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Bilbao

$338+ 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 1/28. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — BIO
Jan 3 — Jan 101
Sat 1/3
Sat 1/10
1 adult, Economy
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Cheapflights Tip: The best prices from Boston Logan Intl to Bilbao are usually found in September or October, booked 57 days in advance, depart on a Sunday or Wednesday and return on a Wednesday

Cheap 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 December 4, 2025.

This FlightHub deal was found by Cheapflights users on 12/3. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/48:40 pmBOS - BIO
1 stop19h 15mLufthansa
Thu 12/117:40 amBIO - BOS
1 stop16h 55mLufthansa
Deal found 12/3$498
This United Airlines deal was found by Cheapflights users on 12/3. 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 Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/46:00 amBOS - BIO
2 stops30h 05mUnited Airlines
Thu 12/117:40 amBIO - BOS
1 stop16h 55mUnited Airlines
Deal found 12/3$506
This Mytrip deal was found by Cheapflights users on 12/3. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/45:30 amBOS - BIO
3 stops27h 05mMultiple Airlines
Thu 12/119:05 pmBIO - BOS
3 stops28h 37mMultiple Airlines
Deal found 12/3$883
This Ovago deal was found by Cheapflights users on 12/1. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/257:44 pmBOS - BIO
2 stops34h 16mLufthansa
Thu 1/16:50 pmBIO - BOS
2 stops35h 04mLufthansa
Deal found 12/1$1,755
This Air France deal was found by Cheapflights users on 12/1. 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 France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/256:30 pmBOS - BIO
1 stop11h 00mMultiple Airlines
Thu 1/16:50 amBIO - BOS
2 stops15h 10mMultiple Airlines
Deal found 12/1$1,852
This KLM deal was found by Cheapflights users on 12/1. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/256:30 pmBOS - BIO
1 stop16h 50mKLM
Thu 1/17:25 amBIO - BOS
1 stop12h 15mKLM
Deal found 12/1$1,910
This Mytrip deal was found by Cheapflights users on 12/3. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/235:30 amBOS - BIO
3 stops35h 15mMultiple Airlines
Fri 1/29:05 pmBIO - BOS
3 stops30h 58mMultiple Airlines
Deal found 12/3$2,174

Find 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 December 4, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$337
(Iberia)

Popular in

February

Cheapest in

September

Average price

$712
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.
Search Deals
From Boston Logan Intl to Bilbao
Search Deals
High demand for flights, 1% potential price rise
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($12 potential savings vs. average RT price).
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Average for round-trip flights in December 2025
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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 December 4, 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

