$252+ 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 4/27. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — BIO
May 3 — May 101
Round-trip
1 adult, Economy
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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 3, 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 3, 2026.
This Justfly.com deal was found by Cheapflights users on 3/31. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/15:40 pm
BOS
- BIO
1 stop19h 05m
Scandinavian Airlines
Wed 9/237:35 pm
BIO
- BOS
1 stop26h 00m
Scandinavian Airlines
Deal found 3/31![Scandinavian Airlines logo]()
$549
This Kiwi.com deal was found by Cheapflights users on 3/29. 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 5/810:50 pm
BOS
- BIO
1 stop27h 25m
LEVEL
Wed 5/272:25 pm
BIO
- BOS
1 stop12h 40m
LEVEL
Deal found 3/29![LEVEL logo]()
$563
This oojo deal was found by Cheapflights users on 3/29. 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.
Mon 3/3010:30 pm
BOS
- BIO
2 stops13h 30m
TAP AIR PORTUGAL
Wed 4/812:25 pm
BIO
- BOS
1 stop13h 55m
TAP AIR PORTUGAL
Deal found 3/29![TAP AIR PORTUGAL logo]()
$566
This KAYAK deal was found by Cheapflights users on 3/31. 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.
Tue 9/15:40 pm
BOS
- BIO
1 stop19h 05m
Scandinavian Airlines
Fri 9/257:35 pm
BIO
- BOS
1 stop26h 00m
Scandinavian Airlines
Deal found 3/31![Scandinavian Airlines logo]()
$571
This Turkish Airlines deal was found by Cheapflights users on 4/1. 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.
Mon 10/59:50 pm
BOS
- BIO
1 stop37h 30m
Turkish Airlines
Wed 10/146:20 pm
BIO
- BOS
1 stop31h 35m
Turkish Airlines
Deal found 4/1![Turkish Airlines logo]()
$572
This Cheapflightsfares deal was found by Cheapflights users on 3/31. 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.
Wed 4/228:05 pm
BOS
- BIO
1 stop21h 20m
Lufthansa
Wed 4/297:15 am
BIO
- BOS
1 stop16h 25m
Lufthansa
Deal found 3/31![Lufthansa logo]()
$579
This Kiwi.com deal was found by Cheapflights users on 3/29. 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 5/910:50 pm
BOS
- BIO
1 stop27h 25m
LEVEL
Wed 5/272:25 pm
BIO
- BOS
1 stop12h 40m
LEVEL
Deal found 3/29![LEVEL logo]()
$586
This Gotogate deal was found by Cheapflights users on 4/3. 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.
Mon 4/279:50 pm
BOS
- BIO
1 stop37h 30m
Turkish Airlines
Tue 5/1212:10 pm
BIO
- BOS
1 stop37h 45m
Turkish Airlines
Deal found 4/3![Turkish Airlines logo]()
$592
This KLM deal was found by Cheapflights users on 4/1. 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 10/45:35 pm
BOS
- BIO
1 stop16h 20m
KLM
Tue 10/138:20 am
BIO
- BOS
1 stop14h 20m
KLM
Deal found 4/1![KLM logo]()
$594
This Turkish Airlines deal was found by Cheapflights users on 3/29. 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.
Wed 10/79:50 pm
BOS
- BIO
1 stop31h 20m
Multiple Airlines
Tue 10/1310:50 pm
BIO
- BOS
2 stops27h 05m
Multiple Airlines
Deal found 3/29![Multiple Airlines logo]()
$596
This FlightHub deal was found by Cheapflights users on 3/29. 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.
Thu 10/89:50 pm
BOS
- BIO
1 stop31h 20m
Turkish Airlines
Tue 10/1312:10 pm
BIO
- BOS
1 stop37h 45m
Turkish Airlines
Deal found 3/29![Turkish Airlines logo]()
$597
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 3, 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 3, 2026.
