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Bilbao

$371+ Cheap flights from Boston (BOS) to Bilbao (BIO)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/11. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — BIO
Nov 13 — Nov 201
Thu 11/13
Thu 11/20
1 adult, Economy
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Cheapflights Tip: The best prices from Boston Logan Intl to Bilbao are usually found in October or February, booked 57 days in advance, depart on a Sunday or Wednesday and return on a Wednesday

Cheap flight deals from Boston to Bilbao

Discover tips and strategies to find the most affordable flight options for your journey from Boston (BOS) to Bilbao (BIO). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated October 14, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$361
(KAYAK)

Popular in

April

Cheapest in

October

Average price

$547
Provider with most accurate pricing for Boston Logan Intl-Bilbao flight deals.
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Provider most trusted by Cheapflights users for Boston Logan Intl-Bilbao flights.
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From Boston Logan Intl to Bilbao
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Highest demand for flights based on searches. 7% potential increase in price ($54 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($13 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Find flight deals from Boston to Bilbao

Cheapest flights from Boston to Bilbao
Explore the most affordable flight options available from Boston to Bilbao. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 14, 2025.

This United deal was found by Cheapflights users on 10/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/118:40 pmBOS - BIO
1 stop19h 15mMultiple Airlines
Tue 11/187:40 amBIO - BOS
1 stop16h 55mMultiple Airlines
Deal found 10/12$371
This KAYAK deal was found by Cheapflights users on 10/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/2710:50 pmBOS - BIO
1 stop17h 05mSWISS
Thu 11/611:35 amBIO - BOS
2 stops38h 45mSWISS
Deal found 10/12$379
This KAYAK deal was found by Cheapflights users on 10/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/2710:50 pmBOS - BIO
1 stop17h 05mSWISS
Wed 11/59:50 amBIO - BOS
1 stop16h 30mSWISS
Deal found 10/12$382
This Lufthansa deal was found by Cheapflights users on 10/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/48:40 pmBOS - BIO
1 stop19h 15mLufthansa
Thu 11/137:40 amBIO - BOS
1 stop16h 55mLufthansa
Deal found 10/12$383
This Finnair deal was found by Cheapflights users on 10/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/114:10 pmBOS - BIO
2 stops25h 05mMultiple Airlines
Fri 11/216:45 amBIO - BOS
1 stop14h 30mMultiple Airlines
Deal found 10/14$384
This KAYAK deal was found by Cheapflights users on 10/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/48:40 pmBOS - BIO
1 stop19h 15mLufthansa
Fri 11/147:25 amBIO - BOS
1 stop17h 10mLufthansa
Deal found 10/12$388
This Air Canada deal was found by Cheapflights users on 10/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/113:40 pmBOS - BIO
2 stops15h 10mAir Canada
Tue 11/186:45 amBIO - BOS
2 stops21h 52mAir Canada
Deal found 10/12$390
This KAYAK deal was found by Cheapflights users on 10/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/297:38 pmBOS - BIO
2 stops21h 17mLufthansa
Thu 11/67:40 amBIO - BOS
1 stop16h 55mLufthansa
Deal found 10/12$392
This Air Canada deal was found by Cheapflights users on 10/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/116:40 pmBOS - BIO
2 stops39h 30mAir Canada
Fri 11/217:25 amBIO - BOS
2 stops38h 32mAir Canada
Deal found 10/14$394
This Delta deal was found by Cheapflights users on 10/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/267:30 pmBOS - BIO
1 stop11h 00mDelta
Thu 11/612:15 pmBIO - BOS
2 stops25h 05mDelta
Deal found 10/12$396

Cheapflights Fare Finder

 
Customize your flight search to find flights from Boston to Bilbao that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated October 14, 2025.
Use the filters below to find and compare flights from Boston to Bilbao that are best for you.

