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Islip

$458+ Cheap flights from Idaho to Islip (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 11/19. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — ISP
oct. 11 — oct. 181
sáb. 10/11
sáb. 10/18
1 adult, Economy
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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 septiembre 11, 2025.

Round-trip from

$795
(Cheapflightsfares)

One-way from

$458
(Cheapflightsfares)

Popular in

December

Cheapest in

April

Average price

$397
From Idaho to Islip Long Island
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One-way flight from Idaho to Islip Long Island
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Highest demand for flights based on searches. 18% potential increase in price ($90 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($17 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Idaho to Islip

Cheapest flights from Idaho to Islip
Explore the most affordable flight options available from Idaho to Islip. Find the lowest fares from popular airlines and budget airlines, with prices last updated on septiembre 11, 2025.

This Cheapflightsfares 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 11/108:50 pmBOI - ISP
2 stops12h 08mMultiple Airlines
lun. 11/172:19 pmISP - BOI
2 stops11h 40mMultiple Airlines
Deal found 9/9$795
This Cheapflightsfares deal was found by Cheapflights users on 9/11. 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.
vie. 11/146:28 amBOI - ISP
2 stops11h 33mMultiple Airlines
mar. 11/182:19 pmISP - BOI
2 stops11h 40mMultiple Airlines
Deal found 9/11$845
This Cheapflightsfares deal was found by Cheapflights users on 9/10. 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.
lun. 11/108:50 pmBOI - ISP
2 stops12h 08mMultiple Airlines
vie. 11/142:19 pmISP - BOI
2 stops11h 40mMultiple Airlines
Deal found 9/10$913
This Cheapflightsfares 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 10/316:28 amBOI - ISP
2 stops11h 33mMultiple Airlines
lun. 11/32:19 pmISP - BOI
2 stops11h 40mMultiple Airlines
Deal found 9/9$918
This Cheapflightsfares deal was found by Cheapflights users on 9/10. 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.
mar. 11/116:28 amBOI - ISP
2 stops11h 33mMultiple Airlines
mar. 11/182:19 pmISP - BOI
2 stops11h 40mMultiple Airlines
Deal found 9/10$953
This Cheapflightsfares deal was found by Cheapflights users on 9/10. 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.
lun. 11/108:50 pmBOI - ISP
2 stops12h 08mMultiple Airlines
sáb. 11/152:19 pmISP - BOI
2 stops11h 40mMultiple Airlines
Deal found 9/10$959
This Cheapflightsfares deal was found by Cheapflights users on 9/10. 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.
vie. 11/78:50 pmBOI - ISP
2 stops12h 08mMultiple Airlines
dom. 11/92:19 pmISP - BOI
2 stops11h 40mMultiple Airlines
Deal found 9/10$1,021
This Cheapflightsfares deal was found by Cheapflights users on 9/10. 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.
mié. 11/126:28 amBOI - ISP
2 stops11h 33mMultiple Airlines
vie. 11/142:19 pmISP - BOI
2 stops11h 40mMultiple Airlines
Deal found 9/10$1,039
This Cheapflightsfares deal was found by Cheapflights users on 9/10. 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.
mié. 10/296:28 amBOI - ISP
2 stops11h 33mMultiple Airlines
mié. 11/52:19 pmISP - BOI
2 stops11h 40mMultiple Airlines
Deal found 9/10$1,079
This Cheapflightsfares deal was found by Cheapflights users on 9/10. 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.
mié. 11/126:28 amBOI - ISP
2 stops11h 33mMultiple Airlines
sáb. 11/152:19 pmISP - BOI
2 stops11h 40mMultiple Airlines
Deal found 9/10$1,084
This Cheapflightsfares deal was found by Cheapflights users on 9/10. 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.
lun. 10/206:30 amBOI - ISP
2 stops11h 31mMultiple Airlines
jue. 10/232:19 pmISP - BOI
2 stops11h 38mMultiple Airlines
Deal found 9/10$1,087
This Cheapflightsfares deal was found by Cheapflights users on 9/10. 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.
mar. 11/116:28 amBOI - ISP
2 stops11h 33mMultiple Airlines
vie. 11/142:19 pmISP - BOI
2 stops11h 40mMultiple Airlines
Deal found 9/10$1,097

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 septiembre 11, 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

lun. 11/10

8:50 pm-10:58 am

2 stops12h 08m

Islip Long Island

lun. 11/17

2:19 pm-11:59 pm

2 stops11h 40m

$795

BoiseIslip

BOI - ISP

BOIISP

Boise Air Term. Gowen Fld

vie. 11/14

6:28 am-8:01 pm

2 stops11h 33m

Islip Long Island

mar. 11/18

2:19 pm-11:59 pm

2 stops11h 40m

$845

BoiseIslip

BOI - ISP

BOIISP

Boise Air Term. Gowen Fld

lun. 11/10

8:50 pm-10:58 am

2 stops12h 08m

Islip Long Island

vie. 11/14

2:19 pm-11:59 pm

2 stops11h 40m

$913

BoiseIslip

BOI - ISP

BOIISP

Boise Air Term. Gowen Fld

vie. 10/31

6:28 am-8:01 pm

2 stops11h 33m

Islip Long Island

lun. 11/3

2:19 pm-11:59 pm

2 stops11h 40m

$918

BoiseIslip

BOI - ISP

BOIISP

Boise Air Term. Gowen Fld

mar. 11/11

6:28 am-8:01 pm

2 stops11h 33m

Islip Long Island

mar. 11/18

2:19 pm-11:59 pm

2 stops11h 40m

$953

BoiseIslip

BOI - ISP

BOIISP

Boise Air Term. Gowen Fld

lun. 11/10

8:50 pm-10:58 am

2 stops12h 08m

Islip Long Island

sáb. 11/15

2:19 pm-11:59 pm

2 stops11h 40m

$959

BoiseIslip

BOI - ISP

BOIISP

Boise Air Term. Gowen Fld

mié. 10/29

6:28 am-8:01 pm

2 stops11h 33m

Islip Long Island

mié. 11/5

2:19 pm-11:59 pm

2 stops11h 40m

$1,079

BoiseIslip

BOI - ISP

BOIISP

Boise Air Term. Gowen Fld

mié. 10/29

6:28 am-8:01 pm

2 stops11h 33m

Islip Long Island

jue. 11/6

2:19 pm-11:59 pm

2 stops11h 40m

$1,079

BoiseIslip

BOI - ISP

BOIISP

Boise Air Term. Gowen Fld

lun. 10/20

6:30 am-8:01 pm

2 stops11h 31m

Islip Long Island

jue. 10/23

2:19 pm-11:57 pm

2 stops11h 38m

$1,087

BoiseIslip

BOI - ISP

BOIISP

Boise Air Term. Gowen Fld

mar. 11/11

6:28 am-8:01 pm

2 stops11h 33m

Islip Long Island

sáb. 11/15

2:19 pm-11:59 pm

2 stops11h 40m

$1,142

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/9

Showing 1-10 of 16 results
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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?

Currently, January is the cheapest month in which you can book a flight from Idaho to Islip (average of $108). Flying from Idaho to Islip in November is currently the most expensive (average of $213). 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?

    Currently, January is the cheapest month in which you can book a flight from Idaho to Islip (average of $108). Flying from Idaho to Islip in November is currently the most expensive (average of $213). 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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