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$569+ Cheap flights from Islip (ISP) to Montana

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 12/27. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — BZN
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheap flight deals from Islip to Montana

Keep the following information in mind while searching for Islip to Montana flight deals. Data was last updated September 11, 2025.

Round-trip from

$682
(Southwest)

One-way from

$569
(Southwest)

Popular in

December

Cheapest in

November

Average price

$474
From Islip Long Island to Montana
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One-way flight from Islip Long Island to Montana
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Highest demand for flights based on searches. 2% potential increase in price ($12 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($14 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 Islip to Montana

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

This Expedia 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/252:19 pmISP - BZN
2 stops11h 53mMultiple Airlines
Mon 9/297:23 pmBZN - ISP
2 stops13h 35mMultiple Airlines
Deal found 9/10$1,353

Cheapflights Fare Finder

 
Customize your flight search to find flights from Islip to Montana 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 September 11, 2025.
Use the filters below to find and compare flights from Islip to Montana that are best for you.

Fly from

Islip

Fly to

Montana

Route

Depart

Return

Price

IslipBozeman

ISP - BZN

ISPBZN

Islip Long Island

Mon 2/16

5:35 am-2:55 pm

2 stops11h 20m

Bozeman Gallatin Field

Fri 2/20

6:10 am-11:30 pm

2 stops15h 20m

$682

IslipBozeman

ISP - BZN

ISPBZN

Islip Long Island

Thu 9/25

2:19 pm-12:12 am

2 stops11h 53m

Bozeman Gallatin Field

Mon 9/29

7:23 pm-10:58 am

2 stops13h 35m

$1,353

IslipBozeman

ISP - BZN

ISPBZN

Islip Long Island

Sat 12/27

5:55 pm-12:35 am

2 stops8h 40m

$569

IslipBozeman

ISP - BZN

ISPBZN

Islip Long Island

Sat 12/27

9:09 pm-3:58 pm

3 stops44h 49m

$797

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

Best time to book a flight from Islip to Montana

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

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

Currently, October is the cheapest month in which you can book a flight from Islip to Montana (average of $371). Flying from Islip to Montana in May is currently the most expensive (average of $477). 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 Islip to Montana. 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 from for flights from Islip to Montana?

    If you book a flight to Montana from Islip, you will be flying from Long Island, which is the city’s only airport. Islip Long Island (ISP) is located 7.2 mi from the center of Islip.

  • How long is the flight from Islip to Montana?

    Departing from Islip to Montana will take you 11h 20m. Airlines will cover a distance of 1925 mi.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Islip to Montana 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 Islip to Montana?

    Currently, October is the cheapest month in which you can book a flight from Islip to Montana (average of $371). Flying from Islip to Montana in May is currently the most expensive (average of $477). 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

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