$361+ 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 6/2. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — BIO
May 18 — May 251
Round-trip
1 adult, Economy
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Find cheap flights from Boston to Bilbao with Cheapflights
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Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
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Cheapest flights from Boston to BilbaoExplore 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 April 18, 2026.
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 April 18, 2026.
This Trip.com deal was found by Cheapflights users on 4/13. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/75:40 pm
BOS
- BIO
1 stop19h 05m
Scandinavian Airlines
Thu 5/148:00 pm
BIO
- BOS
1 stop25h 35m
Scandinavian Airlines
Deal found 4/13![Scandinavian Airlines logo]()
$558
This Cheapflightsfares deal was found by Cheapflights users on 4/14. 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 10/199:40 pm
BOS
- BIO
1 stop16h 25m
SWISS
Wed 10/289:25 am
BIO
- BOS
1 stop16h 55m
SWISS
Deal found 4/14![SWISS logo]()
$575
This Gotogate deal was found by Cheapflights users on 4/15. 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.
Thu 9/175:40 pm
BOS
- BIO
1 stop19h 05m
Scandinavian Airlines
Fri 9/257:35 pm
BIO
- BOS
1 stop26h 00m
Scandinavian Airlines
Deal found 4/15![Scandinavian Airlines logo]()
$592
This LEVEL deal was found by Cheapflights users on 4/15. 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.
Fri 5/110:50 pm
BOS
- BIO
1 stop12h 20m
LEVEL
Fri 5/1510:50 pm
BIO
- BOS
1 stop28h 15m
LEVEL
Deal found 4/15![LEVEL logo]()
$593
This Priceline deal was found by Cheapflights users on 4/14. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/209:20 pm
BOS
- BIO
1 stop19h 55m
Finnair
Wed 10/286:45 am
BIO
- BOS
1 stop19h 15m
Finnair
Deal found 4/14![Finnair logo]()
$595
This LEVEL deal was found by Cheapflights users on 4/15. 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.
Sun 8/1611:50 pm
BOS
- BIO
1 stop30h 35m
LEVEL
Thu 8/277:10 am
BIO
- BOS
1 stop20h 05m
LEVEL
Deal found 4/15![LEVEL logo]()
$596
This Booking.com deal was found by Cheapflights users on 4/14. 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.
Mon 10/199:40 pm
BOS
- BIO
1 stop16h 25m
SWISS
Fri 10/309:40 am
BIO
- BOS
1 stop16h 40m
SWISS
Deal found 4/14![SWISS logo]()
$597
This Kiwi.com deal was found by Cheapflights users on 4/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/1111:50 pm
BOS
- BIO
1 stop10h 35m
Multiple Airlines
Sat 10/246:45 am
BIO
- BOS
1 stop20h 30m
Multiple Airlines
Deal found 4/15![Multiple Airlines logo]()
$599
This LEVEL deal was found by Cheapflights users on 4/15. 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.
Wed 9/911:00 pm
BOS
- BIO
1 stop17h 55m
LEVEL
Sun 9/207:10 am
BIO
- BOS
1 stop20h 55m
LEVEL
Deal found 4/15![LEVEL logo]()
$604
This KLM deal was found by Cheapflights users on 4/14. 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 10/195:35 pm
BOS
- BIO
1 stop12h 20m
KLM
Tue 10/275:20 pm
BIO
- BOS
1 stop31h 35m
KLM
Deal found 4/14![KLM logo]()
$606
This United Airlines deal was found by Cheapflights users on 4/14. 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.
Tue 10/208:05 pm
BOS
- BIO
1 stop15h 50m
United Airlines
Thu 10/2911:35 am
BIO
- BOS
1 stop13h 00m
United Airlines
Deal found 4/14![United Airlines logo]()
$608
Best flights from Boston to BilbaoDiscover carefully curated flight deals from Boston to Bilbao that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 18, 2026.
Discover carefully curated flight deals from Boston to Bilbao that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 18, 2026.
This KLM deal was found by Cheapflights users on 4/15. 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 5/255:25 pm
BOS
- BIO
1 stop12h 30m
KLM
Fri 6/58:20 am
BIO
- BOS
1 stop14h 10m
KLM
Deal found 4/15![KLM logo]()
$725
This Finnair deal was found by Cheapflights users on 4/17. 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.
