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Cheap flights from Montreal Pierre Elliott Trudeau Intl Airport to Islip, NY from C$ 483

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 23/7. Fares are subject to change and may not be available on all flights or dates of travel.
YUL — ISP
9 Jul — 16 Jul1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Pierre Elliott Trudeau Intl to Islip

Enter your travel dates to find the best prices.

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 9 June 2026.

Wed 8/77:20 p.m.
YUL
-
ISP
2 stops38h 33m
Multiple Airlines
Wed 15/77:26 a.m.
ISP
-
YUL
1 stop10h 49m
Multiple Airlines
Deal found 8/6C$ 1,057
Thu 11/66:45 a.m.
YUL
-
ISP
2 stops14h 12m
Multiple Airlines
Sun 14/69:52 p.m.
ISP
-
YUL
2 stops21h 40m
Multiple Airlines
Deal found 5/6C$ 1,116
Mon 6/77:20 p.m.
YUL
-
ISP
1 stop15h 36m
Multiple Airlines
Fri 10/77:00 a.m.
ISP
-
YUL
1 stop11h 15m
Multiple Airlines
Deal found 8/6C$ 1,204
Fri 12/66:50 p.m.
YUL
-
ISP
2 stops18h 43m
Multiple Airlines
Sun 14/69:00 a.m.
ISP
-
YUL
1 stop9h 15m
Multiple Airlines
Deal found 4/6C$ 1,530

Find 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 9 June 2026.

Round-trip from

C$ 1,057

One-way from

C$ 483

Popular in

December

Cheapest in

October

Average price

C$ 377
8/7-15/7
  • 8/7-15/7
  • 3 total stops
  • 49h 22m total
  • Montreal to Islip
Search Deals
23/7
  • 23/7
  • 3 total stops
  • 23h 18m total
  • Montreal to Islip
Search Deals
Highest demand for flights based on searches. 2% potential increase in price (C$ 16 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 8 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2026
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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 629,999 searches. Data last updated 9 June 2026.
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

Fly to

Route

Depart

Return

Price

Cheapest round-trip

MontrealIslip

YUL - ISP

YULISP

Montreal Pierre Elliott Trudeau Intl

Wed 8/7

7:20 p.m.-9:53 a.m.

2 stops38h 33m

Islip Long Island

Wed 15/7

7:26 a.m.-6:15 p.m.

1 stop10h 49m

C$ 1,057
Quickest round-trip

MontrealIslip

YUL - ISP

YULISP

Montreal Pierre Elliott Trudeau Intl

Mon 6/7

7:20 p.m.-10:56 a.m.

1 stop15h 36m

Islip Long Island

Fri 10/7

7:00 a.m.-6:15 p.m.

1 stop11h 15m

C$ 1,204
Cheapest one-way

MontrealIslip

YUL - ISP

YULISP

Montreal Pierre Elliott Trudeau Intl

Thu 23/7

10:35 a.m.-9:53 a.m.

3 stops23h 18m

C$ 483

MontrealIslip

YUL - ISP

YULISP

Montreal Pierre Elliott Trudeau Intl

Mon 24/8

10:35 a.m.-8:15 p.m.

2 stops9h 40m

C$ 800
Quickest one-way

MontrealIslip

YUL - ISP

YULISP

Montreal Pierre Elliott Trudeau Intl

Sun 23/8

8:25 a.m.-12:30 p.m.

1 stop4h 05m

C$ 1,520

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/6

Sorted by cheapest first

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.

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?

    Most people fly into Islip Long Island (ISP) if they book a flight to Islip from Montreal Pierre Elliott Trudeau Intl. On average, Long Island has 0 inbound flights from Montreal Pierre Elliott Trudeau Intl per day from 0 airlines. Islip Long Island is conveniently located just 11.6 km from Islip’s city centre.

  • 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.

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