didn't even show concern that her connecting flight( Dallas to Mardrid) was gone/missing. I don't understand how that is even possible. Rudest answer from one of the crew was that American Airlines sold the tickets to somebody else. My daughter was not in the list.

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

Excellent lie flat seat for premium economy! Great staff. Bad food . Not so great entertainment. My bag didn’t make it either.

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

The pilot was professional and very good. The flight crew, very young and often looked flustered and overwhelmed. The seats were among the most uncomfortable in the air. The boarding somewhat chaotic. The price reasonable. Overall it was an average budget airline experience...although Iberia is not a budget airline. I fear if Iberia doesn't up it's game customers like us will go elsewhere.

Bad weather Excelent pilot Spoke British 😆on time seats small ad expected in a discount airline

It wasn’t great because the third-party from Kayak there was just no information about how to check in with Vueling. And the purchase of the ticket from under pricer just made everything really difficult. I’m unlikely to use Kayak again for these reasons.

It was fine, older plane with limited entertainment, otherwise fine.

the seats were bad and uncomfortable and the food was not tasty.

the seats were so cramped you could barely move. it was difficult to eat when passengers would recline their seats. the seats were so flimsy and unstable that whenever someone got in and out of their seat, it bounced like a spring back in your face. the movies were nice. the food was terrible. even though the conditions were terrible, they tried to pressure passengers to relocate their seats to accommodate adults who were related and wanted to sit next to each other, even after the passengers expressed that they did not want to move for that purpose. on the connecting flight, the “service” consisted of items for purchase. even though the flight was only 45 minutes, once again passengers (including me) were pressured to relocate for people to sit next to each other. they couldn’t be apart for 45 minutes? this was much less compelling than being apart for an 8 hour flight.

Lufthansa cancelled our flight from Los Angeles to Naples Italy on March 10 for scheduled flight on March 12 Very stressful experience trying to arrange alternatives. Will never fly again with Lufthansa

Everything could have been better. What needed to be wrong with United went wrong

The staff was bit rude when I asked for an extra drink after one beer, asked for one wine glass.

Very good, i got two seats for myself, and was comfortable with the blanket i got

I hated the FRA Airport. Confusing signage, including the path to Immigration and Security It seems that the airport grew haphazardly over the years. I have been through multiple WW Hubs with much better experiences.

Economy Priority seats are extremely uncomfortable. There is no way to escape the boxed in feeling, particularely because the distance between to rows are too short, the hard edge of the front row is keeping legs confined. There is no elevated place to put your feet. I am of average, European size.

Terrible. Both flights were significantly delayed, no luggage, made me check my small bag when many, many others had much larger carry-ons, not even a bottle of water . . . I will not fly Discover Airlines again.

I was deceived on the Kayak site expecting a ticket, but instead finding a "standby" reservation. When I tried to change the ticket, I paid almost twice the price of the original ticket. Then, the airline refused to give me the reserved seat I had chosen and paid for. I think I deserve a refund for this leg of my trip because I was doubly charged and did not receive what I had paid for. I put in a complaint with Lufthansa because the ticket was sold originally sold as a flight they listed. Someone here needs to take responsibility.

Excellent service; they helped me reschedule so I can fly in an earlier flight

I had a good comfortable seat. There was nearly an hour delay. There was an accident with the champagne, but I was well compensated. These things happen sometimes.

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

Information on your arrival and departure airports