$298+ 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 9/15. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — BIO
Aug 25 — Sep 11
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 July 26, 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 July 26, 2026.
This oojo deal was found by Cheapflights users on 7/26. 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 9/28:05 pm
BOS
- BIO
1 stop15h 50m
Lufthansa
Tue 9/87:15 am
BIO
- BOS
2 stops22h 44m
Lufthansa
Deal found 7/26![Lufthansa logo]()
$700
This Mytrip deal was found by Cheapflights users on 7/24. 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.
Sat 9/1911:00 pm
BOS
- BIO
2 stops17h 40m
Multiple Airlines
Sat 9/263:05 pm
BIO
- BOS
3 stops35h 15m
Multiple Airlines
Deal found 7/24![Multiple Airlines logo]()
$705
This United Airlines deal was found by Cheapflights users on 7/23. 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.
Mon 8/248:30 pm
BOS
- BIO
1 stop32h 15m
United Airlines
Fri 9/412:30 pm
BIO
- BOS
2 stops17h 29m
United Airlines
Deal found 7/23![United Airlines logo]()
$706
This Air Canada deal was found by Cheapflights users on 7/23. 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.
Mon 8/246:25 pm
BOS
- BIO
2 stops39h 35m
Air Canada
Tue 9/811:55 am
BIO
- BOS
2 stops36h 12m
Air Canada
Deal found 7/23![Air Canada logo]()
$708
This Cheapflightsfares deal was found by Cheapflights users on 7/26. 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.
Sat 9/1210:45 pm
BOS
- BIO
1 stop13h 20m
TAP AIR PORTUGAL
Fri 9/1812:15 pm
BIO
- BOS
1 stop14h 05m
TAP AIR PORTUGAL
Deal found 7/26![TAP AIR PORTUGAL logo]()
$710
This Air Canada deal was found by Cheapflights users on 7/23. 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.
Mon 8/246:25 pm
BOS
- BIO
2 stops39h 35m
Air Canada
Thu 9/106:50 am
BIO
- BOS
2 stops40h 52m
Air Canada
Deal found 7/23![Air Canada logo]()
$713
This TAP AIR PORTUGAL deal was found by Cheapflights users on 7/25. 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.
Sun 11/2210:45 pm
BOS
- BIO
2 stops13h 50m
TAP AIR PORTUGAL
Wed 11/2512:10 pm
BIO
- BOS
1 stop32h 30m
TAP AIR PORTUGAL
Deal found 7/25![TAP AIR PORTUGAL logo]()
$716
This Mytrip deal was found by Cheapflights users on 7/22. 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.
Sat 10/38:50 pm
BOS
- BIO
2 stops19h 50m
Multiple Airlines
Sat 10/171:50 pm
BIO
- BOS
2 stops35h 00m
Multiple Airlines
Deal found 7/22![Multiple Airlines logo]()
$717
This KLM deal was found by Cheapflights users on 7/22. 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.
Sat 8/155:25 pm
BOS
- BIO
1 stop12h 30m
KLM
Tue 8/258:20 am
BIO
- BOS
1 stop14h 11m
KLM
Deal found 7/22![KLM logo]()
$718
This United Airlines deal was found by Cheapflights users on 7/25. 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.
Sun 9/138:05 pm
BOS
- BIO
1 stop15h 50m
United Airlines
Thu 9/246:50 am
BIO
- BOS
3 stops24h 04m
United Airlines
Deal found 7/25![United Airlines logo]()
$719
This United Airlines deal was found by Cheapflights users on 7/23. 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 9/258:05 pm
BOS
- BIO
1 stop21h 20m
United Airlines
Tue 9/297:15 am
BIO
- BOS
1 stop16h 25m
United Airlines
Deal found 7/23![United Airlines logo]()
$721
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 July 26, 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 July 26, 2026.
This Turkish Airlines deal was found by Cheapflights users on 7/24. 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 Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/229:50 pm
BOS
- BIO
2 stops31h 00m
Multiple Airlines
Tue 11/311:55 am
BIO
- BOS
1 stop37h 10m
Multiple Airlines
Deal found 7/24![Multiple Airlines logo]()
$706
This United Airlines deal was found by Cheapflights users on 7/25. 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.
Sun 9/138:05 pm
BOS
- BIO
1 stop15h 50m
United Airlines
Thu 9/246:50 am
BIO
- BOS
3 stops24h 04m
United Airlines
Deal found 7/25![United Airlines logo]()
$719
This TAP AIR PORTUGAL deal was found by Cheapflights users on 7/26. 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.