Wed 1/28

9:20 pm-1:00 pm

1 stop9h 40m

Bilbao

Tue 2/3

11:25 am-8:55 pm

1 stop15h 30m

$338

BostonBilbao

BOS - BIO

BOSBIO

Boston Logan Intl

Wed 1/28

4:45 pm-8:30 am

1 stop9h 45m

Bilbao

Tue 2/3

6:45 am-8:30 pm

2 stops19h 45m

$351

BostonBilbao

BOS - BIO

BOSBIO

Boston Logan Intl

Mon 3/9

7:30 pm-11:30 am

1 stop11h 00m

Bilbao

Wed 3/18

7:25 am-5:20 pm

1 stop14h 55m

$356

BostonBilbao

BOS - BIO

BOSBIO

Boston Logan Intl

Wed 1/28

10:40 am-11:30 am

2 stops18h 50m

Bilbao

Tue 2/3

7:25 am-1:40 pm

1 stop12h 15m

$361

BostonBilbao

BOS - BIO

BOSBIO

Boston Logan Intl

Tue 3/3

6:30 pm-11:30 am

1 stop11h 00m

Bilbao

Tue 3/10

7:25 am-6:27 pm

2 stops16h 02m

$366

BostonBilbao

BOS - BIO

BOSBIO

Boston Logan Intl

Tue 3/10

9:05 am-11:20 am

2 stops21h 15m

Bilbao

Wed 3/18

7:25 am-5:20 pm

1 stop14h 55m

$374

BostonBilbao

BOS - BIO

BOSBIO

Boston Logan Intl

Wed 3/4

1:03 pm-11:20 am

2 stops16h 17m

Bilbao

Wed 3/11

7:25 am-6:27 pm

2 stops16h 02m

$384

BostonBilbao

BOS - BIO

BOSBIO

Boston Logan Intl

Tue 3/10

11:40 pm-2:35 pm

1 stop9h 55m

Bilbao

Mon 3/16

3:05 pm-9:55 pm

1 stop11h 50m

$387

BostonBilbao

BOS - BIO

BOSBIO

Boston Logan Intl

Mon 3/2

2:20 pm-10:50 am

2 stops14h 30m

Bilbao

Wed 3/11

11:35 am-7:35 pm

1 stop13h 00m

$390

BostonBilbao

BOS - BIO

BOSBIO

Boston Logan Intl

Tue 3/10

9:40 pm-9:55 pm

1 stop19h 15m

Bilbao

Mon 3/16

6:50 pm-7:35 pm

1 stop29h 45m

$396

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/2

Showing 1-10 of 13 results
1
2

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 December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
AranGrantPrice Accuracy2 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*2 stars
eDreamsPrice Accuracy3 starsTrust Score*3 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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Boston-Bilbao flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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 November 28, 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 $361). Flying from Boston to Bilbao in July is currently the most expensive (average of $578). 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 December 4, 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 December 4, 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
7.9
Good
8,010 reviews

Boarding

8.1

Overall

7.9

Crew

8.5

Comfort

7.9

Food

7.3

Entertainment

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,010 reviews
Delta
7.9
Good
8,010 reviews

Boarding

8.1

Overall

7.9

Crew

8.5

Comfort

7.9

Food

7.3

Entertainment

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
KLM
7.7
Good
1,430 reviews
Delta
7.9
Good
8,010 reviews

Boarding

8.1

Overall

7.9

Crew

8.5

Comfort

7.9

Food

7.3

Entertainment

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
United Airlines
7.4
Good
9,066 reviews
Delta
7.9
Good
8,010 reviews

Boarding

8.1

Overall

7.9

Crew

8.5

Comfort

7.9

Food

7.3

Entertainment

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Iberia
7.0
Good
3,040 reviews
Delta
7.9
Good
8,010 reviews

Boarding

8.1

Overall

7.9

Crew

8.5

Comfort

7.9

Food

7.3

Entertainment

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Lufthansa
6.8
Okay
7,612 reviews
Delta
7.9
Good
8,010 reviews

Boarding

8.1

Overall

7.9

Crew

8.5

Comfort

7.9

Food

7.3

Entertainment

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

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 9h 40m. Iberia provides one of the quickest options available for as low as $338. 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 42% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the cheapest airlines to fly from Boston to Bilbao one-way?

    To fly one-way, consider booking your trip with LEVEL, which is currently one of the cheapest options available, starting at $256. Iberia flights start at $365 while deals on TAP AIR PORTUGAL start at $376 one-way.

  • 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 $361). Flying from Boston to Bilbao in July is currently the most expensive (average of $578). 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 December 4, 2025.
AirlineCheapestAverageFlexibilityOn-time
IberiaCheapest$395Average$665FlexibilityNo cancel feeOn-time77%
DeltaCheapest$424Average$751FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$439Average$657FlexibilityNo cancel feeOn-time71%
LufthansaCheapest$453Average$755FlexibilityNo cancel feeOn-time76%
TAP AIR PORTUGALCheapest$468Average$586FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$499Average$712FlexibilityNo cancel feeOn-time69%
KLMCheapest$516Average$768FlexibilityNo cancel feeOn-time75%
LEVELCheapest$523Average$753FlexibilityNo cancel feeOn-timeN/A

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