This United Airlines deal was found by Cheapflights users on 4/2. 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 5/183:32 pm
BOS
- BIO
2 stops18h 28m
United Airlines
Mon 5/252:10 pm
BIO
- BOS
2 stops33h 47m
United Airlines
Deal found 4/2![United Airlines logo]()
$713
This KLM deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/305:25 pm
BOS
- BIO
1 stop12h 30m
KLM
Wed 7/88:20 am
BIO
- BOS
1 stop14h 14m
KLM
Deal found 3/31![KLM logo]()
$794
This Delta deal was found by Cheapflights users on 4/2. 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 6/14:40 pm
BOS
- BIO
1 stop12h 35m
Delta
Mon 6/87:10 am
BIO
- BOS
2 stops18h 04m
Delta
Deal found 4/2![Delta logo]()
$899
This United Airlines deal was found by Cheapflights users on 3/31. 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.
Thu 9/38:05 pm
BOS
- BIO
1 stop15h 50m
United Airlines
Sun 9/207:15 am
BIO
- BOS
1 stop16h 25m
United Airlines
Deal found 3/31![United Airlines logo]()
$746
This KLM deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/215:20 pm
BOS
- BIO
1 stop12h 35m
KLM
Sun 7/268:20 am
BIO
- BOS
1 stop14h 14m
KLM
Deal found 3/30![KLM logo]()
$794
This United Airlines deal was found by Cheapflights users on 3/29. 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 8/410:00 pm
BOS
- BIO
1 stop19h 05m
United Airlines
Wed 8/196:50 am
BIO
- BOS
1 stop14h 50m
United Airlines
Deal found 3/29![United Airlines logo]()
$767
This Delta deal was found by Cheapflights users on 4/2. 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 6/307:00 pm
BOS
- BIO
1 stop16h 30m
Delta
Wed 7/87:10 am
BIO
- BOS
2 stops18h 06m
Delta
Deal found 4/2![Delta logo]()
$934
This United Airlines deal was found by Cheapflights users on 3/29. 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 5/262:40 pm
BOS
- BIO
2 stops20h 30m
United Airlines
Sun 5/3112:30 pm
BIO
- BOS
1 stop11h 27m
United Airlines
Deal found 3/29![United Airlines logo]()
$801
This United Airlines deal was found by Cheapflights users on 3/29. 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 8/910:00 pm
BOS
- BIO
1 stop19h 25m
United Airlines
Wed 8/196:50 am
BIO
- BOS
1 stop14h 50m
United Airlines
Deal found 3/29![United Airlines logo]()
$848
This United Airlines deal was found by Cheapflights users on 4/2. 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 5/175:45 pm
BOS
- BIO
2 stops23h 40m
United Airlines
Sun 5/246:50 am
BIO
- BOS
2 stops18h 24m
United Airlines
Deal found 4/2![United Airlines logo]()
$990
Last-minute flights from Boston to BilbaoDiscover last-minute flight deals from Boston to Bilbao. Data last updated April 3, 2026 and is based on user searches.
Discover last-minute flight deals from Boston to Bilbao. Data last updated April 3, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 4/2. 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 4/147:30 pm
BOS
- BIO
2 stops21h 55m
United Airlines
Tue 4/287:15 am
BIO
- BOS
1 stop16h 25m
United Airlines
Deal found 4/2![United Airlines logo]()
$611
This Delta deal was found by Cheapflights users on 4/2. 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 4/1411:15 am
BOS
- BIO
2 stops16h 35m
Delta
Tue 4/286:45 am
BIO
- BOS
2 stops16h 19m
Delta
Deal found 4/2![Delta logo]()
$622
This Cheapflightsfares deal was found by Cheapflights users on 3/31. 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.
Wed 4/228:05 pm
BOS
- BIO
1 stop21h 20m
Lufthansa
Wed 4/297:15 am
BIO
- BOS
1 stop16h 25m
Lufthansa
Deal found 3/31![Lufthansa logo]()
$579
This Gotogate deal was found by Cheapflights users on 4/3. 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.
Mon 4/279:50 pm
BOS
- BIO
1 stop37h 30m
Turkish Airlines
Tue 5/1212:10 pm
BIO
- BOS
1 stop37h 45m
Turkish Airlines
Deal found 4/3![Turkish Airlines logo]()
$592
This TAP AIR PORTUGAL deal was found by Cheapflights users on 4/3. 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.
