BOS - BIO

$302 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 8/2. 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
$681
Typical prices: $1,040-$680
Scandinavian Airlines
Sun 5/17Wed 5/20
BOS - BIO • 1 stop
Cheapest one-way
$302
Typical prices: $373-$552
Iberia
Sun 8/2
BOS - BIO • 1 stop
Top airlines
Cheapest • from $681 (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 23% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 29% 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

Sun, May 17 - Wed, May 20
Scandinavian Airlines Logo
5:40 pm - 11:35 am
BOS
-
BIO
11h 55m
1 stop
Scandinavian Airlines Logo
7:35 pm - 3:35 pm
BIO
-
BOS
26h 00m
1 stop
$681Scandinavian Airlines
Sun, Sep 13 - Fri, Sep 18
Multiple Airlines Logo
8:50 pm - 6:45 pm
BOS
-
BIO
15h 55m
2 stops
Multiple Airlines Logo
7:00 am - 9:45 pm
BIO
-
BOS
20h 45m
2 stops
$687Multiple Airlines
Sat, May 9 - Tue, May 26
Lufthansa Logo
8:05 pm - 11:25 pm
BOS
-
BIO
21h 20m
1 stop
Lufthansa Logo
7:15 am - 5:40 pm
BIO
-
BOS
16h 25m
1 stop
$688Lufthansa
Thu, Sep 3 - Wed, Sep 9
United Airlines Logo
8:05 pm - 11:25 pm
BOS
-
BIO
21h 20m
1 stop
United Airlines Logo
12:30 pm - 9:23 am
BIO
-
BOS
26h 53m
2 stops
$690United Airlines
Tue, Jul 28 - Wed, Aug 12
KLM Logo
5:20 pm - 3:55 pm
BOS
-
BIO
16h 35m
1 stop
KLM Logo
8:20 am - 4:31 pm
BIO
-
BOS
14h 11m
1 stop
$695KLM
Sat, May 9 - Tue, May 26
Multiple Airlines Logo
5:10 am - 1:25 pm
BOS
-
BIO
26h 15m
2 stops
Multiple Airlines Logo
8:55 pm - 7:55 pm
BIO
-
BOS
29h 00m
1 stop
$696Multiple Airlines
Wed, Jul 29 - Wed, Aug 12
American Airlines Logo
11:20 am - 8:30 am
BOS
-
BIO
15h 10m
2 stops
American Airlines Logo
6:45 am - 4:10 pm
BIO
-
BOS
15h 25m
1 stop
$699American Airlines
Thu, Sep 3 - Wed, Sep 9
United Airlines Logo
5:45 am - 5:55 pm
BOS
-
BIO
30h 10m
2 stops
United Airlines Logo
12:30 pm - 9:23 am
BIO
-
BOS
26h 53m
2 stops
$700United Airlines
Sun, Sep 13 - Fri, Sep 18
Iberia Logo
11:50 pm - 4:25 pm
BOS
-
BIO
10h 35m
1 stop
Iberia Logo
6:45 am - 4:10 pm
BIO
-
BOS
15h 25m
1 stop
$702Iberia
Mon, May 25 - Thu, Jun 4
Multiple Airlines Logo
4:45 pm - 11:00 pm
BOS
-
BIO
24h 15m
3 stops
Multiple Airlines Logo
6:05 pm - 2:45 pm
BIO
-
BOS
26h 40m
2 stops
$705Multiple 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 May.

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 $482 (return) on average. On the other hand, the most expensive months are July and April, where the average cost of round-trip tickets is $1,028 and $863 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 23% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 9 weeks before departure.

