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Bilbao

$294+ 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 11/3. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — BIO
Aug 10 — Aug 171
Mon 8/10
Mon 8/17
1 adult, Economy
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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 July 11, 2026.

This Mytrip deal was found by Cheapflights users on 7/7. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/235:50 am
BOS
-
BIO
3 stops34h 50m
Multiple Airlines
Tue 10/610:50 pm
BIO
-
BOS
3 stops27h 30m
Multiple Airlines
Deal found 7/7$822
This United deal was found by Cheapflights users on 7/7. 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 United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/145:45 am
BOS
-
BIO
2 stops23h 00m
Multiple Airlines
Sun 7/196:30 pm
BIO
-
BOS
1 stop25h 20m
Multiple Airlines
Deal found 7/7$825
This Cheapflightsfares deal was found by Cheapflights users on 7/7. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/128:05 pm
BOS
-
BIO
1 stop21h 20m
Lufthansa
Sun 7/197:40 am
BIO
-
BOS
1 stop16h 00m
Lufthansa
Deal found 7/7$828
This Mytrip deal was found by Cheapflights users on 7/9. 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.
Fri 8/2112:30 pm
BOS
-
BIO
3 stops24h 05m
Multiple Airlines
Fri 8/287:00 am
BIO
-
BOS
3 stops45h 38m
Multiple Airlines
Deal found 7/9$834
This oojo deal was found by Cheapflights users on 7/7. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/157:27 pm
BOS
-
BIO
2 stops16h 28m
Lufthansa
Sun 7/197:40 am
BIO
-
BOS
1 stop16h 00m
Lufthansa
Deal found 7/7$835
This Cheapflightsfares deal was found by Cheapflights users on 7/9. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/208:05 pm
BOS
-
BIO
1 stop15h 50m
Lufthansa
Sat 8/16:50 am
BIO
-
BOS
1 stop19h 20m
Lufthansa
Deal found 7/9$836
This Air Canada deal was found by Cheapflights users on 7/11. 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.
Thu 8/1310:40 am
BOS
-
BIO
2 stops25h 15m
Air Canada
Fri 8/217:15 am
BIO
-
BOS
2 stops32h 38m
Air Canada
Deal found 7/11$837
This KAYAK deal was found by Cheapflights users on 7/10. 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.
Fri 8/289:40 pm
BOS
-
BIO
1 stop28h 40m
SWISS
Thu 9/38:45 pm
BIO
-
BOS
1 stop24h 25m
SWISS
Deal found 7/10$838
This United Airlines deal was found by Cheapflights users on 7/11. 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.
Wed 7/157:27 pm
BOS
-
BIO
2 stops21h 58m
United Airlines
Sun 7/1912:30 pm
BIO
-
BOS
2 stops29h 22m
United Airlines
Deal found 7/11$839
This United Airlines deal was found by Cheapflights users on 7/10. 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 8/288:05 pm
BOS
-
BIO
1 stop15h 50m
United Airlines
Wed 9/211:55 am
BIO
-
BOS
1 stop11h 45m
United Airlines
Deal found 7/10$841
This Air France deal was found by Cheapflights users on 7/7. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/85:10 pm
BOS
-
BIO
1 stop10h 40m
Air France
Sat 8/110:30 am
BIO
-
BOS
1 stop15h 05m
Air France
Deal found 7/7$843
This Mytrip deal was found by Cheapflights users on 7/10. 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 10/2210:40 am
BOS
-
BIO
3 stops30h 00m
Multiple Airlines
Fri 10/303:45 pm
BIO
-
BOS
2 stops34h 10m
Multiple Airlines
Deal found 7/10$844

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 July 11, 2026.

Most accurate provider

Ovago
3 stars

Most trusted provider

Ovago
3 stars

Round-trip from

$822
(Mytrip)

One-way from

$294
(Kiwi.com)

Popular in

July

Cheapest in

March

Average price

$1,090
Provider with most accurate pricing for Boston Logan Intl-Bilbao flight deals.
Search Deals
Provider most trusted by Cheapflights users for Boston Logan Intl-Bilbao flights.
Search Deals
From Boston Logan Intl to Bilbao
Search Deals
One-way flight from Boston Logan Intl to Bilbao
Search Deals
Highest demand for flights based on searches. 18% potential increase in price ($165 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($32 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals

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 July 11, 2026.
Use the filters below to find and compare flights from Boston to Bilbao that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BostonBilbao

