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Cheap flights from Islip, NY to Ontario from C$ 388

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 28/7. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — YYZ
2 Aug — 9 Aug1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Islip to Ontario

Enter your travel dates to find the best prices.

Cheapest flights from Islip to Ontario
Explore the most affordable flight options available from Islip to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 3 July 2026.

Mon 24/810:57 a.m.
ISP
-
YYZ
1 stop9h 08m
Multiple Airlines
Thu 27/87:45 a.m.
YYZ
-
ISP
1 stop10h 29m
Multiple Airlines
Deal found 30/6C$ 758
Fri 14/81:00 p.m.
ISP
-
YYZ
2 stops25h 05m
Multiple Airlines
Fri 21/84:50 p.m.
YYZ
-
ISP
1 stop17h 03m
Multiple Airlines
Deal found 30/6C$ 825
Fri 28/81:00 p.m.
ISP
-
YUL
2 stops11h 21m
Multiple Airlines
Mon 31/87:55 p.m.
YUL
-
ISP
1 stop13h 58m
Multiple Airlines
Deal found 1/7C$ 826
Thu 6/84:45 p.m.
ISP
-
YYZ
1 stop4h 55m
Multiple Airlines
Thu 13/84:45 p.m.
YYZ
-
ISP
2 stops41h 08m
Multiple Airlines
Deal found 28/6C$ 935
Tue 11/810:00 a.m.
ISP
-
YUL
1 stop8h 15m
Multiple Airlines
Tue 18/86:45 a.m.
YUL
-
ISP
2 stops27h 08m
Multiple Airlines
Deal found 28/6C$ 965
Wed 19/810:00 a.m.
ISP
-
YUL
1 stop8h 15m
Multiple Airlines
Mon 24/85:45 p.m.
YUL
-
ISP
2 stops40h 08m
Multiple Airlines
Deal found 28/6C$ 972
Sat 15/83:10 p.m.
ISP
-
YUL
1 stop27h 05m
Multiple Airlines
Sat 22/86:00 a.m.
YUL
-
ISP
2 stops8h 24m
Multiple Airlines
Deal found 1/7C$ 981
Wed 12/87:26 a.m.
ISP
-
YUL
1 stop10h 49m
Multiple Airlines
Wed 19/87:20 p.m.
YUL
-
ISP
2 stops22h 54m
Multiple Airlines
Deal found 28/6C$ 992
Tue 21/710:05 a.m.
ISP
-
YUL
1 stop8h 10m
Multiple Airlines
Thu 23/76:45 a.m.
YUL
-
ISP
2 stops27h 08m
Multiple Airlines
Deal found 1/7C$ 1,104
Sat 25/710:43 a.m.
ISP
-
YYZ
1 stop12h 52m
Multiple Airlines
Wed 29/76:00 a.m.
YYZ
-
ISP
2 stops7h 33m
Multiple Airlines
Deal found 30/6C$ 1,171
Sat 8/89:05 a.m.
ISP
-
YUL
1 stop9h 10m
Multiple Airlines
Sat 16/16:45 a.m.
YUL
-
ISP
2 stops32h 26m
Multiple Airlines
Deal found 29/6C$ 1,171
Wed 1/79:52 p.m.
ISP
-
YYZ
1 stop18h 53m
Multiple Airlines
Fri 3/74:50 p.m.
YYZ
-
ISP
1 stop17h 13m
Multiple Airlines
Deal found 28/6C$ 1,410

Find flight deals from Islip to Ontario

Keep the following information in mind while searching for Islip to Ontario flight deals. Data was last updated 3 July 2026.

Round-trip from

C$ 758

One-way from

C$ 388

Popular in

December

Cheapest in

April

Average price

C$ 430
24/8-27/8
  • 24/8-27/8
  • 2 total stops
  • 19h 37m total
  • Islip to Ontario
Search Deals
28/7
  • 28/7
  • 3 total stops
  • 28h 37m total
  • Islip to Ontario
Search Deals
Highest demand for flights based on searches. 5% potential increase in price (C$ 36 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 10 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Islip to Ontario 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 3 July 2026.
Use the filters below to find and compare flights from Islip to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

IslipToronto

ISP - YYZ

ISPYYZ

Islip Long Island

Mon 24/8

10:57 a.m.-8:05 p.m.

