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Pierre Elliott Trudeau Intl

$462+ Cheap flights from Islip (ISP) to Pierre Elliott Trudeau Intl (YUL)

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 10/31. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — YUL
oct. 17 — oct. 241
vie. 10/17
vie. 10/24
1 adult, Economy
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Cheap flight deals from Islip to Pierre Elliott Trudeau Intl

Discover tips and strategies to find the most affordable flight options for your journey from Islip (ISP) to Pierre Elliott Trudeau Intl (YUL). 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 septiembre 17, 2025.

Round-trip from

$462
(Kiwi.com)

Popular in

December

Cheapest in

April

Average price

$325
From Islip Long Island to Montreal Pierre Elliott Trudeau Intl
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Highest demand for flights based on searches. 3% potential increase in price ($9 potential increase over avg. RT price).
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Cheapest flight prices on average. 0% potential price decrease ($4 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 Pierre Elliott Trudeau Intl

Cheapest flights from Islip to Pierre Elliott Trudeau Intl
Explore the most affordable flight options available from Islip to Pierre Elliott Trudeau Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on septiembre 17, 2025.

This Kiwi.com deal was found by Cheapflights users on 9/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 10/314:58 pmISP - YUL
2 stops31h 45mMultiple Airlines
vie. 11/74:35 pmYUL - ISP
1 stop18h 02mMultiple Airlines
Deal found 9/16$462
This United deal was found by Cheapflights users on 9/16. 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.
mar. 10/147:30 amISP - YUL
1 stop4h 15mMultiple Airlines
mar. 10/211:05 pmYUL - ISP
1 stop6h 40mMultiple Airlines
Deal found 9/16$2,533
This United deal was found by Cheapflights users on 9/16. 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. 10/1311:53 amISP - YUL
1 stop8h 07mMultiple Airlines
lun. 10/208:05 amYUL - ISP
1 stop8h 10mMultiple Airlines
Deal found 9/16$2,593

Cheapflights Fare Finder

 
Customize your flight search to find flights from Islip to Pierre Elliott Trudeau Intl 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 septiembre 17, 2025.
Use the filters below to find and compare flights from Islip to Montreal Pierre Elliott Trudeau Intl Airport that are best for you.

Fly from

Islip

Fly to

Pierre Elliott Trudeau Intl

Route

Depart

Return

Price

IslipMontreal

ISP - YUL

ISPYUL

Islip Long Island

vie. 10/31

4:58 pm-12:43 am

2 stops31h 45m

Montreal Pierre Elliott Trudeau Intl

vie. 11/7

4:35 pm-10:37 am

1 stop18h 02m

$462

IslipMontreal

ISP - YUL

ISPYUL

Islip Long Island

mié. 2/11

11:50 am-12:30 am

2 stops12h 40m

Montreal Pierre Elliott Trudeau Intl

mar. 2/17

4:35 pm-10:40 am

1 stop18h 05m

$537

IslipMontreal

ISP - YUL

ISPYUL

Islip Long Island

mié. 2/11

11:50 am-12:30 am

2 stops12h 40m

Montreal Pierre Elliott Trudeau Intl

dom. 2/15

4:35 pm-10:40 am

1 stop18h 05m

$566

IslipMontreal

ISP - YUL

ISPYUL

Islip Long Island

mié. 2/11

11:50 am-12:30 am

2 stops12h 40m

Montreal Pierre Elliott Trudeau Intl

lun. 2/16

6:45 am-12:31 am

1 stop17h 46m

$587

IslipMontreal

ISP - YUL

ISPYUL

Islip Long Island

jue. 2/12

11:45 am-12:30 am

2 stops12h 45m

Montreal Pierre Elliott Trudeau Intl

mar. 2/17

4:35 pm-10:40 am

1 stop18h 05m

$615

IslipMontreal

ISP - YUL

ISPYUL

Islip Long Island

jue. 2/12

11:45 am-12:30 am

2 stops12h 45m

Montreal Pierre Elliott Trudeau Intl

lun. 2/16

8:00 am-12:31 am

1 stop16h 31m

$672

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/16

Best time to book a flight from Islip to Pierre Elliott Trudeau Intl

Have a flexible travel schedule? Discover the best time to fly to Pierre Elliott Trudeau Intl 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 Pierre Elliott Trudeau Intl Airport

What is the cheapest month to book a flight from Islip to Montreal Pierre Elliott Trudeau Intl Airport?

Currently, January is the cheapest month in which you can book a flight from Islip to Montreal Pierre Elliott Trudeau Intl Airport (average of $270). Flying from Islip to Montreal Pierre Elliott Trudeau Intl Airport 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 Pierre Elliott Trudeau Intl. 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 Pierre Elliott Trudeau Intl?

    If you book a flight to Montreal Pierre Elliott Trudeau Intl 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. There are 0 flights from Long Island to Montreal Pierre Elliott Trudeau Intl per day from 0 different airlines.

  • Can I find deals for flights from Islip to Pierre Elliott Trudeau Intl that include hotel bookings?

    Yes. In addition to deals on Islip to Pierre Elliott Trudeau Intl flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Islip to Pierre Elliott Trudeau Intl?

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

  • Can I find deals for business class flights from Islip to Pierre Elliott Trudeau Intl?

    Yes. Cheapflights offers flight deals from Islip to Pierre Elliott Trudeau Intl 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 Montreal Pierre Elliott Trudeau Intl Airport?

    Currently, January is the cheapest month in which you can book a flight from Islip to Montreal Pierre Elliott Trudeau Intl Airport (average of $270). Flying from Islip to Montreal Pierre Elliott Trudeau Intl Airport 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

Traveling to a place near Montreal Pierre Elliott Trudeau Intl Airport?

Book flights to Montreal Pierre Elliott Trudeau Intl Airport if you plan to visit one of these locations
Laval
Longueuil
Brossard
Sherbrooke
Dorval

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