$163+ Cheap flights from Islip, NY to Boston (ISP - BOS)
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 9/23. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — BOS
Sep 25 — Oct 21
Round-trip
1 adult, Economy
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Find cheap flights from Islip to Boston with Cheapflights
1. Tell us where you want to go
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
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Islip to Boston
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Cheapest flights from Islip to BostonExplore the most affordable flight options available from Islip to Boston. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 26, 2026.
Explore the most affordable flight options available from Islip to Boston. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 26, 2026.
This JetBlue deal was found by Cheapflights users on 8/24. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/224:26 pm -
1 stop6h 52m
Fri 9/252:45 pm -
1 stop8h 37m
Deal found 8/24![JetBlue logo]()
$325
This Southwest deal was found by Cheapflights users on 8/23. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/2110:20 am -
1 stop5h 25m
Tue 9/228:15 am -
1 stop3h 55m
Deal found 8/23![Southwest logo]()
$357
This Southwest deal was found by Cheapflights users on 8/21. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/3010:55 am -
1 stop3h 45m
Thu 10/17:05 am -
2 stops9h 55m
Deal found 8/21![Southwest logo]()
$362
This Southwest deal was found by Cheapflights users on 8/22. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/176:15 am -
1 stop3h 45m
Sun 10/185:35 am -
1 stop4h 45m
Deal found 8/22![Southwest logo]()
$377
This JetBlue deal was found by Cheapflights users on 8/24. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/234:26 pm -
1 stop6h 52m
Thu 9/242:45 pm -
1 stop8h 37m
Deal found 8/24![JetBlue logo]()
$382
This Southwest deal was found by Cheapflights users on 8/25. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/254:05 pm -
1 stop6h 10m
Mon 9/285:50 am -
1 stop3h 50m
Deal found 8/25![Southwest logo]()
$387
This Southwest deal was found by Cheapflights users on 8/21. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/175:40 pm -
1 stop6h 10m
Mon 12/289:15 am -
1 stop7h 05m
Deal found 8/21![Southwest logo]()
$392
This Southwest deal was found by Cheapflights users on 8/22. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/206:20 am -
1 stop3h 45m
Thu 9/245:50 am -
1 stop3h 50m
Deal found 8/22![Southwest logo]()
$393
This Southwest deal was found by Cheapflights users on 8/25. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/246:10 am -
1 stop3h 40m
Mon 9/285:50 am -
1 stop3h 50m
Deal found 8/25![Southwest logo]()
$397
This Kiwi.com deal was found by Cheapflights users on 8/25. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/115:43 pm -
1 stop17h 08m
Mon 9/1411:36 am -
1 stop29h 22m
Deal found 8/25![Frontier logo]()
$402
This Southwest deal was found by Cheapflights users on 8/23. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/95:40 pm -
1 stop6h 25m
Mon 10/129:05 am -
1 stop5h 25m
Deal found 8/23![Southwest logo]()
$403
This Southwest deal was found by Cheapflights users on 8/21. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/216:10 am -
1 stop3h 40m
Sun 9/275:55 am -
1 stop4h 00m
Deal found 8/21![Southwest logo]()
$408
Best flights from Islip to BostonDiscover carefully curated flight deals from Islip to Boston that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 26, 2026.
Discover carefully curated flight deals from Islip to Boston that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 26, 2026.
