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$294+ Cheap flights from Islip, NY (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 8/20. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — BZN
ago. 5 — ago. 121
mar. 8/5
mar. 8/12
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 julio 31, 2025.

Round-trip from

$552
(Southwest)

One-way from

$229
(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. 1% potential increase in price ($7 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($15 potential savings vs. average RT price).
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Average for round-trip flights in July 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 julio 31, 2025.

This Southwest deal was found by Cheapflights users on 7/31. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 8/204:00 pmISP - BZN
2 stops8h 55mSouthwest
mié. 8/276:00 amBZN - ISP
2 stops13h 05mSouthwest
Deal found 7/31$552
This United deal was found by Cheapflights users on 7/31. 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 United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 8/207:30 amISP - BZN
3 stops17h 13mMultiple Airlines
lun. 8/254:00 pmBZN - ISP
3 stops26h 01mMultiple Airlines
Deal found 7/31$960

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 julio 31, 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

mié. 8/20

4:00 pm-10:55 pm

2 stops8h 55m

Bozeman Gallatin Field

mié. 8/27

6:00 am-9:05 pm

2 stops13h 05m

$552

IslipBozeman

ISP - BZN

ISPBZN

Islip Long Island

mié. 8/20

7:30 am-10:43 pm

3 stops17h 13m

Bozeman Gallatin Field

lun. 8/25

4:00 pm-8:01 pm

3 stops26h 01m

$960

IslipBozeman

ISP - BZN

ISPBZN

Islip Long Island

mié. 8/20

12:30 pm-10:55 pm

2 stops12h 25m

$294

IslipBozeman

ISP - BZN

ISPBZN

Islip Long Island

mié. 8/20

2:55 pm-7:09 pm

3 stops30h 14m

$596

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/31

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, New York to Montana?

Currently, October is the cheapest month in which you can book a flight from Islip, New York to Montana (average of $371). Flying from Islip, New York to Montana in May is currently the most expensive (average of $478). 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 Montana

Get insights into the airlines that provide service to Montana. 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 Montana. Reviews last updated julio 31, 2025.
Peruse reviews from past customers who have flown with Southwest from Islip to Montana to help guide your decision. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,246 reviews

Comfort

8.0

Overall

8.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Food

7.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Southwest
8.0
Very good
4,246 reviews
Southwest
8.0
Very good
4,246 reviews

Comfort

8.0

Overall

8.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Food

7.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.

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.

  • 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, New York to Montana?

    Currently, October is the cheapest month in which you can book a flight from Islip, New York to Montana (average of $371). Flying from Islip, New York to Montana in May is currently the most expensive (average of $478). 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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