$348+ 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 9/15. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — YUL
Oct 10 — Oct 171
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
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
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
Cheapest
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 September 10, 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 September 10, 2026.
This Expedia deal was found by Cheapflights users on 9/6. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/216:00 am -
2 stops13h 32m
Wed 10/286:45 am -
2 stops14h 52m
Deal found 9/6![Multiple Airlines logo]()
$787
This Expedia deal was found by Cheapflights users on 9/7. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/236:00 am -
2 stops13h 32m
Fri 10/306:45 am -
2 stops14h 52m
Deal found 9/7![Multiple Airlines logo]()
$1,277
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 September 10, 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 September 10, 2026.
This Expedia deal was found by Cheapflights users on 9/6. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/216:00 am -
2 stops13h 32m
Wed 10/286:45 am -
2 stops14h 52m
Deal found 9/6![Multiple Airlines logo]()
$787
This Orbitz deal was found by Cheapflights users on 9/9. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 1/85:50 am -
2 stops13h 25m
Tue 1/126:45 am -
2 stops14h 55m
Deal found 9/9![Multiple Airlines logo]()
$971
This Expedia deal was found by Cheapflights users on 9/9. 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.
Sun 1/105:50 am -
2 stops16h 30m
Fri 1/158:00 am -
1 stop13h 40m
Deal found 9/9![Multiple Airlines logo]()
$1,273
This Expedia deal was found by Cheapflights users on 9/7. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/236:00 am -
2 stops13h 32m
Fri 10/306:45 am -
2 stops14h 52m
Deal found 9/7![Multiple Airlines logo]()
$1,277
Last-minute flights from Islip to Pierre Elliott Trudeau IntlDiscover last-minute flight deals from Islip to Pierre Elliott Trudeau Intl. Data last updated September 10, 2026 and is based on user searches.
Discover last-minute flight deals from Islip to Pierre Elliott Trudeau Intl. Data last updated September 10, 2026 and is based on user searches.
This Expedia deal was found by Cheapflights users on 9/6. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/216:00 am -
2 stops13h 32m
Wed 10/286:45 am -
2 stops14h 52m
Deal found 9/6![Multiple Airlines logo]()
$787
This Expedia deal was found by Cheapflights users on 9/7. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/236:00 am -
2 stops13h 32m
Fri 10/306:45 am -
2 stops14h 52m
Deal found 9/7![Multiple Airlines logo]()
$1,277
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 September 10, 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 September 10, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/8. 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.
Tue 9/155:43 pm -
2 stops25h 49m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Multiple Airlines logo]()
$348
This KAYAK deal was found by Cheapflights users on 9/8. 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.
Wed 11/116:00 am -
2 stops13h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Multiple Airlines logo]()
$517
This KAYAK deal was found by Cheapflights users on 9/8. 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.
Tue 11/106:00 am -
2 stops13h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Multiple Airlines logo]()
$562
This KAYAK deal was found by Cheapflights users on 9/8. 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.
Sun 11/86:00 am -
1 stop10h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Multiple Airlines logo]()
$564
This KAYAK deal was found by Cheapflights users on 9/8. 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.
Sat 11/76:00 am -
1 stop10h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Multiple Airlines logo]()
$601
This KAYAK deal was found by Cheapflights users on 9/8. 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.
Fri 11/136:00 am -
2 stops13h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Multiple Airlines logo]()
$615
This KAYAK deal was found by Cheapflights users on 9/8. 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.
Mon 11/96:00 am -
2 stops13h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Multiple Airlines logo]()
$627
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 September 10, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $787 (Expedia) |
One-way from | $348 (Kiwi.com) |
Popular in | December |
Cheapest in | March |
Average price | $343 |
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 September 10, 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
Tue 9/15
5:43 pm-7:32 pm
2 stops25h 49m
Montreal Pierre Elliott Trudeau Intl
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$348
IslipMontreal
ISP Islip Long Island - YUL Montreal Pierre Elliott Trudeau Intl
ISPYUL
Islip Long Island
Tue 11/10
6:00 am-7:15 pm
2 stops13h 15m
Montreal Pierre Elliott Trudeau Intl
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$562
Quickest round-trip
IslipMontreal
ISP Islip Long Island - YUL Montreal Pierre Elliott Trudeau Intl
ISPYUL
Islip Long Island
Sun 11/8
6:00 am-4:25 pm
1 stop10h 25m
Montreal Pierre Elliott Trudeau Intl
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$564
IslipMontreal
ISP Islip Long Island - YUL Montreal Pierre Elliott Trudeau Intl
ISPYUL
Islip Long Island
Sat 11/7
6:00 am-4:25 pm
1 stop10h 25m
Montreal Pierre Elliott Trudeau Intl
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$601
IslipMontreal
ISP Islip Long Island - YUL Montreal Pierre Elliott Trudeau Intl
ISPYUL
Islip Long Island
Fri 11/13
6:00 am-7:15 pm
2 stops13h 15m
Montreal Pierre Elliott Trudeau Intl
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$615
IslipMontreal
ISP Islip Long Island - YUL Montreal Pierre Elliott Trudeau Intl
ISPYUL
Islip Long Island
Wed 10/21
6:00 am-7:32 pm
2 stops13h 32m
Montreal Pierre Elliott Trudeau Intl
Wed 10/28
6:45 am-9:37 pm
2 stops14h 52m
$787
IslipMontreal
ISP Islip Long Island - YUL Montreal Pierre Elliott Trudeau Intl
ISPYUL
Islip Long Island
Fri 1/8
5:50 am-7:15 pm
2 stops13h 25m
Montreal Pierre Elliott Trudeau Intl
Tue 1/12
6:45 am-9:40 pm
2 stops14h 55m
$971
IslipMontreal
ISP Islip Long Island - YUL Montreal Pierre Elliott Trudeau Intl
ISPYUL
Islip Long Island
Sun 1/10
5:50 am-10:20 pm
2 stops16h 30m
Montreal Pierre Elliott Trudeau Intl
Fri 1/15
8:00 am-9:40 pm
1 stop13h 40m
$1,273
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
Fri 10/30
6:45 am-9:37 pm
2 stops14h 52m
$1,277
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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