This Southwest deal was found by Cheapflights users on 8/25. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/25:40 pm -
1 stop3h 40m
Sat 10/33:10 pm -
1 stop6h 35m
Deal found 8/25![Southwest logo]()
$357
This Southwest deal was found by Cheapflights users on 8/23. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/205:35 am -
1 stop4h 05m
Sun 11/227:25 am -
1 stop4h 20m
Deal found 8/23![Southwest logo]()
$357
This Southwest deal was found by Cheapflights users on 8/21. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/3010:55 am -
1 stop3h 45m
Thu 10/17:05 am -
2 stops9h 55m
Deal found 8/21![Southwest logo]()
$362
This Southwest deal was found by Cheapflights users on 8/22. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/176:15 am -
1 stop3h 45m
Sun 10/185:35 am -
1 stop4h 45m
Deal found 8/22![Southwest logo]()
$377
This Southwest deal was found by Cheapflights users on 8/22. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/145:45 am -
2 stops8h 15m
Mon 1/185:35 am -
1 stop6h 25m
Deal found 8/22![Southwest logo]()
$382
This Southwest deal was found by Cheapflights users on 8/25. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/246:10 am -
1 stop3h 40m
Mon 9/285:50 am -
1 stop3h 50m
Deal found 8/25![Southwest logo]()
$397
This Southwest deal was found by Cheapflights users on 8/24. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/216:10 am -
1 stop6h 20m
Mon 9/287:40 am -
1 stop4h 55m
Deal found 8/24![Southwest logo]()
$397
This Southwest deal was found by Cheapflights users on 8/23. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/1810:20 am -
1 stop5h 25m
Sun 9/205:55 am -
1 stop4h 00m
Deal found 8/23![Southwest logo]()
$397
This Southwest deal was found by Cheapflights users on 8/23. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/206:20 am -
1 stop3h 45m
Mon 9/215:50 am -
1 stop3h 50m
Deal found 8/23![Southwest logo]()
$397
This Southwest deal was found by Cheapflights users on 8/21. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/216:10 am -
1 stop3h 40m
Sun 9/275:55 am -
1 stop4h 00m
Deal found 8/21![Southwest logo]()
$408
Last-minute flights from Islip to BostonDiscover last-minute flight deals from Islip to Boston. Data last updated August 26, 2026 and is based on user searches.
Discover last-minute flight deals from Islip to Boston. Data last updated August 26, 2026 and is based on user searches.
This Southwest deal was found by Cheapflights users on 8/21. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/106:10 am -
1 stop6h 20m
Sat 9/125:50 am -
1 stop6h 15m
Deal found 8/21![Southwest logo]()
$428
This Kiwi.com deal was found by Cheapflights users on 8/25. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/115:43 pm -
1 stop17h 08m
Mon 9/1411:36 am -
1 stop29h 22m
Deal found 8/25![Frontier logo]()
$402
This Southwest deal was found by Cheapflights users on 8/22. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/206:20 am -
1 stop3h 45m
Thu 9/245:50 am -
1 stop3h 50m
Deal found 8/22![Southwest logo]()
$393
This Southwest deal was found by Cheapflights users on 8/23. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/2110:20 am -
1 stop5h 25m
Tue 9/228:15 am -
1 stop3h 55m
Deal found 8/23![Southwest logo]()
$357
This Southwest deal was found by Cheapflights users on 8/21. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/216:10 am -
1 stop3h 40m
Sun 9/275:55 am -
1 stop4h 00m
Deal found 8/21![Southwest logo]()
$408
This JetBlue deal was found by Cheapflights users on 8/24. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/224:26 pm -
1 stop6h 52m
Fri 9/252:45 pm -
1 stop8h 37m
Deal found 8/24![JetBlue logo]()
$325
This JetBlue deal was found by Cheapflights users on 8/24. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/234:26 pm -
1 stop6h 52m
Thu 9/242:45 pm -
1 stop8h 37m
Deal found 8/24![JetBlue logo]()
$382
This Southwest deal was found by Cheapflights users on 8/25. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/246:10 am -
1 stop3h 40m
Mon 9/285:50 am -
1 stop3h 50m
Deal found 8/25![Southwest logo]()
$397
This Southwest deal was found by Cheapflights users on 8/25. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/254:05 pm -
1 stop6h 10m
Mon 9/285:50 am -
1 stop3h 50m
Deal found 8/25![Southwest logo]()
$387
This Southwest deal was found by Cheapflights users on 8/21. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/3010:55 am -
1 stop3h 45m
Thu 10/17:05 am -
2 stops9h 55m
Deal found 8/21![Southwest logo]()
$362
This FlightHub deal was found by Cheapflights users on 8/21. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/302:16 pm -
Nonstop1h 25m
Thu 10/12:45 pm -
1 stop8h 37m
Deal found 8/21![Multiple Airlines logo]()
$416
One-way flights from Islip to BostonSearch for one-way flight options from Islip to Boston. Find affordable one-way fares based on user searches. Data last updated August 26, 2026.