Sun 5/249:20 pm
BOS
- BIO
1 stop18h 45m
Multiple Airlines
Fri 6/56:45 am
BIO
- BOS
1 stop18h 25m
Multiple Airlines
Deal found 4/17![Multiple Airlines logo]()
$725
This Delta deal was found by Cheapflights users on 4/18. 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 5/258:25 pm
BOS
- BIO
1 stop14h 05m
Delta
Fri 6/56:45 am
BIO
- BOS
2 stops15h 15m
Delta
Deal found 4/18![Delta logo]()
$761
This British Airways deal was found by Cheapflights users on 4/18. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/19:20 pm
BOS
- BIO
1 stop13h 35m
British Airways
Mon 6/81:30 pm
BIO
- BOS
1 stop12h 20m
British Airways
Deal found 4/18![British Airways logo]()
$785
This LEVEL deal was found by Cheapflights users on 4/14. 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.
Sat 7/411:00 pm
BOS
- BIO
1 stop29h 00m
LEVEL
Mon 7/136:50 am
BIO
- BOS
1 stop20h 25m
LEVEL
Deal found 4/14![LEVEL logo]()
$790
This Finnair deal was found by Cheapflights users on 4/18. 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 6/309:20 pm
BOS
- BIO
1 stop19h 55m
Finnair
Wed 7/86:45 am
BIO
- BOS
1 stop19h 05m
Finnair
Deal found 4/18![Finnair logo]()
$795
This Delta deal was found by Cheapflights users on 4/17. 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.
Sun 5/245:05 pm
BOS
- BIO
2 stops17h 25m
Delta
Fri 6/56:45 am
BIO
- BOS
2 stops18h 18m
Delta
Deal found 4/17![Delta logo]()
$766
This British Airways deal was found by Cheapflights users on 4/16. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/45:40 pm
BOS
- BIO
1 stop17h 15m
British Airways
Mon 7/139:35 pm
BIO
- BOS
1 stop24h 35m
British Airways
Deal found 4/16![British Airways logo]()
$796
This Finnair deal was found by Cheapflights users on 4/16. 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.
Sat 7/49:20 pm
BOS
- BIO
1 stop19h 55m
Multiple Airlines
Mon 7/139:35 pm
BIO
- BOS
1 stop24h 35m
Multiple Airlines
Deal found 4/16![Multiple Airlines logo]()
$796
This KLM deal was found by Cheapflights users on 4/15. 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.
Sun 6/215:25 pm
BOS
- BIO
1 stop16h 30m
KLM
Mon 6/298:20 am
BIO
- BOS
1 stop14h 10m
KLM
Deal found 4/15![KLM logo]()
$865
This Delta deal was found by Cheapflights users on 4/13. 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.
Fri 5/295:10 pm
BOS
- BIO
1 stop10h 40m
Delta
Tue 6/96:45 am
BIO
- BOS
2 stops15h 24m
Delta
Deal found 4/13![Delta logo]()
$819
Last-minute flights from Boston to BilbaoDiscover last-minute flight deals from Boston to Bilbao. Data last updated April 18, 2026 and is based on user searches.
Discover last-minute flight deals from Boston to Bilbao. Data last updated April 18, 2026 and is based on user searches.
This LEVEL deal was found by Cheapflights users on 4/15. 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.
Fri 5/110:50 pm
BOS
- BIO
1 stop12h 20m
LEVEL
Fri 5/1510:50 pm
BIO
- BOS
1 stop28h 15m
LEVEL
Deal found 4/15![LEVEL logo]()
$593
This American Airlines deal was found by Cheapflights users on 4/15. 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.
Fri 5/15:09 pm
BOS
- BIO
2 stops13h 36m
American Airlines
Fri 5/151:30 pm
BIO
- BOS
1 stop12h 20m
American Airlines
Deal found 4/15![American Airlines logo]()
$680
This Orbitz deal was found by Cheapflights users on 4/14. 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.
Tue 5/59:00 pm
BOS
- BIO
1 stop9h 45m
Iberia
Tue 5/191:10 pm
BIO
- BOS
1 stop13h 55m
Iberia
Deal found 4/14![Iberia logo]()
$622
This British Airways deal was found by Cheapflights users on 4/14. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/52:48 pm
BOS
- BIO
2 stops15h 57m
Multiple Airlines
Tue 5/191:30 pm
BIO
- BOS
2 stops15h 24m
Multiple Airlines
Deal found 4/14![Multiple Airlines logo]()
$639
This Trip.com deal was found by Cheapflights users on 4/13. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/75:40 pm
BOS
- BIO
1 stop19h 05m
Scandinavian Airlines
Thu 5/148:00 pm
BIO
- BOS
1 stop25h 35m
Scandinavian Airlines
Deal found 4/13![Scandinavian Airlines logo]()
$558
This Expedia deal was found by Cheapflights users on 4/13. 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.