Fri 10/1610:45 pm
BOS
- BIO
1 stop12h 50m
TAP AIR PORTUGAL
Sat 10/3112:10 pm
BIO
- BOS
1 stop13h 45m
TAP AIR PORTUGAL
Deal found 7/26![TAP AIR PORTUGAL logo]()
$731
This Delta deal was found by Cheapflights users on 7/26. 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 10/169:20 pm
BOS
- BIO
2 stops30h 30m
Delta
Sat 10/317:10 am
BIO
- BOS
1 stop15h 00m
Delta
Deal found 7/26![Delta logo]()
$773
This United Airlines deal was found by Cheapflights users on 7/24. 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 10/202:15 pm
BOS
- BIO
2 stops21h 40m
United Airlines
Sun 10/256:45 am
BIO
- BOS
2 stops16h 49m
United Airlines
Deal found 7/24![United Airlines logo]()
$744
This United deal was found by Cheapflights users on 7/25. 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 8/112:28 pm
BOS
- BIO
2 stops14h 17m
Multiple Airlines
Mon 8/179:10 pm
BIO
- BOS
1 stop24h 00m
Multiple Airlines
Deal found 7/25![Multiple Airlines logo]()
$747
This oojo deal was found by Cheapflights users on 7/21. 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.
Sat 9/1911:15 pm
BOS
- BIO
2 stops30h 25m
TAP AIR PORTUGAL
Fri 9/2512:15 pm
BIO
- BOS
2 stops38h 05m
TAP AIR PORTUGAL
Deal found 7/21![TAP AIR PORTUGAL logo]()
$780
This Mytrip deal was found by Cheapflights users on 7/21. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/1911:00 pm
BOS
- BIO
2 stops17h 40m
Multiple Airlines
Fri 9/258:00 pm
BIO
- BOS
3 stops32h 40m
Multiple Airlines
Deal found 7/21![Multiple Airlines logo]()
$766
This United Airlines deal was found by Cheapflights users on 7/26. 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.
Sat 8/297:23 pm
BOS
- BIO
2 stops40h 32m
United Airlines
Fri 10/167:15 am
BIO
- BOS
2 stops33h 46m
United Airlines
Deal found 7/26![United Airlines logo]()
$781
Last-minute flights from Boston to BilbaoDiscover last-minute flight deals from Boston to Bilbao. Data last updated July 26, 2026 and is based on user searches.
Discover last-minute flight deals from Boston to Bilbao. Data last updated July 26, 2026 and is based on user searches.
This KLM deal was found by Cheapflights users on 7/24. 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 8/35:25 pm
BOS
- BIO
1 stop16h 30m
KLM
Wed 8/128:20 am
BIO
- BOS
1 stop14h 11m
KLM
Deal found 7/24![KLM logo]()
$733
This Air France deal was found by Cheapflights users on 7/24. 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 8/55:10 pm
BOS
- BIO
1 stop10h 40m
Multiple Airlines
Wed 8/128:20 am
BIO
- BOS
1 stop14h 11m
Multiple Airlines
Deal found 7/24![Multiple Airlines logo]()
$737
This United Airlines deal was found by Cheapflights users on 7/24. 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 8/127:23 pm
BOS
- BIO
2 stops16h 32m
United Airlines
Fri 8/216:45 am
BIO
- BOS
2 stops23h 14m
United Airlines
Deal found 7/24![United Airlines logo]()
$724
This KLM deal was found by Cheapflights users on 7/22. 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.
Sat 8/155:25 pm
BOS
- BIO
1 stop12h 30m
KLM
Tue 8/258:20 am
BIO
- BOS
1 stop14h 11m
KLM
Deal found 7/22![KLM logo]()
$718
This United Airlines deal was found by Cheapflights users on 7/23. 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.
Mon 8/248:30 pm
BOS
- BIO
1 stop32h 15m
United Airlines
Fri 9/412:30 pm
BIO
- BOS
2 stops17h 29m
United Airlines
Deal found 7/23![United Airlines logo]()
$706
This Air Canada deal was found by Cheapflights users on 7/23. 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.
Mon 8/246:25 pm
BOS
- BIO
2 stops39h 35m
Air Canada
Tue 9/811:55 am
BIO
- BOS
2 stops36h 12m
Air Canada
Deal found 7/23![Air Canada logo]()
$708
This Air Canada deal was found by Cheapflights users on 7/23. 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.
