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Bilbao

$295+ 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 7/7. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — BIO
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
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Cheapflights Tip: The best prices from Boston Logan Intl to Bilbao are usually found in February or March, booked 14 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 June 12, 2025.

Round-trip from

$420
(Iberia)

One-way from

$295
(Kiwi.com)

Popular in

December

Cheapest in

February

Average price

$761
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. 6% potential increase in price ($48 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($15 potential savings vs. average RT price).
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Average for round-trip flights in June 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 June 12, 2025.

This American Airlines deal was found by Cheapflights users on 6/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/241:00 pmBOS - BIO
2 stops13h 30mAmerican Airlines
Thu 10/26:45 amBIO - BOS
1 stop19h 05mAmerican Airlines
Deal found 6/10$374
This Finnair deal was found by Cheapflights users on 6/10. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/159:20 pmBOS - BIO
1 stop19h 55mMultiple Airlines
Mon 9/229:35 pmBIO - BOS
1 stop23h 25mMultiple Airlines
Deal found 6/10$405
This Cheapflightsfares deal was found by Cheapflights users on 6/12. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/264:30 pmBOS - BIO
1 stop14h 15mIberia
Fri 10/241:30 pmBIO - BOS
1 stop12h 20mIberia
Deal found 6/12$415
This Delta deal was found by Cheapflights users on 6/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/1610:00 amBOS - BIO
2 stops19h 15mDelta
Tue 8/126:50 amBIO - BOS
1 stop17h 35mDelta
Deal found 6/10$478
This Lufthansa deal was found by Cheapflights users on 6/11. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/175:50 pmBOS - BIO
1 stop18h 30mLufthansa
Thu 9/256:45 amBIO - BOS
1 stop19h 25mLufthansa
Deal found 6/11$494
This United Airlines deal was found by Cheapflights users on 6/10. 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.
Wed 9/173:16 pmBOS - BIO
2 stops21h 04mUnited Airlines
Thu 9/256:45 amBIO - BOS
1 stop19h 25mUnited Airlines
Deal found 6/10$495
This Air Canada deal was found by Cheapflights users on 6/11. 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.
Wed 9/246:00 amBOS - BIO
2 stops28h 05mAir Canada
Thu 10/26:45 amBIO - BOS
2 stops20h 40mAir Canada
Deal found 6/11$496
This KLM deal was found by Cheapflights users on 6/10. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/410:20 pmBOS - BIO
1 stop17h 40mKLM
Wed 8/207:10 amBIO - BOS
1 stop12h 30mKLM
Deal found 6/10$551
This Gurufare deal was found by Cheapflights users on 6/10. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/49:25 pmBOS - BIO
1 stop14h 05mAer Lingus
Thu 8/146:10 pmBIO - BOS
1 stop26h 30mAer Lingus
Deal found 6/10$609
This SWISS deal was found by Cheapflights users on 6/10. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/165:05 pmBOS - BIO
1 stop18h 10mSWISS
Thu 8/76:05 pmBIO - BOS
1 stop27h 20mSWISS
Deal found 6/10$621
This FlightHub deal was found by Cheapflights users on 6/10. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/28:05 pmBOS - BIO
2 stops38h 00mBrussels Airlines
Tue 7/84:55 pmBIO - BOS
2 stops29h 00mBrussels Airlines
Deal found 6/10$714
This TAP AIR PORTUGAL deal was found by Cheapflights users on 6/11. 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 TAP AIR PORTUGAL is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/2610:45 pmBOS - BIO
1 stop30h 55mTAP AIR PORTUGAL
Sat 8/26:35 pmBIO - BOS
2 stops31h 50mTAP AIR PORTUGAL
Deal found 6/11$840

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 June 12, 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 9/24

