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Bilbao

$319+ Cheap flights from Boston (BOS) to Bilbao (BIO)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/14. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — BIO
Dec 22 — Dec 291
Mon 12/22
Mon 12/29
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

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 November 22, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$392
(FlightHub)

One-way from

$319
(Kiwi.com)

Popular in

April

Cheapest in

September

Average price

$685
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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One-way flight 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 ($12 potential savings vs. average RT price).
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Average for round-trip flights in November 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 November 22, 2025.

This Expedia deal was found by Cheapflights users on 11/20. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/24:45 pmBOS - BIO
1 stop24h 30mIberia
Sun 12/79:35 pmBIO - BOS
2 stops48h 25mIberia
Deal found 11/20$425
This oojo deal was found by Cheapflights users on 11/21. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/2710:45 pmBOS - BIO
1 stop13h 10mTAP AIR PORTUGAL
Thu 12/412:10 pmBIO - BOS
1 stop32h 25mTAP AIR PORTUGAL
Deal found 11/21$455
This Booking.com deal was found by Cheapflights users on 11/20. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/26:40 pmBOS - BIO
2 stops39h 30mAir Canada
Sun 12/712:45 pmBIO - BOS
2 stops32h 07mAir Canada
Deal found 11/20$465
This Mytrip deal was found by Cheapflights users on 11/20. 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
2 stops24h 30mMultiple Airlines
Mon 12/88:00 amBIO - BOS
1 stop18h 00mMultiple Airlines
Deal found 11/20$483
This United Airlines deal was found by Cheapflights users on 11/20. 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 12/45:30 amBOS - BIO
2 stops29h 10mUnited Airlines
Mon 12/811:35 amBIO - BOS
2 stops40h 10mUnited Airlines
Deal found 11/20$510
This KAYAK deal was found by Cheapflights users on 11/21. 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 11/244:20 pmBOS - BIO
2 stops14h 30mBrussels Airlines
Mon 12/15:00 pmBIO - BOS
2 stops55h 35mBrussels Airlines
Deal found 11/21$552
This LEVEL deal was found by Cheapflights users on 11/20. 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 LEVEL is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/410:40 pmBOS - BIO
1 stop17h 50mLEVEL
Mon 12/87:10 amBIO - BOS
1 stop19h 45mLEVEL
Deal found 11/20$559
This Delta deal was found by Cheapflights users on 11/21. 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.
Thu 11/2712:05 pmBOS - BIO
2 stops17h 15mDelta
Thu 12/47:25 amBIO - BOS
1 stop12h 10mDelta
Deal found 11/21$562
This KAYAK deal was found by Cheapflights users on 11/21. 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 11/248:40 pmBOS - BIO
1 stop20h 25mLufthansa
Mon 12/15:35 pmBIO - BOS
2 stops55h 00mLufthansa
Deal found 11/21$588
This United Airlines deal was found by Cheapflights users on 11/21. 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.
Fri 12/54:20 pmBOS - BIO
1 stop13h 40mUnited Airlines
Tue 12/97:40 amBIO - BOS
1 stop16h 55mUnited Airlines
Deal found 11/21$601

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 November 22, 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

Sun 2/15

9:20 pm-11:15 pm

1 stop19h 55m

Bilbao

Wed 3/4

6:45 am-7:50 pm

1 stop19h 05m

$430

BostonBilbao

BOS - BIO

BOSBIO

Boston Logan Intl

Wed 2/4

8:40 pm-6:05 pm

1 stop15h 25m

Bilbao

Sun 2/8

7:25 am-6:35 pm

1 stop17h 10m

$435

BostonBilbao

BOS - BIO

BOSBIO

Boston Logan Intl

Thu 1/15

10:15 am-12:50 pm

2 stops20h 35m

Bilbao

Tue 1/20

11:35 am-8:20 pm

2 stops14h 45m

$438

BostonBilbao

BOS - BIO

BOSBIO

Boston Logan Intl

Wed 1/7

7:15 pm-11:15 pm

2 stops22h 00m

Bilbao

Wed 1/14

5:45 pm-8:55 pm

1 stop33h 10m

$444

BostonBilbao

BOS - BIO

BOSBIO

Boston Logan Intl

Thu 1/15

8:40 pm-9:55 pm

1 stop19h 15m

Bilbao

Tue 1/20

11:35 am-9:52 pm

2 stops16h 17m

$445

BostonBilbao

BOS - BIO

BOSBIO

Boston Logan Intl

Wed 1/7

8:20 pm-10:25 pm

1 stop20h 05m

Bilbao

Wed 1/14

7:25 am-4:20 pm

1 stop14h 55m

$446

BostonBilbao

BOS - BIO

BOSBIO

Boston Logan Intl

Mon 1/12

4:45 pm-8:30 am

1 stop9h 45m

Bilbao

Mon 1/19

3:05 pm-8:55 pm

1 stop11h 50m

$446

BostonBilbao

BOS - BIO

BOSBIO

Boston Logan Intl

Thu 11/27

10:45 pm-5:55 pm

1 stop13h 10m

Bilbao

Thu 12/4

12:10 pm-2:35 pm

1 stop32h 25m

$455

BostonBilbao

BOS - BIO

BOSBIO

Boston Logan Intl

Fri 12/5

5:30 am-12:00 pm

2 stops24h 30m

Bilbao

Tue 12/9

7:40 am-6:35 pm

1 stop16h 55m

$455

BostonBilbao

BOS - BIO

BOSBIO

Boston Logan Intl

Sun 12/14

7:50 pm-8:20 am

3 stops30h 30m

$319

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/21

Showing 1-10 of 18 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 November.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
AranGrantPrice Accuracy2 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 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 14, 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 $575). 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 November 22, 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 November 22, 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
8,003 reviews

Entertainment

7.9

Overall

7.9

Food

7.3

Comfort

7.9

Boarding

8.1

Crew

8.5

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
8,003 reviews
Delta
7.9
Good
8,003 reviews

Entertainment

7.9

Overall

7.9

Food

7.3

Comfort

7.9

Boarding

8.1

Crew

8.5

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
1,419 reviews
Delta
7.9
Good
8,003 reviews

Entertainment

7.9

Overall

7.9

Food

7.3

Comfort

7.9

Boarding

8.1

Crew

8.5

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
9,035 reviews
Delta
7.9
Good
8,003 reviews

Entertainment

7.9

Overall

7.9

Food

7.3

Comfort

7.9

Boarding

8.1

Crew

8.5

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
3,031 reviews
Delta
7.9
Good
8,003 reviews

Entertainment

7.9

Overall

7.9

Food

7.3

Comfort

7.9

Boarding

8.1

Crew

8.5

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
7,579 reviews
Delta
7.9
Good
8,003 reviews

Entertainment

7.9

Overall

7.9

Food

7.3

Comfort

7.9

Boarding

8.1

Crew

8.5

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 15h 25m. Finnair provides one of the quickest options available for as low as $435. 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 40% 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 $361). Flying from Boston to Bilbao in July is currently the most expensive (average of $575). 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 November 22, 2025.
AirlineCheapestAverageFlexibilityOn-time
IberiaCheapest$395Average$668FlexibilityNo cancel feeOn-time77%
DeltaCheapest$424Average$751FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$439Average$657FlexibilityNo cancel feeOn-time71%
LufthansaCheapest$453Average$752FlexibilityNo cancel feeOn-time76%
TAP AIR PORTUGALCheapest$468Average$647FlexibilityNo 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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