BOS - BIO

$355 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 8/10. 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.
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 21% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Everything you should know

Cheapest round-trip
$776
Typical prices: $482-$1,034
Multiple Airlines
Fri 10/9Thu 10/22
BOS - BIO • 2 stops
Cheapest one-way
$355
Typical prices: $373-$528
Multiple Airlines
Mon 8/10
BOS - BIO • 3 stops
Top airlines
Cheapest • from $778 (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 38m (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
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

Fri, Oct 9 - Thu, Oct 22
Multiple Airlines Logo
8:50 pm - 9:00 pm
BOS
-
BIO
18h 10m
2 stops
Multiple Airlines Logo
11:05 am - 9:05 pm
BIO
-
BOS
16h 00m
1 stop
$776Multiple Airlines
Fri, Sep 4 - Sun, Sep 13
KLM Logo
5:10 pm - 9:50 am
BOS
-
BIO
10h 40m
1 stop
KLM Logo
8:20 am - 4:35 pm
BIO
-
BOS
14h 15m
1 stop
$778KLM
Wed, Aug 12 - Wed, Aug 19
Delta Logo
12:25 pm - 11:15 am
BOS
-
BIO
16h 50m
2 stops
Delta Logo
6:45 am - 4:13 pm
BIO
-
BOS
15h 28m
2 stops
$779Delta
Mon, Sep 21 - Fri, Oct 9
Multiple Airlines Logo
11:00 pm - 11:00 pm
BOS
-
BIO
18h 00m
3 stops
Multiple Airlines Logo
10:50 pm - 8:20 pm
BIO
-
BOS
27h 30m
3 stops
$782Multiple Airlines
Fri, Sep 25 - Sat, Oct 10
Multiple Airlines Logo
8:50 pm - 9:00 pm
BOS
-
BIO
18h 10m
2 stops
Multiple Airlines Logo
7:15 pm - 9:45 pm
BIO
-
BOS
32h 30m
1 stop
$784Multiple Airlines
Sat, Sep 26 - Sun, Oct 11
Multiple Airlines Logo
11:00 pm - 4:05 pm
BOS
-
BIO
35h 05m
2 stops
Multiple Airlines Logo
2:25 pm - 9:45 pm
BIO
-
BOS
13h 20m
1 stop
$786Multiple Airlines
Sun, Aug 30 - Sat, Sep 12
TAP AIR PORTUGAL Logo
6:05 pm - 11:40 am
BOS
-
BIO
11h 35m
1 stop
TAP AIR PORTUGAL Logo
6:35 pm - 2:40 pm
BIO
-
BOS
26h 05m
1 stop
$787TAP AIR PORTUGAL
Thu, Sep 3 - Sat, Sep 12
Delta Logo
9:45 pm - 5:30 pm
BOS
-
BIO
13h 45m
1 stop
Delta Logo
6:45 am - 1:19 pm
BIO
-
BOS
12h 34m
1 stop
$788Delta
Sat, Aug 22 - Sat, Sep 5
Iberia Logo
11:55 am - 8:30 am
BOS
-
BIO
14h 35m
2 stops
Iberia Logo
9:35 pm - 7:45 pm
BIO
-
BOS
28h 10m
1 stop
$790Iberia
Fri, Sep 25 - Sun, Oct 11
Multiple Airlines Logo
8:50 pm - 9:00 pm
BOS
-
BIO
18h 10m
2 stops
Multiple Airlines Logo
2:25 pm - 9:45 pm
BIO
-
BOS
13h 20m
1 stop
$791Multiple 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 October.

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 $1,066 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 4 weeks before departure.

