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Pierre Elliott Trudeau Intl

$527+ Cheap flights from Islip, NY (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 3/22. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — YUL
Mar 7 — Mar 141
Sat 3/7
Sat 3/14
1 adult, Economy
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Cheap 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 February 5, 2026.

This Kiwi.com deal was found by Cheapflights users on 2/4. 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.
Sun 3/224:34 pm
ISP
-
YUL
2 stops23h 46m
Multiple Airlines
Sun 3/294:35 pm
YUL
-
ISP
1 stop19h 58m
Multiple Airlines
Deal found 2/4$527
This Kiwi.com deal was found by Cheapflights users on 2/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/201:42 pm
ISP
-
YUL
1 stop10h 48m
Multiple Airlines
Fri 3/2710:15 am
YUL
-
ISP
2 stops23h 33m
Multiple Airlines
Deal found 2/3$616
This Kiwi.com deal was found by Cheapflights users on 2/5. 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.
Mon 2/163:34 pm
ISP
-
YUL
2 stops33h 04m
Multiple Airlines
Sun 2/223:55 pm
YUL
-
ISP
1 stop26h 45m
Multiple Airlines
Deal found 2/5$1,202
This Mytrip deal was found by Cheapflights users on 2/3. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/169:59 am
ISP
-
YUL
2 stops7h 46m
Multiple Airlines
Mon 2/168:25 pm
YUL
-
ISP
2 stops22h 19m
Multiple Airlines
Deal found 2/3$1,646

Find 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 February 5, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$527
(Kiwi.com)

Popular in

December

Cheapest in

April

Average price

$330
Provider with most accurate pricing for Islip Long Island-Montreal Pierre Elliott Trudeau Intl flight deals.
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Provider most trusted by Cheapflights users for Islip Long Island-Montreal Pierre Elliott Trudeau Intl flights.
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From Islip Long Island to Montreal Pierre Elliott Trudeau Intl
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($28 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($5 potential savings vs. average RT price).
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Average for round-trip flights in February 2026
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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 February 5, 2026.
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

Sun 3/22

4:34 pm-4:20 pm

2 stops23h 46m

Montreal Pierre Elliott Trudeau Intl

Sun 3/29

4:35 pm-12:33 pm

1 stop19h 58m

$527

IslipMontreal

ISP - YUL

ISPYUL

Islip Long Island

Fri 3/20

1:42 pm-12:30 am

1 stop10h 48m

Montreal Pierre Elliott Trudeau Intl

Fri 3/27

10:15 am-9:48 am

2 stops23h 33m

$616

IslipMontreal

ISP - YUL

ISPYUL

Islip Long Island

Mon 2/16

3:34 pm-12:38 am

2 stops33h 04m

Montreal Pierre Elliott Trudeau Intl

Sun 2/22

3:55 pm-6:40 pm

1 stop26h 45m

$1,202

IslipMontreal

ISP - YUL

ISPYUL

Islip Long Island

Mon 2/16

9:59 am-5:45 pm

2 stops7h 46m

Montreal Pierre Elliott Trudeau Intl

Mon 2/16

8:25 pm-6:44 pm

2 stops22h 19m

$1,646

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/4

  • Most accurate provider: When it comes to deals on Islip, New York-Montreal Pierre Elliott Trudeau Intl Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Islip, New York-Montreal Pierre Elliott Trudeau Intl Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Islip, New York-Montreal Pierre Elliott Trudeau Intl Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Islip, New York-Montreal Pierre Elliott Trudeau Intl Airport flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Islip, New York-Montreal Pierre Elliott Trudeau Intl Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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, New York to Montreal Pierre Elliott Trudeau Intl Airport?

Currently, January is the cheapest month in which you can book a flight from Islip, New York to Montreal Pierre Elliott Trudeau Intl Airport (average of $101). Flying from Islip, New York to Montreal Pierre Elliott Trudeau Intl Airport in August is currently the most expensive (average of $175). 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, New York to Montreal Pierre Elliott Trudeau Intl Airport?

    Currently, January is the cheapest month in which you can book a flight from Islip, New York to Montreal Pierre Elliott Trudeau Intl Airport (average of $101). Flying from Islip, New York to Montreal Pierre Elliott Trudeau Intl Airport in August is currently the most expensive (average of $175). 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
Dorval

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