Fly from

Boston

Fly to

Bilbao

Route

Depart

Return

Price

BostonBilbao

BOS - BIO

BOSBIO

Boston Logan Intl

Tue 11/11

8:40 pm-9:55 pm

1 stop19h 15m

Bilbao

Tue 11/18

7:40 am-6:35 pm

1 stop16h 55m

$371

BostonBilbao

BOS - BIO

BOSBIO

Boston Logan Intl

Tue 11/4

8:40 pm-9:55 pm

1 stop19h 15m

Bilbao

Thu 11/13

7:40 am-6:35 pm

1 stop16h 55m

$383

BostonBilbao

BOS - BIO

BOSBIO

Boston Logan Intl

Tue 11/11

4:10 pm-11:15 pm

2 stops25h 05m

Bilbao

Fri 11/21

6:45 am-3:15 pm

1 stop14h 30m

$384

BostonBilbao

BOS - BIO

BOSBIO

Boston Logan Intl

Tue 3/3

8:40 pm-11:05 pm

1 stop20h 25m

Bilbao

Fri 3/20

11:35 am-7:35 pm

1 stop13h 00m

$385

BostonBilbao

BOS - BIO

BOSBIO

Boston Logan Intl

Tue 3/3

8:40 pm-11:05 pm

1 stop20h 25m

Bilbao

Tue 3/17

11:35 am-7:35 pm

1 stop13h 00m

$385

BostonBilbao

BOS - BIO

BOSBIO

Boston Logan Intl

Wed 3/4

8:40 pm-11:05 pm

1 stop20h 25m

Bilbao

Tue 3/17

7:25 am-7:35 pm

1 stop17h 10m

$385

BostonBilbao

BOS - BIO

BOSBIO

Boston Logan Intl

Wed 3/4

8:40 pm-11:05 pm

1 stop20h 25m

Bilbao

Wed 3/18

11:35 am-9:32 am

2 stops26h 57m

$385

BostonBilbao

BOS - BIO

BOSBIO

Boston Logan Intl

Tue 3/3

8:40 pm-11:05 pm

1 stop20h 25m

Bilbao

Wed 3/18

11:35 am-7:35 pm

1 stop13h 00m

$385

BostonBilbao

BOS - BIO

BOSBIO

Boston Logan Intl

Mon 3/2

6:30 pm-5:20 pm

1 stop16h 50m

Bilbao

Fri 3/20

11:55 am-7:55 pm

1 stop13h 00m

$387

BostonBilbao

BOS - BIO

BOSBIO

Boston Logan Intl

Mon 3/2

6:30 pm-11:30 am

1 stop11h 00m

Bilbao

Wed 3/18

11:55 am-2:20 pm

1 stop31h 25m

$387

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/12

Showing 1-10 of 14 results
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Compare providers for flights from Boston to Bilbao

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Boston to Bilbao in October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*2 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Boston-Bilbao flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Boston-Bilbao flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Boston-Bilbao flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Boston-Bilbao flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Boston-Bilbao flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Boston to Bilbao

Have a flexible travel schedule? Discover the best time to fly to Bilbao from Boston with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

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

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

Use this chart to determine the optimal time to book a round-trip flight from Boston to Bilbao. Price data was last updated on October 10, 2025.

The price you pay for your flight from Boston to Bilbao may vary depending on when you book. For the best chance of a lower fare, look to book 57 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from Boston to Bilbao?

Currently, October is the cheapest month in which you can book a flight from Boston to Bilbao (average of $359). Flying from Boston to Bilbao in January is currently the most expensive (average of $616). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from BOS to BIO?

Find hourly flight availability from Boston to Bilbao. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 14, 2025.

It’s typically best to fly out from Boston to Bilbao in the morning. Doing so could potentially save you 19% on the flight price compared to flying in the afternoon, which is usually more expensive.

Reviews of airlines servicing Bilbao

Get insights into the airlines that provide service to Bilbao. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Bilbao. Reviews last updated October 14, 2025.
Read through reviews of airlines operating flights from Boston to Bilbao, such as Delta, KLM, and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,972 reviews

Comfort

7.9

Boarding

8.2

Crew

8.5

Overall

8.0

Entertainment

7.9

Food

7.3

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Delta
8.0
Very good
7,972 reviews
Delta
8.0
Very good
7,972 reviews

Comfort

7.9

Boarding

8.2

Crew

8.5

Overall

8.0

Entertainment

7.9

Food

7.3

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
KLM
7.7
Good
1,402 reviews
Delta
8.0
Very good
7,972 reviews

Comfort

7.9

Boarding

8.2

Crew

8.5

Overall

8.0

Entertainment

7.9

Food

7.3

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
United Airlines
7.4
Good
8,975 reviews
Delta
8.0
Very good
7,972 reviews

Comfort

7.9

Boarding

8.2

Crew

8.5

Overall

8.0

Entertainment

7.9

Food

7.3

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Iberia
7.0
Good
2,988 reviews
Delta
8.0
Very good
7,972 reviews

Comfort

7.9

Boarding

8.2

Crew

8.5

Overall

8.0

Entertainment

7.9

Food

7.3

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Lufthansa
6.8
Okay
7,485 reviews
Delta
8.0
Very good
7,972 reviews

Comfort

7.9

Boarding

8.2

Crew

8.5

Overall

8.0

Entertainment

7.9

Food

7.3

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.

Related info for your journey

Find useful and relevant information for your journey from Boston to Bilbao. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Boston to Bilbao?

    A quick flight from Boston to Bilbao can take about 19h 15m. Lufthansa provides one of the quickest options available for as low as $383. There are 3348 mi between Boston and Bilbao. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines flying from Boston to Bilbao round-trip?

    According to our current data, Iberia ($395), Delta ($424), and American Airlines ($439) offers the cheapest pricing from Boston to Bilbao. Iberia is 41% cheaper than the average price of flights available within the next 90 days to this destination.

  • Can I find deals for flights from Boston to Bilbao that include hotel bookings?

    Yes. In addition to deals on Boston to Bilbao flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Boston to Bilbao?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Boston to Bilbao.

  • Can I find deals for business class flights from Boston to Bilbao?

    Yes. Cheapflights offers flight deals from Boston to Bilbao by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Boston to Bilbao?

    Currently, October is the cheapest month in which you can book a flight from Boston to Bilbao (average of $359). Flying from Boston to Bilbao in January is currently the most expensive (average of $616). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Boston to Bilbao

See prices for flight routes from nearby airports that may be better suited for you.
Boston to San Sebastian flights
Hartford to Bilbao flights

Top 8 airlines flying from Boston to Bilbao

Discover the top 8 airlines that operate flights from Boston to Bilbao. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated October 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
IberiaCheapest$395Average$668FlexibilityNo cancel feeOn-time77%
DeltaCheapest$424Average$779FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$439Average$657FlexibilityNo cancel feeOn-time71%
TAP AIR PORTUGALCheapest$471Average$647FlexibilityNo cancel feeOn-timeN/A
LufthansaCheapest$483Average$764FlexibilityNo cancel feeOn-time76%
LEVELCheapest$489Average$753FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$499Average$712FlexibilityNo cancel feeOn-time69%
KLMCheapest$532Average$891FlexibilityNo cancel feeOn-time75%

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