Good to know

Low seasonFebruary
Cheapest flight$355
Best time to beat the crowds with an average 18% drop in price.
Most popular time to fly with an average 46% 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 $355 for a one-way ticket and $776 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, 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 $980 and an overall rating of 7.8, Delta is the most popular choice. KLM is also a great choice for the route, with an average price of $843 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 1530 reviews
7.7Comfort
7.2Entertainment
7.8Boarding
8.4Crew
7.3Food
Airline reviews

Brand new plane lots of room the snack was very flavourful and enjoyable

10.0 ExcellentBob, May 2026
MAD - AMS
Read more KLM reviews

Brand new plane lots of room the snack was very flavourful and enjoyable

As per usual when you Hit the UK it's a slow process through customs Not as efficient at Thailand for sure

The flight was delayed. The aircraft was unclean. Promised seat was not given due to change in Aircraft. Not one crew on ground was in a position to give any response. Amsterdam Airport is AVIODABLE Over crowded. Over Expensive. Poor Services.

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

Crew is not the cheerful type. very slow meal service (this is their style as have flown this many times)

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

At the airport, terrible, I do not want to even remember it. It was too humiliating for a business class passenger.

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.

Third flight in two months where the crew was not there. Comfort seating does not guarantee overhead bin space. Passengers with children are allowed on the plane first - if you are flying to and from Orlando, this means half the plane has boarded before you get on. And somehow all the bin space is taken up. 3 out of 5 flights have had issues with equipment or procedure. Some of these instances caused the flight to be delayed because of a "nuisance" light. One time it was a bag that had been brought on board but did not belong to anyone so we had to return to the gate. Last night we were told the "AC" on the plane doesn't work well and we're 10th for take off- because the crew was late - and that it will get cool when we're in the air. Not sure if this is usual, but I didn't think flight crew could jump seat in first class. Movie and TV selection has not been refreshed for several months- flying one to two round trips each month easily exhausts the list of content.

Great experience nice pilot very soft and easy landing and take off

We sat on the runway for over an hour before departure. That was unwelcome.

Horrible. Faucet in sink not working, wifi not working. Didn’t bring food or snacks

Flight was delayed before take off and at landing. Baggage took 20 minutes. Flight crew would not serve full soft drink and had to ask multiple times before receiving water.

From checking to boarding, it was a seamless experience. The service agents were so helpful. The flight crew was so pleasant.

Gate agent showed up 20 minutes before boarding and was not at all friendly. Had to take this flight due to the one on the day before being cancelled and any later options were already full with long standby lists. Despite having paid for Delta Comfort seats, Delta did not allow me (or anyone) to choose their seat. The agent assigned them for everyone just prior to boarding. Self seat selection was allowed on the original flight. Flight staff was great - very friendly.

Flight attendants were great. Cheerful, upbeat and friendly. Jet, in particular, was fantastic.

I have Precheck. Flew HPN to DEN and return this past weekend. Delta didn't attach my Precheck number to this trip. So it was waiting in general line especially in Denver. Unavailable.

Original flight was delayed, then cancelled and the gate staff did not expedite rebooking. Also, no instructions were given that a ticket number was needed before being called to facilitate rebooking. This could have been much more organized.

They delayed the flight 3 hours because it wasn't full they moved us to 5 different gates probably the worst airline ever not even spirit is this bad.

Very easy ! Use the kiosk and bag drop and right to security within 10 min

Checking bag at terminal was horrible. No agents to check us in and only 1 kiosk working. Boarding went ok. Crew onboard was very scattered rained. Missed our row while serving and then didn’t see them hardly again.

Crew was amazing, takeoff wonderful. The bathroom was disgusting from before takeoff the odor made the flight uncomfortable as you could smell the bathroom from the center of the plane where we were sitting. Smelled like raw sewage. My daughter was throwing up as we landed due to the smell and horrible turbulence as we approached Newark.

Airline tickets are not cheap. You expect reliable competent service. Thanks to canceled flights and botched transfers we arrived at our destination two days late. This is not acceptable

Horrible! Several delays and then was cancelled! I spent over 24 hours in the airport and was unable to get a hotel or food voucher.