Mon 8/246:25 pm
BOS
- BIO
2 stops39h 35m
Air Canada
Thu 9/106:50 am
BIO
- BOS
2 stops40h 52m
Air Canada
Deal found 7/23![Air Canada logo]()
$713
This KAYAK deal was found by Cheapflights users on 7/23. 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 8/245:10 pm
BOS
- BIO
1 stop11h 40m
SWISS
Mon 9/711:55 am
BIO
- BOS
2 stops33h 15m
SWISS
Deal found 7/23![SWISS logo]()
$726
This Delta deal was found by Cheapflights users on 7/23. 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 8/245:10 pm
BOS
- BIO
1 stop10h 40m
Delta
Sun 9/66:45 am
BIO
- BOS
1 stop15h 50m
Delta
Deal found 7/23![Delta logo]()
$732
This Air Canada deal was found by Cheapflights users on 7/23. 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.
Mon 8/246:25 pm
BOS
- BIO
2 stops39h 35m
Air Canada
Mon 9/72:10 pm
BIO
- BOS
2 stops54h 31m
Air Canada
Deal found 7/23![Air Canada logo]()
$736
This Air Canada deal was found by Cheapflights users on 7/23. 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.
Mon 8/246:25 pm
BOS
- BIO
2 stops39h 35m
Air Canada
Fri 9/47:15 am
BIO
- BOS
2 stops32h 35m
Air Canada
Deal found 7/23![Air Canada logo]()
$738
This Mytrip deal was found by Cheapflights users on 7/23. 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 8/308:50 pm
BOS
- BIO
3 stops33h 30m
Multiple Airlines
Wed 9/97:40 am
BIO
- BOS
2 stops18h 40m
Multiple Airlines
Deal found 7/23![Multiple Airlines logo]()
$723
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 July 26, 2026.
Search for one-way flight options from Boston to Bilbao. Find affordable one-way fares based on user searches. Data last updated July 26, 2026.
This Mytrip deal was found by Cheapflights users on 7/22. 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.
Tue 9/158:50 pm
BOS
- BIO
2 stops18h 10m
Multiple Airlines
Deal found 7/22![Multiple Airlines logo]()
$298
This Kiwi.com deal was found by Cheapflights users on 7/23. 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.
Thu 11/127:50 pm
BOS
- BIO
2 stops34h 30m
Multiple Airlines
Deal found 7/23![Multiple Airlines logo]()
$300
This Kiwi.com deal was found by Cheapflights users on 7/23. 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.
Fri 10/98:50 pm
BOS
- BIO
2 stops33h 40m
Multiple Airlines
Deal found 7/23![Multiple Airlines logo]()
$307
This Kiwi.com deal was found by Cheapflights users on 7/26. 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 10/318:50 pm
BOS
- BIO
2 stops20h 05m
Multiple Airlines
Deal found 7/26![Multiple Airlines logo]()
$308
This Kiwi.com deal was found by Cheapflights users on 7/23. 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 10/108:50 pm
BOS
- BIO
2 stops15h 45m
Multiple Airlines
Deal found 7/23![Multiple Airlines logo]()
$309
This Kiwi.com deal was found by Cheapflights users on 7/26. 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 11/17:50 pm
BOS
- BIO
2 stops16h 45m
Multiple Airlines
Deal found 7/26![Multiple Airlines logo]()
$311
This Mytrip deal was found by Cheapflights users on 7/25. 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.
Sat 9/128:50 pm
BOS
- BIO
2 stops15h 40m
Multiple Airlines
Deal found 7/25![Multiple Airlines logo]()
$320
This Kiwi.com deal was found by Cheapflights users on 7/22. 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 8/258:50 pm
BOS
- BIO
3 stops29h 25m
Multiple Airlines
Deal found 7/22![Multiple Airlines logo]()
$321
This Kiwi.com deal was found by Cheapflights users on 7/23. 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 11/117:50 pm
BOS
- BIO
3 stops21h 00m
Multiple Airlines
Deal found 7/23![Multiple Airlines logo]()
$322
This Kiwi.com deal was found by Cheapflights users on 7/23. 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 10/1111:00 pm
BOS
- BIO
3 stops27h 25m
Multiple Airlines
Deal found 7/23![Multiple Airlines logo]()
$328
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 26, 2026.