1 stop9h 08m

Toronto Pearson Intl

Thu 27/8

7:45 a.m.-6:14 p.m.

1 stop10h 29m

C$ 758

IslipToronto

ISP - YYZ

ISPYYZ

Islip Long Island

Fri 14/8

1:00 p.m.-2:05 p.m.

2 stops25h 05m

Toronto Pearson Intl

Fri 21/8

4:50 p.m.-9:53 a.m.

1 stop17h 03m

C$ 825

IslipMontreal

ISP - YUL

ISPYUL

Islip Long Island

Fri 28/8

1:00 p.m.-12:21 a.m.

2 stops11h 21m

Montreal Pierre Elliott Trudeau Intl

Mon 31/8

7:55 p.m.-9:53 a.m.

1 stop13h 58m

C$ 826

IslipMontreal

ISP - YUL

ISPYUL

Islip Long Island

Tue 11/8

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

1 stop8h 15m

Montreal Pierre Elliott Trudeau Intl

Tue 18/8

6:45 a.m.-9:53 a.m.

2 stops27h 08m

C$ 965

IslipMontreal

ISP - YUL

ISPYUL

Islip Long Island

Sat 15/8

3:10 p.m.-6:15 p.m.

1 stop27h 05m

Montreal Pierre Elliott Trudeau Intl

Sat 22/8

6:00 a.m.-2:24 p.m.

2 stops8h 24m

C$ 981

IslipMontreal

ISP - YUL

ISPYUL

Islip Long Island

Wed 12/8

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

1 stop10h 49m

Montreal Pierre Elliott Trudeau Intl

Wed 19/8

7:20 p.m.-6:14 p.m.

2 stops22h 54m

C$ 992

IslipToronto

ISP - YYZ

ISPYYZ

Islip Long Island

Thu 6/8

4:45 p.m.-9:40 p.m.

1 stop4h 55m

Toronto Pearson Intl

Thu 13/8

7:45 a.m.-9:53 a.m.

1 stop26h 08m

C$ 1,039

IslipMontreal

ISP - YUL

ISPYUL

Islip Long Island

Sat 8/8

9:05 a.m.-6:15 p.m.

1 stop9h 10m

Montreal Pierre Elliott Trudeau Intl

Sat 16/1

6:45 a.m.-3:11 p.m.

2 stops32h 26m

C$ 1,171

IslipMontreal

ISP - YUL

ISPYUL

Islip Long Island

Wed 19/8

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

1 stop8h 15m

Montreal Pierre Elliott Trudeau Intl

Mon 24/8

7:20 p.m.-5:41 p.m.

1 stop22h 21m

C$ 1,207

IslipToronto

ISP - YYZ

ISPYYZ

Islip Long Island

Sat 25/7

3:10 p.m.-10:05 p.m.

1 stop6h 55m

Toronto Pearson Intl

Wed 29/7

7:25 a.m.-5:41 p.m.

1 stop10h 16m

C$ 1,299

Flights are sorted by cheapest round-trip flights first.

Deals found on 30/6

Showing 1-10 of 14 resultsSorted by cheapest first
1
2

Best time to book a flight from Islip to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario 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 Ontario
No data available for this route at this time. Please check back soon.

Related info for your journey

Find useful and relevant information for your journey from Islip to Ontario. 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 Ontario?

    Islip Long Island (ISP), located 11.6 km from the city centre, is the airport you fly out of when you book flights from Islip to Ontario.

  • Can I find deals for flights from Islip to Ontario that include hotel bookings?

    Yes. In addition to deals on Islip to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Islip to Ontario?

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

  • Can I find deals for business class flights from Islip to Ontario?

    Yes. Cheapflights offers flight deals from Islip to Ontario 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

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Alternative routes for Islip to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
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John F Kennedy Intl to Halifax flights
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Rochester to Vancouver Intl flights
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Albany to Pearson Intl flights
LaGuardia to Saskatoon flights

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