$384+ Cheap flights from Islip, NY (ISP) to Montreal (YMQ)
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 1/25. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — YMQ
Jan 11 — Jan 181
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from Islip to Montreal 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 Montreal
Cheapest flights from Islip to MontrealExplore the most affordable flight options available from Islip to Montreal. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 12, 2025.
Explore the most affordable flight options available from Islip to Montreal. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 12, 2025.
This Kiwi.com deal was found by Cheapflights users on 12/10. 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 12/191:27 pmISP - YUL
1 stop11h 03mMultiple Airlines
Tue 12/235:10 pmYUL - ISP
2 stops26h 31mMultiple Airlines
Deal found 12/10![Multiple Airlines logo]()
$752
Find flight deals from Islip to Montreal
Discover tips and strategies to find the most affordable flight options for your journey from Islip (ISP) to Montreal (YMQ). 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 December 12, 2025.
Most accurate provider | eDreams 3 stars |
|---|---|
Most trusted provider | eDreams 3 stars |
Round-trip from | $384 (Kiwi.com) |
Popular in | December |
Cheapest in | April |
Average price | $364 |
Cheapflights Fare Finder
Customize your flight search to find flights from Islip to Montreal 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 December 12, 2025.
Use the filters below to find and compare flights from Islip to Montreal that are best for you.
Fly from
Islip
Fly to
Montreal
Route
Depart
Return
Price
IslipMontreal
ISP - YUL
ISPYUL
Islip Long Island
Sun 1/25
9:25 am-12:30 am
1 stop15h 05m
Montreal Pierre Elliott Trudeau Intl
Sun 2/1
8:00 am-8:05 pm
2 stops36h 05m
$384
IslipMontreal
ISP - YUL
ISPYUL
Islip Long Island
Tue 1/6
12:43 pm-2:54 pm
1 stop26h 11m
Montreal Pierre Elliott Trudeau Intl
Tue 1/13
8:55 pm-6:55 pm
2 stops22h 00m
$975
IslipMontreal
ISP - YUL
ISPYUL
Islip Long Island
Sun 12/21
7:40 pm-4:25 pm
2 stops20h 45m
$1,035
IslipMontreal
ISP - YUL
ISPYUL
Islip Long Island
Mon 12/22
7:40 pm-4:25 pm
2 stops20h 45m
$1,035
Compare providers for flights from Islip to Montreal
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Islip to Montreal in December.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*1 star |
- Most accurate provider: When it comes to deals on Islip, New York-Montreal flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Islip, New York-Montreal flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Islip, New York-Montreal flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Islip, New York-Montreal flights, Cheapflights users trust eDreams the most. eDreams 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 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 Montreal
Have a flexible travel schedule? Discover the best time to fly to Montreal 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
What is the cheapest month to book a flight from Islip, New York to Montreal?
Currently, February is the cheapest month in which you can book a flight from Islip, New York to Montreal (average of $91). Flying from Islip, New York to Montreal 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.