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$260+ 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 2/10. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — BIO
Feb 6 — Feb 131
Fri 2/6
Fri 2/13
1 adult, Economy
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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 January 7, 2026.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$341
(Orbitz)

One-way from

$260
(Kiwi.com)

Popular in

February

Cheapest in

January

Average price

$529
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. 3% potential increase in price ($20 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($29 potential savings vs. average RT price).
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Average for round-trip flights in January 2026
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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 January 7, 2026.

This Orbitz deal was found by Cheapflights users on 1/6. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 1/1910:40 pmBOS - BIO
1 stop18h 15mIberia
Fri 1/309:15 amBIO - BOS
1 stop12h 00mIberia
Deal found 1/6$341
This Finnair deal was found by Cheapflights users on 1/5. 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.
Wed 3/49:20 pmBOS - BIO
1 stop19h 55mMultiple Airlines
Mon 3/99:35 pmBIO - BOS
1 stop23h 40mMultiple Airlines
Deal found 1/5$353
This KLM deal was found by Cheapflights users on 1/7. 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.
Tue 2/38:35 pmBOS - BIO
1 stop19h 50mMultiple Airlines
Wed 3/187:25 amBIO - BOS
1 stop14h 55mMultiple Airlines
Deal found 1/7$358
This Delta deal was found by Cheapflights users on 1/7. 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.
Tue 2/39:00 amBOS - BIO
2 stops20h 30mDelta
Wed 3/187:25 amBIO - BOS
1 stop14h 55mDelta
Deal found 1/7$363
This FlightHub deal was found by Cheapflights users on 1/7. 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.
Tue 3/109:40 pmBOS - BIO
1 stop19h 15mLufthansa
Mon 3/166:50 pmBIO - BOS
1 stop29h 45mLufthansa
Deal found 1/7$366
This Iberia deal was found by Cheapflights users on 1/7. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/85:40 pmBOS - BIO
1 stop13h 05mIberia
Thu 10/81:30 pmBIO - BOS
1 stop12h 20mIberia
Deal found 1/7$367
This Gotogate deal was found by Cheapflights users on 1/7. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/115:30 amBOS - BIO
2 stops24h 35mMultiple Airlines
Tue 2/177:40 amBIO - BOS
1 stop16h 55mMultiple Airlines
Deal found 1/7$369
This Air France deal was found by Cheapflights users on 1/6. 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.
Tue 3/107:30 pmBOS - BIO
1 stop11h 00mAir France
Mon 3/166:05 pmBIO - BOS
1 stop25h 25mAir France
Deal found 1/6$370
This Delta deal was found by Cheapflights users on 1/7. 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.
Mon 3/168:59 pmBOS - BIO
2 stops15h 21mDelta
Wed 3/2512:15 pmBIO - BOS
2 stops16h 38mDelta
Deal found 1/7$373
This Finnair deal was found by Cheapflights users on 1/7. 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 9/89:20 pmBOS - BIO
1 stop19h 55mFinnair
Thu 10/86:45 amBIO - BOS
2 stops21h 34mFinnair
Deal found 1/7$377
This FlightHub deal was found by Cheapflights users on 1/7. 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.
Tue 3/109:40 pmBOS - BIO
1 stop19h 15mMultiple Airlines
Mon 3/165:35 pmBIO - BOS
2 stops26h 30mMultiple Airlines
Deal found 1/7$380

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 January 7, 2026.
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