Good to know

Low seasonFebruary
Cheapest flight$302
Best time to beat the crowds with an average 12% drop in price.
Most popular time to fly with an average 50% 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 $302 for a one-way ticket and $681 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, SkyTeam, and oneworld 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 $966 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 $771 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 8431 reviews
8.1Boarding
7.2Food
8.5Crew
7.9Comfort
7.8Entertainment
Airline reviews

Everything was great. The only issue is unfixable. Seats are too small. 😁🤪

10.0 ExcellentAnonymous, Apr 2026
ATL - AMS
Read more Delta reviews

Everything was great. The only issue is unfixable. Seats are too small. 😁🤪

This wasn't my experience with Delta. It was just the Pegasus flight. Seats were very hard. Staff was kinda rough. Not very nice. Charged me for snacks. For a 4 hour flight I would've expected more.

Crew was nice, meal was good. Entertainment had to be rebooted 3 times and still did not work. Turns out there was residue on screen, it needed to be cleaned to prevent the touchscreen buttons from continuously activating. I had entertainment for the last 45 minutes of a 5 hour 45 minute flight. Really unacceptable for first class. Flight attendent indicated your cleaning solution creates this problem. Seems as if this is widely known, you should be using a different product or cleaning better. Really really disappointing which simply added to the wi fi on your planes with reliably never ever works.

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.

Everything went smoothly, although the usual gripes about airline travel were still present: the boarding process is inefficient, the snack selection is limited, and so on. Since there was extra space on the flight, the gate agent rearranged many people's seats to put people on the aisles and windows, leaving the middle seats empty, as much as possible, which was pretty great.

Landed without a gate ready. Plane is extremely old and dirty.

All the amenities was wonderful, if they could keep their prices that low. I'd fly with them all the time.

Very old plane with no inflight entertainment. I purchased the internet pass and it was nearly unusable.

My tray was broken so i had no place to work or eat except my lap. Flight attendant said I would get an email with some credit or miles, it was a complete waste of time as I could only function at about 20% of normal. I have not received anything yet.

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

Empty seats next to me - wish it had been for a longer flight!!

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.

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.

The crew was great. Very friendly and responsive. The plane was old, small and tight. We ran out of overhead space and I had to check. Middle seat was particularly tight.

Flight itself excellent, but delayed so missed connection & got to destination 2 hrs later

The flight crew on this leg of my trip was very friendly and pleasant. Every one of them was humorous, as well as helpful and accommodating. This group was BY FAR the best crew I’ve flown with. They deserve kudos.

boarded early to only find out that flight would sit at gate for 45 min to an hour. Landed in chicago and sat on runway for over an hour before got to gate. Total delay was extensive for a 45 min flight door to door.

The flight was delayed from take off because only one runway was operational in San Francisco.

Several missed and almost missed connections. It felt like everything was being patched together last minute without enough resources and it ended up being an extremely stressful experience that basically ruined our weekend on the west coast. What a waste.

Really hard landing... as in slammed into the runway then hit the brakes really hard ...

The flight was significantly delayed. The inbound flight from EWR was delayed departing because of mechanical problems. My original departure from CLT was 5:28 pm but due to the delay of the inbound flight, after arrival, deplaning, cleaning, boarding, we did not push back from the gate until 9:00 pm. Once in the air, the flight was smooth and what was originally supposed to be an arrival in ORD at 7:30 pm local time turned out to be 9:35 pm.

Putting people that close to the bathroom, where you have to look into the bathroom as people are exiting and entering was not great and the smell was also not great. I know the airlines are desperate for more chairs, but that seat is a crime.

My bags were misplaced!!! Im in a foreign country with no bags

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

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.

Catastrophic experience the gate selected customers were picked up to.pay 70 eur for overweight 1-2 kg. While some others were let to board without chcking their carry on bags. Unecessaey drama by Lufthansa that brings nothing just hating them by customers.

Was never allowed on and not refunded the full amount of the ticket plus charged a $300 processing fee.

Terrible. Lost our luggage for 4 days. Did not advise passengers there was a strike in Barcelona Airport and had zero personnel on hand at airport to advise passengers on where to go to file claims. We had to fend for ourselves. No assistance at all other than an online claims submission process that we had to find out about on our own.

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.

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

Information on your arrival and departure airports