Thu 5/711:34 am
BOS
- BIO
2 stops14h 56m
Iberia
Thu 5/141:20 pm
BIO
- BOS
1 stop13h 45m
Iberia
Deal found 4/13![Iberia logo]()
$676
This American Airlines deal was found by Cheapflights users on 4/13. 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.
Thu 5/711:34 am
BOS
- BIO
2 stops14h 56m
American Airlines
Thu 5/149:15 am
BIO
- BOS
2 stops15h 33m
American Airlines
Deal found 4/13![American Airlines logo]()
$689
This Gotogate deal was found by Cheapflights users on 4/14. 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.
Tue 5/129:00 pm
BOS
- BIO
1 stop9h 45m
British Airways
Tue 5/269:15 am
BIO
- BOS
1 stop16h 00m
British Airways
Deal found 4/14![British Airways logo]()
$652
This British Airways deal was found by Cheapflights users on 4/14. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/122:48 pm
BOS
- BIO
2 stops15h 57m
Multiple Airlines
Tue 5/269:15 am
BIO
- BOS
1 stop16h 00m
Multiple Airlines
Deal found 4/14![Multiple Airlines logo]()
$659
This Delta deal was found by Cheapflights users on 4/14. 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 5/121:29 pm
BOS
- BIO
2 stops14h 21m
Delta
Tue 5/2612:00 pm
BIO
- BOS
2 stops17h 37m
Delta
Deal found 4/14![Delta logo]()
$684
This Trip.com deal was found by Cheapflights users on 4/18. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/175:40 pm
BOS
- BIO
1 stop11h 55m
Scandinavian Airlines
Wed 5/207:35 pm
BIO
- BOS
1 stop26h 00m
Scandinavian Airlines
Deal found 4/18![Scandinavian Airlines logo]()
$681
One-way flights from Boston to BilbaoSearch for one-way flight options from Boston to Bilbao. Find affordable one-way fares based on user searches. Data last updated April 18, 2026.
Search for one-way flight options from Boston to Bilbao. Find affordable one-way fares based on user searches. Data last updated April 18, 2026.
This Kiwi.com deal was found by Cheapflights users on 4/14. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/210:50 pm
BOS
- BIO
1 stop27h 25m
LEVEL
Deal found 4/14![LEVEL logo]()
$361
This Iberia deal was found by Cheapflights users on 4/14. 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.
Thu 6/410:50 pm
BOS
- BIO
1 stop10h 05m
Iberia
Deal found 4/14![Iberia logo]()
$383
This Kiwi.com deal was found by Cheapflights users on 4/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/117:10 am
BOS
- BIO
3 stops47h 15m
Multiple Airlines
Deal found 4/16![Multiple Airlines logo]()
$385
This Kiwi.com deal was found by Cheapflights users on 4/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/66:00 am
BOS
- BIO
3 stops28h 35m
Multiple Airlines
Deal found 4/15![Multiple Airlines logo]()
$387
This Kiwi.com deal was found by Cheapflights users on 4/14. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/311:15 am
BOS
- BIO
3 stops51h 45m
Multiple Airlines
Deal found 4/14![Multiple Airlines logo]()
$389
This Mytrip deal was found by Cheapflights users on 4/16. 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.
