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$360+ Cheap flights from Pierre Elliott Trudeau Intl (YUL) to Islip (ISP)

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 10/26. Fares are subject to change and may not be available on all flights or dates of travel.
YUL — ISP
Oct 13 — Oct 201
Mon 10/13
Mon 10/20
1 adult, Economy
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Cheap flight deals from Pierre Elliott Trudeau Intl to Islip

Discover tips and strategies to find the most affordable flight options for your journey from Pierre Elliott Trudeau Intl (YUL) to Islip (ISP). 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 September 13, 2025.

Round-trip from

$360
(Trip.com)

Popular in

September

Cheapest in

July

Average price

$320
From Montreal Pierre Elliott Trudeau Intl to Islip Long Island
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Highest demand for flights based on searches. 4% potential increase in price ($12 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 September 2025
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Find flight deals from Pierre Elliott Trudeau Intl to Islip

Cheapest flights from Pierre Elliott Trudeau Intl to Islip
Explore the most affordable flight options available from Pierre Elliott Trudeau Intl to Islip. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 13, 2025.

This Trip.com deal was found by Cheapflights users on 9/11. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/264:35 pmYUL - ISP
1 stop18h 02mMultiple Airlines
Sun 11/29:27 pmISP - YUL
1 stop27h 03mMultiple Airlines
Deal found 9/11$360
This Kiwi.com deal was found by Cheapflights users on 9/12. 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 9/156:45 amYUL - ISP
2 stops27h 55mMultiple Airlines
Fri 9/195:05 pmISP - YUL
1 stop21h 15mMultiple Airlines
Deal found 9/12$807

Cheapflights Fare Finder

 
Customize your flight search to find flights from Pierre Elliott Trudeau Intl to Islip 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 September 13, 2025.
Use the filters below to find and compare flights from Montreal Pierre Elliott Trudeau Intl Airport to Islip that are best for you.

Fly from

Pierre Elliott Trudeau Intl

Fly to

Islip

Route

Depart

Return

Price

MontrealIslip

YUL - ISP

YULISP

Montreal Pierre Elliott Trudeau Intl

Sun 10/26

4:35 pm-10:37 am

1 stop18h 02m

Islip Long Island

Sun 11/2

9:27 pm-12:30 am

1 stop27h 03m

$360

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/11

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

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

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

Currently, January is the cheapest month in which you can book a flight from Montreal Pierre Elliott Trudeau Intl Airport to Islip (average of $108). Flying from Montreal Pierre Elliott Trudeau Intl Airport to Islip in November is currently the most expensive (average of $213). 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 Pierre Elliott Trudeau Intl to Islip. 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 into for flights to Islip from Montreal Pierre Elliott Trudeau Intl?

    Located just 7.2 mi from the city center, Islip Long Island is the airport most travelers will use when flying to Islip from Montreal Pierre Elliott Trudeau Intl. Booking flights from Montreal Pierre Elliott Trudeau Intl to Long Island (ISP) should be relatively easy as there are 0 daily inbound flights from Montreal Pierre Elliott Trudeau Intl from 0 different airlines.

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

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

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

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

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

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

    Currently, January is the cheapest month in which you can book a flight from Montreal Pierre Elliott Trudeau Intl Airport to Islip (average of $108). Flying from Montreal Pierre Elliott Trudeau Intl Airport to Islip in November is currently the most expensive (average of $213). 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.

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