$254+ Cheap flights from Boise to Islip, NY (BOI - ISP)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/13. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — ISP
Oct 10 — Oct 171
Round-trip
1 adult, Economy
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Best
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One-way
Cheapest flights from Boise to IslipExplore the most affordable flight options available from Boise to Islip. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 10, 2026.
Explore the most affordable flight options available from Boise to Islip. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 10, 2026.
This Southwest deal was found by Cheapflights users on 9/8. 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 10/811:20 am -
2 stops10h 20m
Mon 10/123:10 pm -
2 stops12h 35m
Deal found 9/8![Southwest logo]()
$712
Best flights from Boise to IslipDiscover carefully curated flight deals from Boise to Islip that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 10, 2026.
Discover carefully curated flight deals from Boise to Islip that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 10, 2026.
This Southwest deal was found by Cheapflights users on 9/8. 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 10/811:20 am -
2 stops10h 20m
Mon 10/123:10 pm -
2 stops12h 35m
Deal found 9/8![Southwest logo]()
$712
Last-minute flights from Boise to IslipDiscover last-minute flight deals from Boise to Islip. Data last updated September 10, 2026 and is based on user searches.
Discover last-minute flight deals from Boise to Islip. Data last updated September 10, 2026 and is based on user searches.
This Southwest deal was found by Cheapflights users on 9/8. 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 10/811:20 am -
2 stops10h 20m
Mon 10/123:10 pm -
2 stops12h 35m
Deal found 9/8![Southwest logo]()
$712
One-way flights from Boise to IslipSearch for one-way flight options from Boise to Islip. Find affordable one-way fares based on user searches. Data last updated September 10, 2026.
Search for one-way flight options from Boise to Islip. Find affordable one-way fares based on user searches. Data last updated September 10, 2026.
This Southwest deal was found by Cheapflights users on 9/9. 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 10/136:35 am -
2 stops14h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![Southwest logo]()
$254
This Kiwi.com deal was found by Cheapflights users on 9/9. 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 10/92:50 pm -
3 stops41h 27m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![Multiple Airlines logo]()
$351
This Southwest deal was found by Cheapflights users on 9/9. 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 10/912:00 pm -
2 stops9h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![Southwest logo]()
$364
This Kiwi.com deal was found by Cheapflights users on 9/9. 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 10/132:06 pm -
3 stops48h 04m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![Multiple Airlines logo]()
$644
Find flight deals from Boise to Islip
Discover tips and strategies to find the most affordable flight options for your journey from Boise (BOI) to Islip (ISP). 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 September 10, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $712 (Southwest) |
One-way from | $254 (Southwest) |
Popular in | December |
Cheapest in | September |
Average price | $326 |
Cheapflights Fare Finder
Customize your flight search to find flights from Boise to Islip 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 September 10, 2026.
Use the filters below to find and compare flights from Boise to Islip that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
BoiseIslip
BOI Boise Air Term. Gowen Fld - ISP Islip Long Island
BOIISP
Boise Air Term. Gowen Fld
Tue 10/13
6:35 am-10:40 pm
2 stops14h 05m
Islip Long Island
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$254
BoiseIslip
BOI Boise Air Term. Gowen Fld - ISP Islip Long Island
BOIISP
Boise Air Term. Gowen Fld
Fri 10/9
2:50 pm-10:17 am
3 stops41h 27m
Islip Long Island
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$351
Quickest round-trip
BoiseIslip
BOI Boise Air Term. Gowen Fld - ISP Islip Long Island
BOIISP
Boise Air Term. Gowen Fld
Fri 10/9
12:00 pm-11:40 pm
2 stops9h 40m
Islip Long Island
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$364
BoiseIslip
BOI Boise Air Term. Gowen Fld - ISP Islip Long Island
BOIISP
Boise Air Term. Gowen Fld
Tue 10/13
2:06 pm-4:10 pm
3 stops48h 04m
Islip Long Island
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$644
BoiseIslip
BOI Boise Air Term. Gowen Fld - ISP Islip Long Island
BOIISP
Boise Air Term. Gowen Fld
Thu 10/8
11:20 am-11:40 pm
2 stops10h 20m
Islip Long Island
Mon 10/12
3:10 pm-1:45 am
2 stops12h 35m
$712
Sorted by cheapest first
- Most accurate provider: When it comes to deals on Boise-Islip, New York flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Boise-Islip, New York flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Boise-Islip, New York flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Boise-Islip, New York 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 Boise-Islip, New York 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 Boise to Islip
Have a flexible travel schedule? Discover the best time to fly to Islip from Boise with our price prediction graph.
BOI-ISP
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.
Related info for your journey
Find useful and relevant information for your journey from Boise to Islip. 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 Islip?
Book flights to Islip if you plan to visit one of these locationsRiverhead
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