How long is the flight from Montana to Islip?

For as low as $495, Southwest can have you in Islip from Montana in 16h 05m. Airlines will cover a distance of 1925 mi.

In terms of precipitation, rainfall in Islip 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 when rainfall is around 3.3 in.

If weather is an important factor for your trip to Islip, 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).

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

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Montana to Islip as you normally would.

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

Most people fly into Islip Long Island (ISP) if they book a flight to Islip from Montana. Long Island is conveniently located just 7.2 mi from Islip’s city center.

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

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

How can I find direct flights from Montana to Islip?

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

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

Yes. Cheapflights offers flight deals from Montana 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.

$495+ Flights from Montana to Islip

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Cheap flight deals from Montana to Islip

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$495 (Southwest)
Popular in	April
Cheapest in	March
Average price	$422

Provider with most accurate pricing for Bozeman Gallatin Field-New York (NYC) flight deals.

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Provider most trusted by Cheapflights users for Bozeman Gallatin Field-New York (NYC) flights.

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From Montana to Islip Long Island

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Highest demand for flights based on searches. 1% potential increase in price ($5 potential increase over avg. RT price).

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Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).

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Average for round-trip flights in October 2025

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Find flight deals from Montana to Islip

Cheapest flights from Montana to Islip
Explore the most affordable flight options available from Montana to Islip. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 10, 2025.

Fri 11/75:45 pmBZN - ISP

2 stops16h 05mSouthwest

Mon 11/1011:05 amISP - BZN

2 stops15h 10mSouthwest

Deal found 10/8

$495

Fri 11/71:37 pmBZN - ISP

2 stops43h 27mMultiple Airlines

Mon 11/1012:40 pmISP - BZN

2 stops28h 50mMultiple Airlines

Deal found 10/8

$1,050

Thu 10/237:34 pmBZN - ISP

2 stops13h 30mMultiple Airlines

Mon 10/279:59 amISP - BZN

2 stops16h 16mMultiple Airlines

Deal found 10/8

$1,903

Best flights from Montana to Islip
Discover carefully curated flight deals from Montana to Islip that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 10, 2025.

Fri 11/75:45 pmBZN - ISP

2 stops16h 05mSouthwest

Mon 11/1011:05 amISP - BZN

2 stops15h 10mSouthwest

Deal found 10/8

$495

Fri 11/71:37 pmBZN - ISP

2 stops43h 27mMultiple Airlines

Mon 11/1012:40 pmISP - BZN

2 stops28h 50mMultiple Airlines

Deal found 10/8

$1,050

Thu 10/237:34 pmBZN - ISP

2 stops13h 30mMultiple Airlines

Mon 10/279:59 amISP - BZN

2 stops16h 16mMultiple Airlines

Deal found 10/8

$1,903

Last-minute flights from Montana to Islip
Discover last-minute flight deals from Montana to Islip. Data last updated October 10, 2025 and is based on user searches.

Thu 10/237:34 pmBZN - ISP

2 stops13h 30mMultiple Airlines

Mon 10/279:59 amISP - BZN

2 stops16h 16mMultiple Airlines

Deal found 10/8

$1,903

Fri 11/75:45 pmBZN - ISP

2 stops16h 05mSouthwest

Mon 11/1011:05 amISP - BZN

2 stops15h 10mSouthwest

Deal found 10/8

$495

Fri 11/71:37 pmBZN - ISP

2 stops43h 27mMultiple Airlines

Mon 11/1012:40 pmISP - BZN

2 stops28h 50mMultiple Airlines

Deal found 10/8

$1,050

Fly from

Fly to

Route

Depart

Return

Price

BozemanIslip

BZN - ISP

BZNISP

Bozeman Gallatin Field

Fri 11/7

5:45 pm-11:50 am

2 stops16h 05m

Islip Long Island

Mon 11/10

11:05 am-12:15 am

2 stops15h 10m

$495

BozemanIslip

BZN - ISP

BZNISP

Bozeman Gallatin Field

Fri 11/7

1:37 pm-11:04 am

2 stops43h 27m

Islip Long Island

Mon 11/10

12:40 pm-3:30 pm

2 stops28h 50m

$1,050

BozemanIslip

BZN - ISP

BZNISP

Bozeman Gallatin Field

Thu 10/23

7:34 pm-11:04 am

2 stops13h 30m

Islip Long Island

Mon 10/27

9:59 am-12:15 am

2 stops16h 16m

$1,903

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/8

Best time to book a flight from Montana to Islip

Have a flexible travel schedule? Discover the best time to fly to Islip from Montana 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 Montana to Islip

What is the cheapest month to book a flight from Montana to Islip?

Currently, February is the cheapest month in which you can book a flight from Montana to Islip (average of $106). Flying from Montana to Islip in May is currently the most expensive (average of $293). 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

What airport do you fly into for flights to Islip from Montana?
Most people fly into Islip Long Island (ISP) if they book a flight to Islip from Montana. Long Island is conveniently located just 7.2 mi from Islip’s city center.
How long is the flight from Montana to Islip?
For as low as $495, Southwest can have you in Islip from Montana in 16h 05m. Airlines will cover a distance of 1925 mi.
Can I find deals for flights from Montana to Islip that include hotel bookings?
Yes. In addition to deals on Montana to Islip flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Montana to Islip?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Montana to Islip.
Can I find deals for business class flights from Montana to Islip?
Yes. Cheapflights offers flight deals from Montana 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 Montana to Islip?
Currently, February is the cheapest month in which you can book a flight from Montana to Islip (average of $106). Flying from Montana to Islip in May is currently the most expensive (average of $293). 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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$495+ Cheap flights from Montana to Islip (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 11/7. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Montana 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 Montana to Islip

Keep the following information in mind while searching for Montana to Islip flight deals. Data was last updated October 10, 2025.

Most accurate provider

Most trusted provider

Round-trip from

Popular in

Cheapest in

Average price

Find flight deals from Montana to Islip

Cheapest flights from Montana to IslipExplore the most affordable flight options available from Montana to Islip. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 10, 2025.

Explore the most affordable flight options available from Montana to Islip. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 10, 2025.

Cheapflights Fare Finder

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

Best time to book a flight from Montana to Islip

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

Cheapflights Insights

Everything you need to know about your flight from Montana to Islip

What is the cheapest month to book a flight from Montana to Islip?

Related info for your journey

Find useful and relevant information for your journey from Montana 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 Montana?

How long is the flight from Montana to Islip?

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

How can I find direct flights from Montana to Islip?

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

What is the cheapest month to book a flight from Montana to Islip?

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Cheapest flights from Montana to Islip
Explore the most affordable flight options available from Montana to Islip. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 10, 2025.