1:00 pm-8:30 am

2 stops13h 30m

Bilbao

Thu 10/2

6:45 am-7:50 pm

1 stop19h 05m

$374

BostonBilbao

BOS - BIO

BOSBIO

Boston Logan Intl

Mon 9/15

9:20 pm-11:15 pm

1 stop19h 55m

Bilbao

Mon 9/22

9:35 pm-3:00 pm

1 stop23h 25m

$405

BostonBilbao

BOS - BIO

BOSBIO

Boston Logan Intl

Fri 9/26

4:30 pm-12:45 pm

1 stop14h 15m

Bilbao

Fri 10/24

1:30 pm-7:50 pm

1 stop12h 20m

$415

BostonBilbao

BOS - BIO

BOSBIO

Boston Logan Intl

Wed 7/16

10:00 am-11:15 am

2 stops19h 15m

Bilbao

Tue 8/12

6:50 am-6:25 pm

1 stop17h 35m

$478

BostonBilbao

BOS - BIO

BOSBIO

Boston Logan Intl

Wed 9/17

5:50 pm-6:20 pm

1 stop18h 30m

Bilbao

Thu 9/25

6:45 am-8:10 pm

1 stop19h 25m

$494

BostonBilbao

BOS - BIO

BOSBIO

Boston Logan Intl

Wed 9/17

3:16 pm-6:20 pm

2 stops21h 04m

Bilbao

Thu 9/25

6:45 am-8:10 pm

1 stop19h 25m

$495

BostonBilbao

BOS - BIO

BOSBIO

Boston Logan Intl

Wed 9/24

6:00 am-4:05 pm

2 stops28h 05m

Bilbao

Thu 10/2

6:45 am-9:25 pm

2 stops20h 40m

$496

BostonBilbao

BOS - BIO

BOSBIO

Boston Logan Intl

Mon 8/4

10:20 pm-10:00 pm

1 stop17h 40m

Bilbao

Wed 8/20

7:10 am-1:40 pm

1 stop12h 30m

$551

BostonBilbao

BOS - BIO

BOSBIO

Boston Logan Intl

Mon 8/4

9:25 pm-5:30 pm

1 stop14h 05m

Bilbao

Thu 8/14

6:10 pm-2:40 pm

1 stop26h 30m

$609

BostonBilbao

BOS - BIO

BOSBIO

Boston Logan Intl

Wed 7/16

5:05 pm-5:15 pm

1 stop18h 10m

Bilbao

Thu 8/7

6:05 pm-3:25 pm

1 stop27h 20m

$621

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

Showing 1-10 of 20 results
1
2

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 June 9, 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 14 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, January is the cheapest month in which you can book a flight from Boston to Bilbao (average of $541). Flying from Boston to Bilbao in June is currently the most expensive (average of $1,139). 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 June 12, 2025.

It’s typically best to fly out from Boston to Bilbao in the morning. Doing so could potentially save you 20% on the flight price compared to flying in the afternoon, which is usually more expensive.

Rainfall in Bilbao by month

Plan your trip to Bilbao by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Bilbao ranges from 2.4 - 5.6 inches per month. November is typically the wettest month, when rainfall can reach 5.6 in. July is typically the driest time to visit Bilbao when rainfall is around 2.4 in.

Temperature in Bilbao by month

Plan your trip to Bilbao by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Bilbao, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 68.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 48.2 F).

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 June 12, 2025.
To help decide which airline to fly from Boston to Bilbao, see what other customers have to say about Delta, KLM and Austrian Airlines. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,950 reviews

Entertainment

7.9

Crew

8.5

Overall

8.0

Comfort

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,950 reviews
Delta
8.0
Very good
7,950 reviews

Entertainment

7.9

Crew

8.5

Overall

8.0

Comfort

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
KLM
7.8
Good
1,358 reviews
Delta
8.0
Very good
7,950 reviews

Entertainment

7.9

Crew

8.5

Overall

8.0

Comfort

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Austrian Airlines
7.6
Good
802 reviews
Delta
8.0
Very good
7,950 reviews

Entertainment

7.9

Crew

8.5

Overall

8.0

Comfort

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Finnair
7.6
Good
1,290 reviews
Delta
8.0
Very good
7,950 reviews

Entertainment

7.9

Crew

8.5

Overall

8.0

Comfort

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
SWISS
7.5
Good
1,623 reviews
Delta
8.0
Very good
7,950 reviews

Entertainment

7.9

Crew

8.5

Overall

8.0

Comfort

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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.

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

    According to our current data, Iberia ($420), Finnair ($455), and Delta ($478) offers the cheapest pricing from Boston to Bilbao. Iberia is 39% 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 Vueling, which is currently one of the cheapest options available, starting at $314. Iberia flights start at $383 while deals on SWISS start at $414 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, January is the cheapest month in which you can book a flight from Boston to Bilbao (average of $541). Flying from Boston to Bilbao in June is currently the most expensive (average of $1,139). 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.

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 9 airlines flying from Boston to Bilbao

Discover the top 9 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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
LEVELCheapest$418Average$753FlexibilityNo cancel feeOn-timeN/A
TAP AIR PORTUGALCheapest$428Average$695FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$439Average$657FlexibilityNo cancel feeOn-time71%
DeltaCheapest$481Average$750FlexibilityNo cancel feeOn-timeN/A
IberiaCheapest$525Average$713FlexibilityNo cancel feeOn-time77%
KLMCheapest$532Average$891FlexibilityNo cancel feeOn-time75%
LufthansaCheapest$573Average$795FlexibilityNo cancel feeOn-time76%
Air FranceCheapest$608Average$813FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$616Average$712FlexibilityNo cancel feeOn-time69%

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