Mon 4/2710:30 pm
BOS
- BIO
2 stops13h 30m
TAP AIR PORTUGAL
Tue 5/126:50 pm
BIO
- BOS
1 stop31h 30m
TAP AIR PORTUGAL
Deal found 4/3![TAP AIR PORTUGAL logo]()
$603
This Kiwi.com deal was found by Cheapflights users on 3/29. 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 5/810:50 pm
BOS
- BIO
1 stop27h 25m
LEVEL
Wed 5/272:25 pm
BIO
- BOS
1 stop12h 40m
LEVEL
Deal found 3/29![LEVEL logo]()
$563
This Kiwi.com deal was found by Cheapflights users on 3/29. 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 5/810:50 pm
BOS
- BIO
1 stop27h 25m
LEVEL
Fri 5/297:00 am
BIO
- BOS
1 stop20h 05m
LEVEL
Deal found 3/29![LEVEL logo]()
$609
This Kiwi.com deal was found by Cheapflights users on 3/29. 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 5/910:50 pm
BOS
- BIO
1 stop27h 25m
LEVEL
Wed 5/272:25 pm
BIO
- BOS
1 stop12h 40m
LEVEL
Deal found 3/29![LEVEL logo]()
$586
This Kiwi.com deal was found by Cheapflights users on 3/29. 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 5/910:50 pm
BOS
- BIO
1 stop27h 25m
LEVEL
Thu 5/287:00 am
BIO
- BOS
1 stop20h 05m
LEVEL
Deal found 3/29![LEVEL logo]()
$615
This Kiwi.com deal was found by Cheapflights users on 3/31. 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 5/109:40 pm
BOS
- BIO
1 stop14h 55m
SWISS
Thu 5/288:45 pm
BIO
- BOS
1 stop24h 25m
SWISS
Deal found 3/31![SWISS logo]()
$600
This KLM deal was found by Cheapflights users on 4/2. 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 5/105:25 pm
BOS
- BIO
1 stop12h 30m
KLM
Fri 5/228:20 am
BIO
- BOS
1 stop14h 13m
KLM
Deal found 4/2![KLM logo]()
$624
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 3, 2026.
Search for one-way flight options from Boston to Bilbao. Find affordable one-way fares based on user searches. Data last updated April 3, 2026.
This Kiwi.com deal was found by Cheapflights users on 4/2. 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 4/278:50 pm
BOS
- BIO
3 stops42h 10m
Multiple Airlines
Deal found 4/2![Multiple Airlines logo]()
$252
This Iberia deal was found by Cheapflights users on 3/29. 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 5/710:50 pm
BOS
- BIO
1 stop27h 25m
Iberia
Deal found 3/29![Iberia logo]()
$295
This Iberia deal was found by Cheapflights users on 3/29. 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 8/611:00 pm
BOS
- BIO
1 stop27h 15m
Iberia
Deal found 3/29![Iberia logo]()
$334
This Iberia deal was found by Cheapflights users on 3/29. 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.
Sun 8/211:50 pm
BOS
- BIO
1 stop16h 45m
Iberia
Deal found 3/29![Iberia logo]()
$340
This LEVEL deal was found by Cheapflights users on 4/2. 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.
Mon 4/2710:50 pm
BOS
- BIO
1 stop18h 10m
LEVEL
Deal found 4/2![LEVEL logo]()
$364
This Kiwi.com deal was found by Cheapflights users on 3/29. 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 5/2610:50 pm
BOS
- BIO
1 stop27h 25m
LEVEL
Deal found 3/29![LEVEL logo]()
$367
This Kiwi.com deal was found by Cheapflights users on 4/3. 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 6/2210:05 am
BOS
- BIO
3 stops31h 05m
Multiple Airlines
Deal found 4/3![Multiple Airlines logo]()
$369
This Kiwi.com deal was found by Cheapflights users on 3/29. 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 5/2610:05 am
BOS
- BIO
3 stops28h 55m
Multiple Airlines
Deal found 3/29![Multiple Airlines logo]()
$370
This Kiwi.com deal was found by Cheapflights users on 4/1. 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 6/910:50 pm
BOS
- BIO
1 stop17h 35m
LEVEL
Deal found 4/1![LEVEL logo]()
$371
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 3, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $549 (Justfly.com) |
One-way from | $252 (Kiwi.com) |
Popular in | July |
Cheapest in | October |
Average price | $597 |
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 3, 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 5/18