Most accurate provider | Ovago 3 stars |
|---|---|
Most trusted provider | Ovago 3 stars |
Round-trip from | $700 (oojo) |
One-way from | $296 (Kiwi.com) |
Popular in | July |
Cheapest in | March |
Average price | $1,089 |
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 26, 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
Thu 10/22
9:50 pm-10:50 am
2 stops31h 00m
Bilbao
Tue 11/3
11:55 am-7:05 pm
1 stop37h 10m
$706
BostonBilbao
BOS - BIO
BOSBIO
Boston Logan Intl
Sun 9/13
8:05 pm-5:55 pm
1 stop15h 50m
Bilbao
Thu 9/24
6:50 am-12:54 am
3 stops24h 04m
$719
Quickest round-trip
BostonBilbao
BOS - BIO
BOSBIO
Boston Logan Intl
Fri 10/16
10:45 pm-5:35 pm
1 stop12h 50m
Bilbao
Sat 10/31
12:10 pm-8:55 pm
1 stop13h 45m
$731
BostonBilbao
BOS - BIO
BOSBIO
Boston Logan Intl
Tue 10/20
2:15 pm-5:55 pm
2 stops21h 40m
Bilbao
Sun 10/25
6:45 am-6:34 pm
2 stops16h 49m
$744
BostonBilbao
BOS - BIO
BOSBIO
Boston Logan Intl
Tue 8/11
2:28 pm-10:45 am
2 stops14h 17m
Bilbao
Mon 8/17
9:10 pm-3:10 pm
1 stop24h 00m
$747
BostonBilbao
BOS - BIO
BOSBIO
Boston Logan Intl
Sat 9/19
11:00 pm-10:40 pm
2 stops17h 40m
Bilbao
Fri 9/25
8:00 pm-10:40 pm
3 stops32h 40m
$766
BostonBilbao
BOS - BIO
BOSBIO
Boston Logan Intl
Fri 10/16
9:20 pm-9:50 am
2 stops30h 30m
Bilbao
Sat 10/31
7:10 am-5:10 pm
1 stop15h 00m
$773
BostonBilbao
BOS - BIO
BOSBIO
Boston Logan Intl
Sat 9/19
11:15 pm-11:40 am
2 stops30h 25m
Bilbao
Fri 9/25
12:15 pm-8:20 pm
2 stops38h 05m
$780
BostonBilbao
BOS - BIO
BOSBIO
Boston Logan Intl
Sat 8/29
7:23 pm-5:55 pm
2 stops40h 32m
Bilbao
Fri 10/16
7:15 am-11:01 am
2 stops33h 46m
$781
Cheapest one-way
BostonBilbao
BOS - BIO
BOSBIO
Boston Logan Intl
Sat 10/10
8:50 pm-6:35 pm
2 stops15h 45m
$309
Showing 1-10 of 17 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 July.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- 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.
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?
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 84 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 $1,089). 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?
Airfare is below average for this route at the moment.
Boston to Bilbao flights typically cost between $802 and $1,088 in September.The cheapest round-trip price found within the last 5 days was $700 on Lufthansa (Sep 2-Sep 8).
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 26, 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.
Entertainment
7.2
Boarding
7.8
Crew
8.4
Food
7.3
Overall
7.8
Comfort
7.7
Reviews
1 / 20
4.0
OkaySubhash,Jul 2026
CDG - ATL
Entertainment
7.2
Boarding
7.8
Crew
8.4
Food
7.3
Overall
7.8
Comfort
7.7
Reviews
1 / 20
4.0
OkaySubhash,Jul 2026
CDG - ATL
Entertainment
7.2
Boarding
7.8
Crew
8.4
Food
7.3
Overall
7.8
Comfort
7.7
Reviews
1 / 20
4.0
OkaySubhash,Jul 2026
CDG - ATL
Entertainment
7.2
Boarding
7.8
Crew
8.4
Food
7.3
Overall
7.8
Comfort
7.7
Reviews
1 / 20
4.0
OkaySubhash,Jul 2026
CDG - ATL
Entertainment
7.2
Boarding
7.8
Crew
8.4
Food
7.3
Overall
7.8
Comfort
7.7
Reviews
1 / 20
4.0
OkaySubhash,Jul 2026
CDG - ATL
Entertainment
7.2
Boarding
7.8
Crew
8.4
Food
7.3
Overall
7.8
Comfort
7.7
Reviews
1 / 20
4.0
OkaySubhash,Jul 2026
CDG - 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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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 26, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$390 | Average$660 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$393 | Average$1,055 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$463 | Average$924 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$468 | Average$949 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$495 | Average$897 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$611 | Average$1,046 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$663 | Average$813 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$714 | Average$971 | FlexibilityNo cancel fee | On-time83% | |
| Cheapest$729 | Average$1,010 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$897 | Average$1,023 | FlexibilityNo cancel fee | On-timeN/A |