Mon 1/19

10:40 pm-10:55 pm

1 stop18h 15m

Bilbao

Fri 1/30

9:15 am-3:15 pm

1 stop12h 00m

$341

BostonBilbao

BOS - BIO

BOSBIO

Boston Logan Intl

Wed 3/4

9:20 pm-11:15 pm

1 stop19h 55m

Bilbao

Mon 3/9

9:35 pm-4:15 pm

1 stop23h 40m

$353

BostonBilbao

BOS - BIO

BOSBIO

Boston Logan Intl

Mon 3/16

7:30 pm-5:20 pm

1 stop16h 50m

Bilbao

Wed 3/25

7:25 am-5:20 pm

1 stop14h 55m

$358

BostonBilbao

BOS - BIO

BOSBIO

Boston Logan Intl

Tue 2/3

8:35 pm-10:25 pm

1 stop19h 50m

Bilbao

Wed 3/18

7:25 am-5:20 pm

1 stop14h 55m

$358

BostonBilbao

BOS - BIO

BOSBIO

Boston Logan Intl

Tue 2/3

9:00 am-11:30 am

2 stops20h 30m

Bilbao

Wed 3/18

7:25 am-5:20 pm

1 stop14h 55m

$363

BostonBilbao

BOS - BIO

BOSBIO

Boston Logan Intl

Mon 3/16

1:55 pm-11:30 am

2 stops16h 35m

Bilbao

Wed 3/25

7:25 am-5:20 pm

1 stop14h 55m

$363

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

$366

BostonBilbao

BOS - BIO

BOSBIO

Boston Logan Intl

Mon 1/19

5:45 am-10:50 am

2 stops23h 05m

Bilbao

Fri 1/30

11:35 am-2:00 pm

2 stops32h 25m

$377

BostonBilbao

BOS - BIO

BOSBIO

Boston Logan Intl

Sun 2/22

7:10 pm-4:30 pm

1 stop15h 20m

Bilbao

Tue 3/10

7:25 am-7:15 am

2 stops28h 50m

$377

BostonBilbao

BOS - BIO

BOSBIO

Boston Logan Intl

Tue 3/10

9:40 pm-9:55 pm

1 stop19h 15m

Bilbao

Mon 3/16

5:35 pm-3:05 pm

2 stops26h 30m

$380

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/6

Showing 1-10 of 17 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 January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*2 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 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 January 2, 2026.

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.

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 January 7, 2026.
Read through reviews of airlines operating flights from Boston to Bilbao, such as KLM, United Airlines, and Iberia. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.7
Good
1,434 reviews

Overall

7.7

Entertainment

7.1

Comfort

7.6

Boarding

7.8

Food

7.2

Crew

8.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
KLM
7.7
Good
1,434 reviews
KLM
7.7
Good
1,434 reviews

Overall

7.7

Entertainment

7.1

Comfort

7.6

Boarding

7.8

Food

7.2

Crew

8.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
United Airlines
7.4
Good
9,139 reviews
KLM
7.7
Good
1,434 reviews

Overall

7.7

Entertainment

7.1

Comfort

7.6

Boarding

7.8

Food

7.2

Crew

8.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
Iberia
7.0
Good
3,076 reviews
KLM
7.7
Good
1,434 reviews

Overall

7.7

Entertainment

7.1

Comfort

7.6

Boarding

7.8

Food

7.2

Crew

8.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
Lufthansa
6.8
Okay
7,692 reviews
KLM
7.7
Good
1,434 reviews

Overall

7.7

Entertainment

7.1

Comfort

7.6

Boarding

7.8

Food

7.2

Crew

8.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle

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 16h 50m. Iberia provides one of the quickest options available for as low as $358. 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 ($391), United Airlines ($393), and Delta ($424) 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.

  • 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. Delta flights start at $320 while deals on Iberia start at $365 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 7 airlines flying from Boston to Bilbao

Discover the top 7 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 January 7, 2026.
AirlineCheapestAverageFlexibilityOn-time
IberiaCheapest$391Average$658FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$393Average$703FlexibilityNo cancel feeOn-time69%
DeltaCheapest$424Average$741FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$439Average$657FlexibilityNo cancel feeOn-time71%
LufthansaCheapest$453Average$751FlexibilityNo cancel feeOn-time76%
KLMCheapest$516Average$739FlexibilityNo cancel feeOn-time75%
LEVELCheapest$523Average$753FlexibilityNo cancel feeOn-timeN/A

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