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Islip

$444+ Cheap flights from Idaho to Islip, NY (ISP)

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 12/8. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — ISP
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
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Find flight deals from Idaho to Islip

One-way flights from Idaho to Islip
Search for one-way flight options from Idaho to Islip. Find affordable one-way fares based on user searches. Data last updated October 30, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 10/30. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/88:26 pmBOI - ISP
2 stops12h 38mMultiple Airlines
Deal found 10/30$444
This Cheapflightsfares deal was found by Cheapflights users on 10/29. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/66:03 amBOI - ISP
2 stops11h 42mMultiple Airlines
Deal found 10/29$532
This Cheapflightsfares deal was found by Cheapflights users on 10/30. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/186:28 amBOI - ISP
2 stops11h 17mMultiple Airlines
Deal found 10/30$621
This Cheapflightsfares deal was found by Cheapflights users on 10/30. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/249:42 pmBOI - ISP
2 stops11h 22mMultiple Airlines
Deal found 10/30$651
This Cheapflightsfares deal was found by Cheapflights users on 10/30. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/196:28 amBOI - ISP
2 stops11h 17mMultiple Airlines
Deal found 10/30$735
This Cheapflightsfares deal was found by Cheapflights users on 10/30. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/219:50 pmBOI - ISP
2 stops11h 14mMultiple Airlines
Deal found 10/30$749
This Cheapflightsfares deal was found by Cheapflights users on 10/30. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/239:50 pmBOI - ISP
2 stops11h 14mMultiple Airlines
Deal found 10/30$758
This Cheapflightsfares deal was found by Cheapflights users on 10/29. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/279:50 pmBOI - ISP
2 stops11h 14mMultiple Airlines
Deal found 10/29$781
This Cheapflightsfares deal was found by Cheapflights users on 10/29. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/219:42 pmBOI - ISP
2 stops11h 22mMultiple Airlines
Deal found 10/29$840
This Cheapflightsfares deal was found by Cheapflights users on 10/30. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/46:28 amBOI - ISP
2 stops11h 17mMultiple Airlines
Deal found 10/30$988

Cheap flight deals from Idaho to Islip

Keep the following information in mind while searching for Idaho to Islip flight deals. Data was last updated October 30, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$478
(Southwest)

One-way from

$444
(Cheapflightsfares)

Popular in

December

Cheapest in

January

Average price

$366
Provider with most accurate pricing for Boise Air Term. Gowen Fld-New York (NYC) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Boise Air Term. Gowen Fld-New York (NYC) flights.
Search Deals
From Idaho to Islip Long Island
Search Deals
One-way flight from Idaho to Islip Long Island
Search Deals
Highest demand for flights based on searches. 17% potential increase in price ($87 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($21 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Idaho 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 2,558,603 searches. Data last updated October 30, 2025.
Use the filters below to find and compare flights from Idaho to Islip that are best for you.

Fly from

Idaho

Fly to

Islip

Route

Depart

Return

Price

BoiseIslip

BOI - ISP

BOIISP

Boise Air Term. Gowen Fld

Mon 12/8

8:26 pm-11:04 am

2 stops12h 38m

$444

BoiseIslip

BOI - ISP

BOIISP

Boise Air Term. Gowen Fld

Tue 3/24

6:30 am-7:45 pm

2 stops11h 15m

$532

BoiseIslip

BOI - ISP

BOIISP

Boise Air Term. Gowen Fld

Sat 12/6

6:03 am-7:45 pm

2 stops11h 42m

$532

BoiseIslip

BOI - ISP

BOIISP

Boise Air Term. Gowen Fld

Tue 11/18

6:28 am-7:45 pm

2 stops11h 17m

$621

BoiseIslip

BOI - ISP

BOIISP

Boise Air Term. Gowen Fld

Wed 11/19

6:28 am-7:45 pm

2 stops11h 17m

$735

BoiseIslip

BOI - ISP

BOIISP

Boise Air Term. Gowen Fld

Sun 12/21

9:50 pm-11:04 am

2 stops11h 14m

$749

BoiseIslip

BOI - ISP

BOIISP

Boise Air Term. Gowen Fld

Tue 12/23

9:50 pm-11:04 am

2 stops11h 14m

$758

BoiseIslip

BOI - ISP

BOIISP

Boise Air Term. Gowen Fld

Sat 12/27

9:50 pm-11:04 am

2 stops11h 14m

$781

BoiseIslip

BOI - ISP

BOIISP

Boise Air Term. Gowen Fld

Fri 11/21

9:42 pm-11:04 am

2 stops11h 22m

$840

BoiseIslip

BOI - ISP

BOIISP

Boise Air Term. Gowen Fld

Tue 11/4

6:28 am-7:45 pm

2 stops11h 17m

$988

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/30

Best time to book a flight from Idaho to Islip

Have a flexible travel schedule? Discover the best time to fly to Islip from Idaho with our price prediction graph.
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 Idaho to Islip

What is the cheapest month to book a flight from Idaho to Islip, New York?

Currently, September is the cheapest month in which you can book a flight from Idaho to Islip, New York (average of $115). Flying from Idaho to Islip, New York in November is currently the most expensive (average of $276). 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.

Related info for your journey

Find useful and relevant information for your journey from Idaho to Islip. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Islip from Idaho?

    Islip Long Island (ISP) is the airport you will fly into if you book a flight from Idaho to Islip. It is only a 7.2 mi journey from Long Island (ISP) to Islip’s city center.

  • Can I find deals for flights from Idaho to Islip that include hotel bookings?

    Yes. In addition to deals on Idaho to Islip flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Idaho to Islip?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Idaho to Islip.

  • Can I find deals for business class flights from Idaho to Islip?

    Yes. Cheapflights offers flight deals from Idaho to Islip by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Idaho to Islip, New York?

    Currently, September is the cheapest month in which you can book a flight from Idaho to Islip, New York (average of $115). Flying from Idaho to Islip, New York in November is currently the most expensive (average of $276). 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.

See more FAQs

Traveling to a place near Islip?

Book flights to Islip if you plan to visit one of these locations
Riverhead
Southampton

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