Search for one-way flight options from Islip to Boston. Find affordable one-way fares based on user searches. Data last updated August 26, 2026.
This JetBlue deal was found by Cheapflights users on 8/22. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/234:26 pm -
1 stop6h 52m
Deal found 8/22![JetBlue logo]()
$163
This Southwest deal was found by Cheapflights users on 8/21. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/2210:55 am -
1 stop5h 05m
Deal found 8/21![Southwest logo]()
$179
This Southwest deal was found by Cheapflights users on 8/25. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/95:40 pm -
1 stop6h 25m
Deal found 8/25![Southwest logo]()
$189
This Kiwi.com deal was found by Cheapflights users on 8/21. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/2312:00 pm -
2 stops22h 22m
Deal found 8/21![Multiple Airlines logo]()
$197
This Southwest deal was found by Cheapflights users on 8/22. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/176:10 am -
1 stop3h 40m
Deal found 8/22![Southwest logo]()
$199
This JetBlue deal was found by Cheapflights users on 8/22. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/124:26 pm -
1 stop7h 37m
Deal found 8/22![JetBlue logo]()
$220
This Kiwi.com deal was found by Cheapflights users on 8/21. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/205:43 pm -
2 stops42h 24m
Deal found 8/21![Frontier logo]()
$238
This Booking.com deal was found by Cheapflights users on 8/25. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/202:19 pm -
Nonstop1h 27m
Deal found 8/25![Cape Air logo]()
$242
This Booking.com deal was found by Cheapflights users on 8/24. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/210:05 am -
Nonstop1h 25m
Deal found 8/24![Cape Air logo]()
$243
This Booking.com deal was found by Cheapflights users on 8/25. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/277:05 am -
Nonstop1h 25m
Deal found 8/25![Cape Air logo]()
$244
This Gotogate deal was found by Cheapflights users on 8/25. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/84:50 pm -
Nonstop1h 25m
Deal found 8/25![Cape Air logo]()
$249
Find flight deals from Islip to Boston
Discover tips and strategies to find the most affordable flight options for your journey from Islip (ISP) to Boston (BOS). 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 August 26, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $325 (JetBlue) |
One-way from | $163 (JetBlue) |
Popular in | July |
Cheapest in | June |
Average price | $564 |
Good round-trip deal | $594 or less |
Good one-way deal | $260 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Islip to Boston 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 7,457,451 searches. Data last updated August 26, 2026.
