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$550+ Cheap flights from Islip, NY (ISP) to Montana

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 8/12. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — BZN
Jun 3 — Jun 101
Wed 6/3
Wed 6/10
1 adult, Economy
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Cheap 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 May 4, 2026.

This Southwest deal was found by Cheapflights users on 5/3. 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.
Wed 8/123:20 pm
ISP
-
BZN
2 stops9h 05m
Southwest
Wed 8/196:55 am
BZN
-
ISP
2 stops12h 10m
Southwest
Deal found 5/3$550
This Southwest deal was found by Cheapflights users on 5/2. 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.
Wed 9/210:55 am
ISP
-
BZN
2 stops11h 05m
Southwest
Mon 9/74:40 pm
BZN
-
ISP
2 stops15h 35m
Southwest
Deal found 5/2$646
This Southwest deal was found by Cheapflights users on 4/29. 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.
Sat 6/62:45 pm
ISP
-
BZN
2 stops10h 05m
Southwest
Mon 6/87:15 pm
BZN
-
ISP
2 stops10h 50m
Southwest
Deal found 4/29$762
This Southwest deal was found by Cheapflights users on 4/29. 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.
Thu 6/1112:30 pm
ISP
-
BZN
2 stops13h 00m
Southwest
Mon 6/157:15 pm
BZN
-
ISP
2 stops10h 50m
Southwest
Deal found 4/29$805
This Southwest deal was found by Cheapflights users on 4/29. 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.
Thu 6/1812:30 pm
ISP
-
BZN
2 stops13h 00m
Southwest
Mon 6/227:15 pm
BZN
-
ISP
2 stops10h 50m
Southwest
Deal found 4/29$849
This Southwest deal was found by Cheapflights users on 5/3. 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.
Mon 6/2912:30 pm
ISP
-
BZN
2 stops13h 00m
Southwest
Mon 7/67:15 pm
BZN
-
ISP
2 stops10h 50m
Southwest
Deal found 5/3$880
This Southwest deal was found by Cheapflights users on 5/1. 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.
Thu 5/216:00 am
ISP
-
BZN
2 stops11h 40m
Southwest
Fri 5/2210:55 am
BZN
-
ISP
2 stops10h 35m
Southwest
Deal found 5/1$888
This Southwest deal was found by Cheapflights users on 4/29. 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.
Sun 5/31:50 pm
ISP
-
BZN
2 stops10h 55m
Southwest
Tue 5/58:10 am
BZN
-
ISP
2 stops12h 00m
Southwest
Deal found 4/29$1,167

Find flight deals from Islip to Montana

Keep the following information in mind while searching for Islip to Montana flight deals. Data was last updated May 4, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$550
(Southwest)

Popular in

December

Cheapest in

November

Average price

$485
Provider with most accurate pricing for New York (NYC)-Bozeman Gallatin Field flight deals.
Search Deals
Provider most trusted by Cheapflights users for New York (NYC)-Bozeman Gallatin Field flights.
Search Deals
From Islip Long Island to Montana
Search Deals
High demand for flights, 1% potential price rise
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($17 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 2026
Search Deals

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 May 4, 2026.
Use the filters below to find and compare flights from Islip to Montana that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

IslipBozeman

ISP - BZN

ISPBZN

Islip Long Island

Wed 8/12

3:20 pm-10:25 pm

2 stops9h 05m

Bozeman Gallatin Field

Wed 8/19

6:55 am-9:05 pm

2 stops12h 10m

$550

IslipBozeman

ISP - BZN

ISPBZN

Islip Long Island

Wed 9/2

10:55 am-8:00 pm

2 stops11h 05m

Bozeman Gallatin Field

Mon 9/7

4:40 pm-10:15 am

2 stops15h 35m

$646
Quickest round-trip

IslipBozeman

ISP - BZN

ISPBZN

Islip Long Island

Sat 6/6

2:45 pm-10:50 pm

2 stops10h 05m

Bozeman Gallatin Field

Mon 6/8

7:15 pm-8:05 am

2 stops10h 50m

$762

IslipBozeman

ISP - BZN

ISPBZN

Islip Long Island

Thu 6/11

12:30 pm-11:30 pm

2 stops13h 00m

Bozeman Gallatin Field

Mon 6/15

7:15 pm-8:05 am

2 stops10h 50m

$805

IslipBozeman

ISP - BZN

ISPBZN

Islip Long Island

Thu 6/18

9:10 am-6:35 pm

2 stops11h 25m

Bozeman Gallatin Field

Mon 6/22

7:15 pm-8:05 am

2 stops10h 50m

$849

IslipBozeman

ISP - BZN

ISPBZN

Islip Long Island

Mon 6/29

12:30 pm-11:30 pm

2 stops13h 00m

Bozeman Gallatin Field

Mon 7/6

7:15 pm-8:05 am

2 stops10h 50m

$880

IslipBozeman

ISP - BZN

ISPBZN

Islip Long Island

Thu 5/21

6:00 am-3:40 pm

2 stops11h 40m

Bozeman Gallatin Field

Fri 5/22

10:55 am-11:30 pm

2 stops10h 35m

$888

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/3

Sorted by cheapest first

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
No data available for this route at this time. Please check back soon.

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, New York to Montana?

    A quick flight from Islip, New York to Montana can take about 9h 05m. Southwest provides one of the quickest options available for as low as $550. 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.

See more FAQs

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Alternative routes for Islip to Montana

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