3:32 pm-4:00 pm
2 stops18h 28m
Bilbao
Mon 5/25
2:10 pm-5:57 pm
2 stops33h 47m
$713
BostonBilbao
BOS - BIO
BOSBIO
Boston Logan Intl
Thu 9/3
8:05 pm-5:55 pm
1 stop15h 50m
Bilbao
Sun 9/20
7:15 am-5:40 pm
1 stop16h 25m
$746
BostonBilbao
BOS - BIO
BOSBIO
Boston Logan Intl
Tue 8/4
10:00 pm-11:05 pm
1 stop19h 05m
Bilbao
Wed 8/19
6:50 am-3:40 pm
1 stop14h 50m
$767
Quickest round-trip
BostonBilbao
BOS - BIO
BOSBIO
Boston Logan Intl
Tue 6/30
5:25 pm-11:55 am
1 stop12h 30m
Bilbao
Wed 7/8
8:20 am-4:34 pm
1 stop14h 14m
$794
BostonBilbao
BOS - BIO
BOSBIO
Boston Logan Intl
Tue 7/21
5:20 pm-11:55 am
1 stop12h 35m
Bilbao
Sun 7/26
8:20 am-4:34 pm
1 stop14h 14m
$794
BostonBilbao
BOS - BIO
BOSBIO
Boston Logan Intl
Tue 5/26
2:40 pm-5:10 pm
2 stops20h 30m
Bilbao
Sun 5/31
12:30 pm-5:57 pm
1 stop11h 27m
$801
BostonBilbao
BOS - BIO
BOSBIO
Boston Logan Intl
Sun 8/9
10:00 pm-11:25 pm
1 stop19h 25m
Bilbao
Wed 8/19
6:50 am-3:40 pm
1 stop14h 50m
$848
BostonBilbao
BOS - BIO
BOSBIO
Boston Logan Intl
Mon 6/1
4:40 pm-11:15 am
1 stop12h 35m
Bilbao
Mon 6/8
7:10 am-7:14 pm
2 stops18h 04m
$899
BostonBilbao
BOS - BIO
BOSBIO
Boston Logan Intl
Tue 6/30
7:00 pm-5:30 pm
1 stop16h 30m
Bilbao
Wed 7/8
7:10 am-7:16 pm
2 stops18h 06m
$934
BostonBilbao
BOS - BIO
BOSBIO
Boston Logan Intl
Sun 5/17
5:45 pm-11:25 pm
2 stops23h 40m
Bilbao
Sun 5/24
6:50 am-7:14 pm
2 stops18h 24m
$990
Showing 1-10 of 21 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 2, 2026.
The price you pay for your flight from Boston to Bilbao may vary depending on when you book. For the best chance of a lower fare, look to book 57 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
What is the cheapest month to book a flight from Boston to Bilbao?
Currently, March is the cheapest month in which you can book a flight from Boston to Bilbao (average of $345). Flying from Boston to Bilbao in July is currently the most expensive (average of $561). 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 3, 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.
Comfort
7.9
Overall
7.9
Food
7.2
Crew
8.5
Boarding
8.1
Entertainment
7.8
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Comfort
7.9
Overall
7.9
Food
7.2
Crew
8.5
Boarding
8.1
Entertainment
7.8
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Comfort
7.9
Overall
7.9
Food
7.2
Crew
8.5
Boarding
8.1
Entertainment
7.8
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Comfort
7.9
Overall
7.9
Food
7.2
Crew
8.5
Boarding
8.1
Entertainment
7.8
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Comfort
7.9
Overall
7.9
Food
7.2
Crew
8.5
Boarding
8.1
Entertainment
7.8
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Comfort
7.9
Overall
7.9
Food
7.2
Crew
8.5
Boarding
8.1
Entertainment
7.8
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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Boston and Bilbao flights
Browse other Boston and Bilbao flight options. Last updated on April 3, 2026.
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Browse through other flights departing from Boston. Flights are based on user searches made on Cheapflights and were last updated on April 3, 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 3, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$381 | Average$568 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$424 | Average$804 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$439 | Average$657 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$453 | Average$790 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$468 | Average$815 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$499 | Average$761 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$516 | Average$768 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$523 | Average$797 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$897 | Average$1,023 | FlexibilityNo cancel fee | On-timeN/A |