In terms of precipitation, rainfall in Islip, New York ranges from 3.3 - 4.4 inches per month. March is typically the wettest month, when rainfall can reach 4.4 in. February is typically the driest time to visit Islip, New York when rainfall is around 3.3 in.

If weather is an important factor for your trip to Islip, New York, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 30.2 F).

How far in advance should I book a flight from Idaho to Islip, New York?

Find a great deal and save up to 110% by booking at least 38 days prior to your desired departure date, rather than waiting until the week of travel. According to our data, there are a number of flights available from Idaho to Islip, New York within the next two weeks, with the cheapest ticket starting at $445.

What is the cheapest month to fly from Idaho to Islip, New York?

Due to multiple factors, expect to potentially pay more when booking in December. For low rates, January can be a great choice for travel to Islip, New York. Flights to Islip, New York from Idaho in January are about $428 on average during January, but can be found for as low as $263.

What is the cheapest time of day to fly from ID to ISP?

When flying from Idaho to Islip, New York, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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.

$200+ Flights from Idaho to Islip, NY

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Cheap flight deals from Idaho to Islip

Round-trip from	$473 (Southwest)
One-way from	$200 (Southwest)
Popular in	December
Cheapest in	January
Average price	$398

From Idaho to Islip Long Island

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One-way flight from Idaho to Islip Long Island

Search Deals

Highest demand for flights based on searches. 13% potential increase in price ($68 potential increase over avg. RT price).

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Cheapest flight prices on average. 3% potential price decrease ($15 potential savings vs. average RT price).

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Average for round-trip flights in June 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 junio 26, 2025.

jue. 7/316:25 pmBOI - ISP

2 stops13h 00mSouthwest

lun. 8/42:40 pmISP - BOI

2 stops11h 50mSouthwest

Deal found 6/25

$473

jue. 7/317:15 pmBOI - ISP

3 stops18h 06mMultiple Airlines

lun. 8/44:33 pmISP - BOI

2 stops32h 19mMultiple Airlines

Deal found 6/25

$1,200

Best flights from Idaho to Islip
Discover carefully curated flight deals from Idaho to Islip that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated junio 26, 2025.

jue. 7/316:25 pmBOI - ISP

2 stops13h 00mSouthwest

lun. 8/42:40 pmISP - BOI

2 stops11h 50mSouthwest

Deal found 6/25

$473

jue. 7/317:15 pmBOI - ISP

3 stops18h 06mMultiple Airlines

lun. 8/44:33 pmISP - BOI

2 stops32h 19mMultiple Airlines

Deal found 6/25

$1,200

Last-minute flights from Idaho to Islip
Discover last-minute flight deals from Idaho to Islip. Data last updated junio 26, 2025 and is based on user searches.

jue. 7/316:25 pmBOI - ISP

2 stops13h 00mSouthwest

lun. 8/42:40 pmISP - BOI

2 stops11h 50mSouthwest

Deal found 6/25

$473

jue. 7/317:15 pmBOI - ISP

3 stops18h 06mMultiple Airlines

lun. 8/44:33 pmISP - BOI

2 stops32h 19mMultiple Airlines

Deal found 6/25

$1,200

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 junio 26, 2025.

mar. 7/295:05 amBOI - ISP

2 stops9h 55mSouthwest

Deal found 6/25

$200

mar. 7/297:15 pmBOI - ISP

3 stops37h 43mMultiple Airlines

Deal found 6/25

$442

Cheapflights Fare Finder

Use the filters below to find and compare flights from Idaho to Islip that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

BoiseIslip

BOI - ISP

BOIISP

Boise Air Term. Gowen Fld

jue. 7/31

6:25 pm-9:25 am

2 stops13h 00m

Islip Long Island

lun. 8/4

2:40 pm-12:30 am

2 stops11h 50m

$473

BoiseIslip

BOI - ISP

BOIISP

Boise Air Term. Gowen Fld

jue. 7/31

7:15 pm-3:21 pm

3 stops18h 06m

Islip Long Island

lun. 8/4

4:33 pm-10:52 pm

2 stops32h 19m

$1,200

BoiseIslip

BOI - ISP

BOIISP

Boise Air Term. Gowen Fld

mar. 7/29

5:05 am-5:00 pm

2 stops9h 55m

$200

BoiseIslip

BOI - ISP

BOIISP

Boise Air Term. Gowen Fld

mar. 7/29

7:15 pm-10:58 am

3 stops37h 43m

$442

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/25

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, January is the cheapest month in which you can book a flight from Idaho to Islip, New York (average of $108). Flying from Idaho to Islip, New York 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.

Reviews of airlines servicing Islip

Read through reviews of airlines operating flights from Idaho to Islip, such as Southwest. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Southwest

8.0

Very good

4,276 reviews

Reviews

1 / 20

8.0

Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

Southwest

8.0

Very good

4,276 reviews

Southwest

8.0

Very good

4,276 reviews

Reviews

1 / 20

8.0

Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

Related info for your journey

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, January is the cheapest month in which you can book a flight from Idaho to Islip, New York (average of $108). Flying from Idaho to Islip, New York 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.

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$200+ 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 7/29. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Idaho to Islip with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

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 junio 26, 2025.

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Idaho to Islip

Cheapest flights from Idaho to IslipExplore 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 junio 26, 2025.

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 junio 26, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Idaho to Islip that are best for you.

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.

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?

Reviews of airlines servicing Islip

Get insights into the airlines that provide service to Islip. 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 Islip. Reviews last updated junio 26, 2025.

Read through reviews of airlines operating flights from Idaho to Islip, such as Southwest. You can also see how each airline stacks up 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 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?

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

How can I find direct flights from Idaho to Islip?

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

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

Traveling to a place near Idaho?

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Alternative routes for Idaho to Islip

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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 junio 26, 2025.