$367+ 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 11/6. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — YUL
Nov 8 — Nov 151
Round-trip
1 adult, Economy
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Find cheap flights from Islip to Pierre Elliott Trudeau Intl with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
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Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Islip to Pierre Elliott Trudeau Intl
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Best
Last-minute
One-way
Cheapest flights from Islip to Pierre Elliott Trudeau IntlExplore 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 October 9, 2026.
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 October 9, 2026.
This Expedia deal was found by Cheapflights users on 10/5. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/196:00 am -
2 stops13h 15m
Thu 11/266:45 am -
2 stops15h 55m
Deal found 10/5![Multiple Airlines logo]()
$1,112
This FlightHub deal was found by Cheapflights users on 10/7. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/196:20 pm -
1 stop22h 12m
Mon 12/215:25 pm -
2 stops16h 27m
Deal found 10/7![Multiple Airlines logo]()
$1,380
This FlightHub deal was found by Cheapflights users on 10/4. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/246:20 pm -
1 stop22h 05m
Mon 12/285:25 pm -
2 stops16h 27m
Deal found 10/4![Multiple Airlines logo]()
$1,581
Best flights from Islip to Pierre Elliott Trudeau IntlDiscover carefully curated flight deals from Islip to Pierre Elliott Trudeau Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 9, 2026.
Discover carefully curated flight deals from Islip to Pierre Elliott Trudeau Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 9, 2026.
This Expedia deal was found by Cheapflights users on 10/5. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/196:00 am -
2 stops13h 15m
Thu 11/266:45 am -
2 stops15h 55m
Deal found 10/5![Multiple Airlines logo]()
$1,112
This FlightHub deal was found by Cheapflights users on 10/7. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/196:20 pm -
1 stop22h 12m
Mon 12/215:25 pm -
2 stops16h 27m
Deal found 10/7![Multiple Airlines logo]()
$1,380
This FlightHub deal was found by Cheapflights users on 10/4. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/246:20 pm -
1 stop22h 05m
Mon 12/285:25 pm -
2 stops16h 27m
Deal found 10/4![Multiple Airlines logo]()
$1,581
Last-minute flights from Islip to Pierre Elliott Trudeau IntlDiscover last-minute flight deals from Islip to Pierre Elliott Trudeau Intl. Data last updated October 9, 2026 and is based on user searches.
Discover last-minute flight deals from Islip to Pierre Elliott Trudeau Intl. Data last updated October 9, 2026 and is based on user searches.
This Expedia deal was found by Cheapflights users on 10/5. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/196:00 am -
2 stops13h 15m
Thu 11/266:45 am -
2 stops15h 55m
Deal found 10/5![Multiple Airlines logo]()
$1,112
One-way flights from Islip to Pierre Elliott Trudeau IntlSearch for one-way flight options from Islip to Pierre Elliott Trudeau Intl. Find affordable one-way fares based on user searches. Data last updated October 9, 2026.
Search for one-way flight options from Islip to Pierre Elliott Trudeau Intl. Find affordable one-way fares based on user searches. Data last updated October 9, 2026.
This Kiwi.com deal was found by Cheapflights users on 10/7. 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 11/69:33 pm -
3 stops18h 27m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/7![Multiple Airlines logo]()
$367
This KAYAK deal was found by Cheapflights users on 10/6. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/226:00 am -
2 stops11h 07m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/6![Multiple Airlines logo]()
$509
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 October 9, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $1,112 (Expedia) |
One-way from | $367 (Kiwi.com) |
Popular in | December |
Cheapest in | March |
Average price | $349 |
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 7,457,451 searches. Data last updated October 9, 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
Fly to
Route
Depart
Return
Cheapest round-trip
IslipMontreal
ISP Islip Long Island - YUL Montreal Pierre Elliott Trudeau Intl
ISPYUL
Islip Long Island
Fri 11/6
9:33 pm-4:00 pm
3 stops18h 27m
Montreal Pierre Elliott Trudeau Intl
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$367
Quickest round-trip
IslipMontreal
ISP Islip Long Island - YUL Montreal Pierre Elliott Trudeau Intl
ISPYUL
Islip Long Island
Thu 10/22
6:00 am-5:07 pm
2 stops11h 07m
Montreal Pierre Elliott Trudeau Intl
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$509
IslipMontreal
ISP Islip Long Island - YUL Montreal Pierre Elliott Trudeau Intl
ISPYUL
Islip Long Island
Fri 10/23
6:00 am-7:32 pm
2 stops13h 32m
Montreal Pierre Elliott Trudeau Intl
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$509
IslipMontreal
ISP Islip Long Island - YUL Montreal Pierre Elliott Trudeau Intl
ISPYUL
Islip Long Island
Thu 11/19
6:00 am-7:15 pm
2 stops13h 15m
Montreal Pierre Elliott Trudeau Intl
Thu 11/26
6:45 am-10:40 pm
2 stops15h 55m
$1,112
IslipMontreal
ISP Islip Long Island - YUL Montreal Pierre Elliott Trudeau Intl
ISPYUL
Islip Long Island
Sat 12/19
6:20 pm-4:32 pm
1 stop22h 12m
Montreal Pierre Elliott Trudeau Intl
Mon 12/21
5:25 pm-9:52 am
2 stops16h 27m
$1,380
IslipMontreal
ISP Islip Long Island - YUL Montreal Pierre Elliott Trudeau Intl
ISPYUL
Islip Long Island
Thu 12/24
6:20 pm-4:25 pm
1 stop22h 05m
Montreal Pierre Elliott Trudeau Intl
Mon 12/28
5:25 pm-9:52 am
2 stops16h 27m
$1,581
Sorted by cheapest first
- 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.
ISP-YUL
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.
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.
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 locationsCornwall
Longueuil
Laval
Dorval
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