Sun 5/108:50 pm
BOS
- BIO
2 stops18h 10m
Multiple Airlines
Deal found 4/16![Multiple Airlines logo]()
$391
This Kiwi.com deal was found by Cheapflights users on 4/13. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/298:50 pm
BOS
- BIO
3 stops56h 35m
Multiple Airlines
Deal found 4/13![Multiple Airlines logo]()
$394
This Kiwi.com deal was found by Cheapflights users on 4/14. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/911:00 pm
BOS
- BIO
3 stops41h 40m
Multiple Airlines
Deal found 4/14![Multiple Airlines logo]()
$398
This Kiwi.com deal was found by Cheapflights users on 4/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/1211:30 pm
BOS
- BIO
2 stops15h 30m
Multiple Airlines
Deal found 4/15![Multiple Airlines logo]()
$413
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 April 18, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $558 (Trip.com) |
One-way from | $361 (Kiwi.com) |
Popular in | July |
Cheapest in | October |
Average price | $739 |
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 April 18, 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
Cheapest round-trip
BostonBilbao
BOS - BIO
BOSBIO
Boston Logan Intl
Mon 5/25
5:25 pm-11:55 am
1 stop12h 30m
Bilbao
Fri 6/5
8:20 am-4:30 pm
1 stop14h 10m
$725
BostonBilbao
BOS - BIO
BOSBIO
Boston Logan Intl
Sun 5/24
9:20 pm-10:05 pm
1 stop18h 45m
Bilbao
Fri 6/5
6:45 am-7:10 pm
1 stop18h 25m
$725
BostonBilbao
BOS - BIO
BOSBIO
Boston Logan Intl
Mon 5/25
8:25 pm-4:30 pm
1 stop14h 05m
Bilbao
Fri 6/5
6:45 am-4:00 pm
2 stops15h 15m
$761
BostonBilbao
BOS - BIO
BOSBIO
Boston Logan Intl
Sun 5/24
5:05 pm-4:30 pm
2 stops17h 25m
Bilbao
Fri 6/5
6:45 am-7:03 pm
2 stops18h 18m
$766
Quickest round-trip
BostonBilbao
BOS - BIO
BOSBIO
Boston Logan Intl
Mon 6/1
9:20 pm-4:55 pm
1 stop13h 35m
Bilbao
Mon 6/8
1:30 pm-7:50 pm
1 stop12h 20m
$785
BostonBilbao
BOS - BIO
BOSBIO
Boston Logan Intl
Sat 7/4
11:00 pm-10:00 am
1 stop29h 00m
Bilbao
Mon 7/13
6:50 am-9:15 pm
1 stop20h 25m
$790
BostonBilbao
BOS - BIO
BOSBIO
Boston Logan Intl
Tue 6/30
9:20 pm-11:15 pm
1 stop19h 55m
Bilbao
Wed 7/8
6:45 am-7:50 pm
1 stop19h 05m
$795
BostonBilbao
BOS - BIO
BOSBIO
Boston Logan Intl
Sat 7/4
5:40 pm-4:55 pm
1 stop17h 15m
Bilbao
Mon 7/13
9:35 pm-4:10 pm
1 stop24h 35m
$796
BostonBilbao
BOS - BIO
BOSBIO
Boston Logan Intl
Sat 7/4
9:20 pm-11:15 pm
1 stop19h 55m
Bilbao
Mon 7/13
9:35 pm-4:10 pm
1 stop24h 35m
$796
BostonBilbao
BOS - BIO
BOSBIO
Boston Logan Intl
Fri 5/29
5:10 pm-9:50 am
1 stop10h 40m
Bilbao
Tue 6/9
6:45 am-4:09 pm
2 stops15h 24m
$819
Showing 1-10 of 22 resultsSorted by cheapest first
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 April.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*2 stars |
- Most accurate provider: When it comes to deals on Boston-Bilbao flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Boston-Bilbao flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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.
BOS-BIO
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 April 10, 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 $482). Flying from Boston to Bilbao in July is currently the most expensive (average of $1,028). 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 April 18, 2026.
Read through reviews of airlines operating flights from Boston to Bilbao, such as Delta,KLM, andUnited Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Crew
8.5
Food
7.2
Entertainment
7.8
Comfort
7.9
Boarding
8.1
Overall
7.9
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Crew
8.5
Food
7.2
Entertainment
7.8
Comfort
7.9
Boarding
8.1
Overall
7.9
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Crew
8.5
Food
7.2
Entertainment
7.8
Comfort
7.9
Boarding
8.1
Overall
7.9
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Crew
8.5
Food
7.2
Entertainment
7.8
Comfort
7.9
Boarding
8.1
Overall
7.9
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Crew
8.5
Food
7.2
Entertainment
7.8
Comfort
7.9
Boarding
8.1
Overall
7.9
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Crew
8.5
Food
7.2
Entertainment
7.8
Comfort
7.9
Boarding
8.1
Overall
7.9
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
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.
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Other flights to Bilbao
Explore flights to Bilbao departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on April 18, 2026.
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Boston and Bilbao flights
Browse other Boston and Bilbao flight options. Last updated on April 18, 2026.
Other flights from Boston
Browse through other flights departing from Boston. Flights are based on user searches made on Cheapflights and were last updated on April 18, 2026.
Popular flight searches
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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 April 18, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$386 | Average$575 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$424 | Average$827 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$424 | Average$675 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$453 | Average$840 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$468 | Average$949 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$499 | Average$898 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$516 | Average$768 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$523 | Average$812 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$897 | Average$1,023 | FlexibilityNo cancel fee | On-timeN/A |