BOS - BIO

BOSBIO

Boston Logan Intl

Fri 8/28

8:05 pm-5:55 pm

1 stop15h 50m

Bilbao

Wed 9/2

11:55 am-5:40 pm

1 stop11h 45m

$841

BostonBilbao

BOS - BIO

BOSBIO

Boston Logan Intl

Thu 8/27

8:05 pm-5:55 pm

1 stop15h 50m

Bilbao

Sat 9/5

7:15 am-5:40 pm

1 stop16h 25m

$861

BostonBilbao

BOS - BIO

BOSBIO

Boston Logan Intl

Fri 8/28

8:05 pm-5:55 pm

1 stop15h 50m

Bilbao

Sun 9/6

7:40 am-5:40 pm

1 stop16h 00m

$861

BostonBilbao

BOS - BIO

BOSBIO

Boston Logan Intl

Sun 12/20

11:05 am-10:50 am

2 stops41h 45m

Bilbao

Sun 1/10

6:45 am-10:12 am

2 stops33h 27m

$893

BostonBilbao

BOS - BIO

BOSBIO

Boston Logan Intl

Sat 8/15

8:05 pm-5:55 pm

1 stop15h 50m

Bilbao

Fri 8/21

7:15 am-5:40 pm

1 stop16h 25m

$915

BostonBilbao

BOS - BIO

BOSBIO

Boston Logan Intl

Sun 10/11

11:00 pm-6:00 pm

2 stops37h 00m

Bilbao

Thu 10/15

12:15 pm-4:59 pm

2 stops34h 44m

$930
Quickest round-trip

BostonBilbao

BOS - BIO

BOSBIO

Boston Logan Intl

Thu 8/13

9:45 pm-4:30 pm

2 stops12h 45m

Bilbao

Sat 8/22

8:20 am-4:31 pm

1 stop14h 11m

$1,027

BostonBilbao

BOS - BIO

BOSBIO

Boston Logan Intl

Thu 8/13

9:45 pm-4:30 pm

2 stops12h 45m

Bilbao

Sun 8/23

8:20 am-4:31 pm

1 stop14h 11m

$1,186

BostonBilbao

BOS - BIO

BOSBIO

Boston Logan Intl

Wed 12/23

8:00 pm-5:00 pm

2 stops39h 00m

Bilbao

Sat 1/2

6:45 am-11:18 pm

2 stops22h 33m

$1,338

BostonBilbao

BOS - BIO

BOSBIO

Boston Logan Intl

Fri 8/7

11:53 am-12:45 pm

3 stops42h 52m

Bilbao

Tue 8/18

9:15 am-11:05 pm

2 stops43h 50m

$13,726

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/11

Showing 1-10 of 20 resultsSorted by cheapest first
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 July.
ProviderPrice AccuracyTrust Score*
OvagoPrice Accuracy3 starsTrust Score*3 stars
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice 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 Ovago to be most consistent on Cheapflights vs. Ovago Users can find the same prices on Boston-Bilbao flight deals on Cheapflights vs. Ovago >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 Ovago the most. Ovago 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?

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 56 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, March is the cheapest month in which you can book a flight from Boston to Bilbao (average of $495). Flying from Boston to Bilbao in July is currently the most expensive (average of $1,090). 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.

How much does it cost to fly round-trip from Boston to Bilbao?

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 July 11, 2026.
Read through reviews of airlines operating flights from Boston to Bilbao, such as KLM,Delta, andUnited Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.8
Good
1,537 reviews

Food

7.3

Entertainment

7.2

Crew

8.4

Boarding

7.8

Comfort

7.7

Overall

7.8

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
KLM
7.8
Good
1,537 reviews
KLM
7.8
Good
1,537 reviews

Food

7.3

Entertainment

7.2

Crew

8.4

Boarding

7.8

Comfort

7.7

Overall

7.8

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
Delta
7.8
Good
8,459 reviews
KLM
7.8
Good
1,537 reviews

Food

7.3

Entertainment

7.2

Crew

8.4

Boarding

7.8

Comfort

7.7

Overall

7.8

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
United Airlines
7.4
Good
9,980 reviews
KLM
7.8
Good
1,537 reviews

Food

7.3

Entertainment

7.2

Crew

8.4

Boarding

7.8

Comfort

7.7

Overall

7.8

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
Iberia
7.0
Good
3,252 reviews
KLM
7.8
Good
1,537 reviews

Food

7.3

Entertainment

7.2

Crew

8.4

Boarding

7.8

Comfort

7.7

Overall

7.8

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
Lufthansa
6.8
Okay
8,130 reviews
KLM
7.8
Good
1,537 reviews

Food

7.3

Entertainment

7.2

Crew

8.4

Boarding

7.8

Comfort

7.7

Overall

7.8

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful

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 50m. United Airlines provides one of the quickest options available for as low as $841. There are 3348 mi between Boston and Bilbao.

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

    According to our current data, Iberia ($390), United Airlines ($393), and Lufthansa ($463) offers the cheapest pricing from Boston to Bilbao. Iberia is 47% 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, March is the cheapest month in which you can book a flight from Boston to Bilbao (average of $495). Flying from Boston to Bilbao in July is currently the most expensive (average of $1,090). 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 10 airlines flying from Boston to Bilbao

Discover the top 10 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 July 11, 2026.
AirlineCheapestAverageFlexibilityOn-time
IberiaCheapest$390Average$660FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$393Average$1,055FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$463Average$924FlexibilityNo cancel feeOn-time76%
TAP AIR PORTUGALCheapest$468Average$949FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$495Average$897FlexibilityNo cancel feeOn-time71%
KLMCheapest$611Average$1,046FlexibilityNo cancel feeOn-time75%
Air FranceCheapest$663Average$813FlexibilityNo cancel feeOn-time77%
Air EuropaCheapest$714Average$971FlexibilityNo cancel feeOn-time83%
DeltaCheapest$729Average$1,021FlexibilityNo cancel feeOn-timeN/A
LEVELCheapest$897Average$1,023FlexibilityNo cancel feeOn-timeN/A

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