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Cheap flights from Islip, NY to Montreal Pierre Elliott Trudeau Intl Airport from C$ 1,060

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 15/6. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — YUL
16 jun. — 23 jun.1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Islip to Pierre Elliott Trudeau Intl

Enter your travel dates to find the best prices.

Cheapest flights from Islip to Pierre Elliott Trudeau Intl
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 17 mayo 2026.

lun. 15/610:00 a.m.
ISP
-
YUL
1 stop8h 15m
Multiple Airlines
lun. 22/612:50 p.m.
YUL
-
ISP
2 stops22h 06m
Multiple Airlines
Deal found 16/5C$ 1,060
mar. 9/62:11 p.m.
ISP
-
YUL
2 stops23h 29m
Multiple Airlines
lun. 15/67:20 p.m.
YUL
-
ISP
1 stop15h 36m
Multiple Airlines
Deal found 14/5C$ 1,078
sáb. 25/79:00 a.m.
ISP
-
YUL
1 stop9h 15m
Multiple Airlines
jue. 30/77:20 p.m.
YUL
-
ISP
2 stops38h 38m
Multiple Airlines
Deal found 13/5C$ 1,083
jue. 25/610:00 a.m.
ISP
-
YUL
1 stop8h 15m
Multiple Airlines
sáb. 27/67:00 a.m.
YUL
-
ISP
2 stops10h 29m
Multiple Airlines
Deal found 13/5C$ 1,090
lun. 29/69:52 p.m.
ISP
-
YUL
2 stops21h 40m
Multiple Airlines
lun. 6/77:20 p.m.
YUL
-
ISP
1 stop15h 36m
Multiple Airlines
Deal found 15/5C$ 1,123
mié. 27/57:25 a.m.
ISP
-
YUL
1 stop10h 50m
Multiple Airlines
dom. 31/56:45 a.m.
YUL
-
ISP
2 stops27h 20m
Multiple Airlines
Deal found 14/5C$ 1,192
mar. 30/65:27 p.m.
ISP
-
YUL
2 stops24h 48m
Multiple Airlines
mar. 7/77:20 p.m.
YUL
-
ISP
1 stop15h 36m
Multiple Airlines
Deal found 16/5C$ 1,203
lun. 6/710:00 a.m.
ISP
-
YUL
1 stop8h 15m
Multiple Airlines
sáb. 11/76:45 a.m.
YUL
-
ISP
2 stops27h 18m
Multiple Airlines
Deal found 12/5C$ 1,212

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 17 mayo 2026.

Round-trip from

C$ 1,078

Popular in

December

Cheapest in

March

Average price

C$ 499
9/6-15/6
  • 9/6-15/6
  • 3 total stops
  • 39h 05m total
  • Islip to Montreal
Search Deals
Highest demand for flights based on searches. 4% potential increase in price (C$ 31 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 9 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 2026
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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 629,999 searches. Data last updated 17 mayo 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

Price

Cheapest round-trip

IslipMontreal

ISP - YUL

ISPYUL

Islip Long Island

lun. 15/6

10:00 a.m.-6:15 p.m.

1 stop8h 15m

Montreal Pierre Elliott Trudeau Intl

lun. 22/6

12:50 p.m.-10:56 a.m.

2 stops22h 06m

C$ 1,060

IslipMontreal

ISP - YUL

ISPYUL

Islip Long Island

mar. 9/6

2:11 p.m.-1:40 p.m.

2 stops23h 29m

Montreal Pierre Elliott Trudeau Intl

lun. 15/6

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

1 stop15h 36m

C$ 1,078
Quickest round-trip

IslipMontreal

ISP - YUL

ISPYUL

Islip Long Island

jue. 25/6

10:00 a.m.-6:15 p.m.

1 stop8h 15m

Montreal Pierre Elliott Trudeau Intl

sáb. 27/6

7:00 a.m.-5:29 p.m.

2 stops10h 29m

C$ 1,090

IslipMontreal

ISP - YUL

ISPYUL

Islip Long Island

lun. 29/6

9:52 p.m.-7:32 p.m.

2 stops21h 40m

Montreal Pierre Elliott Trudeau Intl

lun. 6/7

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

1 stop15h 36m

C$ 1,123

IslipMontreal

ISP - YUL

ISPYUL

Islip Long Island

mié. 27/5

7:25 a.m.-6:15 p.m.

1 stop10h 50m

Montreal Pierre Elliott Trudeau Intl

dom. 31/5

6:45 a.m.-10:05 a.m.

2 stops27h 20m

C$ 1,192

IslipMontreal

ISP - YUL

ISPYUL

Islip Long Island

mar. 30/6

5:27 p.m.-6:15 p.m.

2 stops24h 48m

Montreal Pierre Elliott Trudeau Intl

mar. 7/7

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

1 stop15h 36m

C$ 1,203

IslipMontreal

ISP - YUL

ISPYUL

Islip Long Island

lun. 6/7

10:00 a.m.-6:15 p.m.

1 stop8h 15m

Montreal Pierre Elliott Trudeau Intl

sáb. 11/7

6:45 a.m.-10:03 a.m.

2 stops27h 18m

C$ 1,212

IslipMontreal

ISP - YUL

ISPYUL

Islip Long Island

vie. 29/5

7:25 a.m.-6:15 p.m.

1 stop10h 50m

Montreal Pierre Elliott Trudeau Intl

dom. 31/5

10:35 a.m.-7:45 p.m.

2 stops9h 10m

C$ 1,331

Flights are sorted by cheapest round-trip flights first.

Deals found on 16/5

Sorted by cheapest first

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.
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.

  • What airport do you fly from for flights from Islip to Montreal Pierre Elliott Trudeau Intl?

    Located just 11.6 km from the city centre, Islip Long Island is the airport most travellers will use when flying to Montreal Pierre Elliott Trudeau Intl from Islip. Booking flights from Long Island (ISP) to Montreal Pierre Elliott Trudeau Intl should be relatively easy as there are 0 daily outbound flights to Montreal Pierre Elliott Trudeau Intl from 0 different airlines.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Islip to Pierre Elliott Trudeau Intl by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Travelling 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 locations
Laval
Trois-Rivières
Dorval
Brossard
Sherbrooke
Cornwall
Longueuil
Montebello
Boucherville
Magog
Saint-Jean-sur-Richelieu
Bromont
Drummondville
North Hatley
Saint-Sauveur
Louiseville

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