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$489+ Cheap flights from Islip, NY (ISP) to Montreal (YMQ)

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 10/2. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — YMQ
ago. 23 — ago. 301
sáb. 8/23
sáb. 8/30
1 adult, Economy
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Cheap flight deals from Islip to Montreal

Discover tips and strategies to find the most affordable flight options for your journey from Islip (ISP) to Montreal (YMQ). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated agosto 18, 2025.

Round-trip from

$489
(Kiwi.com)

Popular in

December

Cheapest in

April

Average price

$340
From Islip Long Island to Montreal (YMQ)
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Highest demand for flights based on searches. 3% potential increase in price ($12 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($4 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Find flight deals from Islip to Montreal

Cheapest flights from Islip to Montreal
Explore the most affordable flight options available from Islip to Montreal. Find the lowest fares from popular airlines and budget airlines, with prices last updated on agosto 18, 2025.

This Kiwi.com deal was found by Cheapflights users on 8/18. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/24:33 pmISP - YUL
2 stops21h 12mMultiple Airlines
jue. 10/96:45 amYUL - ISP
1 stop13h 57mMultiple Airlines
Deal found 8/18$489
This Kiwi.com deal was found by Cheapflights users on 8/18. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 10/104:58 pmISP - YUL
1 stop21h 22mMultiple Airlines
dom. 10/126:45 amYUL - ISP
2 stops14h 07mMultiple Airlines
Deal found 8/18$756
This Kiwi.com deal was found by Cheapflights users on 8/18. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 8/237:33 pmISP - YUL
2 stops16h 52mMultiple Airlines
lun. 8/256:45 amYUL - ISP
1 stop11h 47mMultiple Airlines
Deal found 8/18$1,305
This United deal was found by Cheapflights users on 8/16. 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.
lun. 9/154:33 pmISP - YUL
1 stop14h 52mMultiple Airlines
lun. 9/228:00 pmYUL - ISP
1 stop14h 58mMultiple Airlines
Deal found 8/16$2,523

Cheapflights Fare Finder

 
Customize your flight search to find flights from Islip to Montreal 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 agosto 18, 2025.
Use the filters below to find and compare flights from Islip to Montreal that are best for you.

Fly from

Islip

Fly to

Montreal

Route

Depart

Return

Price

IslipMontreal

ISP - YUL

ISPYUL

Islip Long Island

jue. 10/2

4:33 pm-1:45 pm

2 stops21h 12m

Montreal Pierre Elliott Trudeau Intl

jue. 10/9

6:45 am-8:42 pm

1 stop13h 57m

$489

IslipMontreal

ISP - YUL

ISPYUL

Islip Long Island

vie. 10/10

4:58 pm-2:20 pm

1 stop21h 22m

Montreal Pierre Elliott Trudeau Intl

dom. 10/12

6:45 am-8:52 pm

2 stops14h 07m

$756

IslipMontreal

ISP - YUL

ISPYUL

Islip Long Island

lun. 9/15

4:33 pm-7:25 am

1 stop14h 52m

Montreal Pierre Elliott Trudeau Intl

lun. 9/22

8:00 pm-10:58 am

1 stop14h 58m

$2,523

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/18

Best time to book a flight from Islip to Montreal

Have a flexible travel schedule? Discover the best time to fly to Montreal 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 Montreal

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

Currently, January is the cheapest month in which you can book a flight from Islip, New York to Montreal (average of $270). Flying from Islip, New York to Montreal in July is currently the most expensive (average of $409). 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 Montreal. 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 Montreal?

    Most people fly from Islip Long Island (ISP) if they book a flight from Islip to Montreal. On average, Long Island has 0 outbound flights to Montreal per day from 0 airlines. Islip Long Island is conveniently located just 7.2 mi from Islip’s city center.

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

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

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

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

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

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

    Currently, January is the cheapest month in which you can book a flight from Islip, New York to Montreal (average of $270). Flying from Islip, New York to Montreal in July is currently the most expensive (average of $409). 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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