Use the filters below to find and compare flights from Islip to Boston that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
IslipBoston
ISP Islip Long Island - BOS Boston Logan Intl
ISPBOS
Islip Long Island
Fri 10/2
5:40 pm-9:20 pm
1 stop3h 40m
Boston Logan Intl
Sat 10/3
3:10 pm-9:45 pm
1 stop6h 35m
$357
IslipBoston
ISP Islip Long Island - BOS Boston Logan Intl
ISPBOS
Islip Long Island
Fri 11/20
5:35 am-9:40 am
1 stop4h 05m
Boston Logan Intl
Sun 11/22
7:25 am-11:45 am
1 stop4h 20m
$357
IslipBoston
ISP Islip Long Island - BOS Boston Logan Intl
ISPBOS
Islip Long Island
Wed 9/30
10:55 am-2:40 pm
1 stop3h 45m
Boston Logan Intl
Thu 10/1
7:05 am-5:00 pm
2 stops9h 55m
$362
IslipBoston
ISP Islip Long Island - BOS Boston Logan Intl
ISPBOS
Islip Long Island
Sat 10/17
6:15 am-10:00 am
1 stop3h 45m
Boston Logan Intl
Sun 10/18
5:35 am-10:20 am
1 stop4h 45m
$377
IslipBoston
ISP Islip Long Island - BOS Boston Logan Intl
ISPBOS
Islip Long Island
Thu 1/14
5:45 am-2:00 pm
2 stops8h 15m
Boston Logan Intl
Mon 1/18
5:35 am-12:00 pm
1 stop6h 25m
$382
Quickest round-trip
IslipBoston
ISP Islip Long Island - BOS Boston Logan Intl
ISPBOS
Islip Long Island
Thu 9/24
6:10 am-9:50 am
1 stop3h 40m
Boston Logan Intl
Mon 9/28
5:50 am-9:40 am
1 stop3h 50m
$397
IslipBoston
ISP Islip Long Island - BOS Boston Logan Intl
ISPBOS
Islip Long Island
Mon 9/21
6:10 am-12:30 pm
1 stop6h 20m
Boston Logan Intl
Mon 9/28
7:40 am-12:35 pm
1 stop4h 55m
$397
IslipBoston
ISP Islip Long Island - BOS Boston Logan Intl
ISPBOS
Islip Long Island
Fri 9/18
10:20 am-3:45 pm
1 stop5h 25m
Boston Logan Intl
Sun 9/20
5:55 am-9:55 am
1 stop4h 00m
$397
IslipBoston
ISP Islip Long Island - BOS Boston Logan Intl
ISPBOS
Islip Long Island
Sun 9/20
6:20 am-10:05 am
1 stop3h 45m
Boston Logan Intl
Mon 9/21
5:50 am-9:40 am
1 stop3h 50m
$397
IslipBoston
ISP Islip Long Island - BOS Boston Logan Intl
ISPBOS
Islip Long Island
Mon 9/21
6:10 am-9:50 am
1 stop3h 40m
Boston Logan Intl
Sun 9/27
5:55 am-9:55 am
1 stop4h 00m
$408
Showing 1-10 of 22 resultsSorted by cheapest first
Compare providers for flights from Islip to Boston
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 Islip to Boston in August.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Islip, New York-Boston flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Islip, New York-Boston flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Islip, New York-Boston flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Islip, New York-Boston 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 Islip, New York-Boston 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 Islip to Boston
Have a flexible travel schedule? Discover the best time to fly to Boston from Islip with our price prediction graph.
ISP-BOS
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 Islip to Boston
What is the cheapest time of day to fly from ISP to BOS?
Find hourly flight availability from Islip to Boston. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 26, 2026.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Islip, New York to Boston as you normally would.
How much does it cost to fly round-trip from Islip, New York to Boston?
Airfare is below average for this route at the moment.
Islip, New York to Boston flights typically cost between $520 and $617 in September.The cheapest round-trip price found within the last 5 days was $325 on JetBlue (Sep 22-Sep 25).
Reviews of airlines servicing Boston
Get insights into the airlines that provide service to Boston. 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 Boston. Reviews last updated August 26, 2026.
See what other customers who have flown with Cape Air from Islip to Boston have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Related info for your journey
Find useful and relevant information for your journey from Islip to Boston. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near Boston?
Book flights to Boston if you plan to visit one of these locationsWaltham
Randolph
Concord
Cambridge
Brockton
Seekonk
Cranston
Dedham
Warwick
Peabody
Auburn
Chelsea
York Beach
Londonderry
Revere
Fitchburg
Swansea
North Falmouth
Braintree
Sandwich
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Top airline flying from Islip to Boston
Discover the top airline that operate flights from Islip to Boston. 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 7,457,451 searches. Data last updated August 26, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$497 | Average$559 | FlexibilityNo cancel fee | On-time63% |