The entertainment they offer could use some games, and maybe they could add some cookies to the snack menu. And the automated messages are a bit repetitive. But it was comfortable temperature wise and the seats were comfortable. The crew is very polite and helpful

The entertainment is a bit limited, it would be better if they added some games to play besides the movies and tv shows. But the seats are comfortable and the crew is polite

This planes staff was top tier. Everything went great and had a great flight home.

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.

Terrible boarding procedures in Madrid. The airplane barely has any legroom and I am 68 inches.

Not bad but they lost 2 of my bags when I got to Florence

Couldn’t get boarding passes online, delayed an hour, and smallest amount of space on board I’ve ever encountered for such a long flight.

I’m an Iberia fan but this time They dropped the ball. I went from ALC to MAD to LHR. Boarding in ALC was by group… to get you in a bus. Then we sat for almost an hour when most people had connections. When we landed in Madrid we did so and they put us in another bus almost like if they wanted to make people lose their connection. We made ours by the skin of our teeth but our luggage did not. And on top of this we had to listen to the pilot bragging about Iberia being punctual. To be true we made it on time to LHR but we are Still waiting for our luggage

I have to compare it to the AA flight back home. AA was a little better. Perhaps it was that American English is my native tongue. My seat on AA was newer and more comfortable. The food was a little better. The entertainment was much better, more movies worth watching. The sound was lousy on both.

Excellent liked business class except wife’s luggage was lost on 10 Hours connecting flight to Miami and we were priority! 1:20 layover! Expect better From American Airlines partner

Service was good , communication and emails were in Spanish though I booked in English , end up figuring it out but also flight was partnered with air maroc and I had to call them to check on not Iberea doesn’t make sense

In general, I've had excellent experiences with Iberia flights and will continue to use them. In this last flight there were two things that didn't go right. I didn't get the kosher meal I had pre-requested when I had checked in on-line. Things worked out OK as we ended up eating the fish and vegetarian choices, which were really good. The other issue was that some movies for me and my wife started fine but after 8-12 minutes the content just switched to something else. The flight attendant reset our entertainment systems, but the problem persisted. We ended up choosing other movies/TV shows that did work fine.

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

The flight was cancelled, so why are you asking me how the flight was?

We sat in our seats on the tarmac for almost 3 hours due to storms. They would not give us water or a snack. We were to depart at 7.30 pm and it was about 10.30 when we took off. No dinner until much after that. Beef type noodle dish was terrible with about a teaspoon of beef in it. The breakfast sweet waffle with egg and sausage inside was horrible. An English muffin sandwich would have been much better. Food was the worst in all of our years of traveling the world.

Our screen kept turning off ...3 times...had to get crew attention to turn it on again

They messed up my seat so I didn’t get the one I paid for

Put me on standby; flight was late; missed my connecting flight; disaster

Flight attendants were fine, seats a bit hard but I use a cushion for extra support. The only issue was it was a bit too cool and I needed to ask for and received and extra blanket. I survived!!!

Very few things and/or people are excellent. It was very good.

Extremely uncomfortable seats. Experience was like a Frontier Airlines flight. Would not fly it again.

Very, very tight legroom. They must’ve jammed in an additional few rows of seat seating. Denver to Munich was the least legroom I’ve ever had on any flight, let alone a multi hour international journey. I will not take that flight again.

In my first flight with Air Canada we sat in the plane for 4:00pm to 6:30pm. Finally we were asked to get off the plane and we were told the flight was cancelled after 7:00pm There was o clear explanation of what was the problem. I was booked without my permission on a Delta Flight at 7:30pm that was leaving at 8:00pm and I still had to go get my luggage(my final destination was Rome with one stop in Toronto. The luggage claim for Canada was closed so had to return to finally get it on the luggage belt.. Of course I missed the Delta flight and all the next day flights were booked. I also lost what I paid for my stay in Rome because I did nt cancel in time. A complete nightmare.

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

Information on your arrival and departure airports