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Cheap flights from Ontario to Islip, NY from C$ 323

YYZ — ISP
27 Sep — 4 Oct1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Ontario to Islip

Enter your travel dates to find the best prices.

Cheapest flights from Ontario to Islip

Wed 23/97:45 a.m. -
1 stop9h 13m
Fri 25/98:39 p.m. -
1 stop24h 01m
Deal found 26/8C$ 613
Thu 17/99:50 a.m. -
1 stop7h 08m
Mon 21/95:43 p.m. -
1 stop22h 57m
Deal found 25/8C$ 621
Fri 11/97:45 a.m. -
1 stop9h 13m
Sun 13/96:48 p.m. -
1 stop20h 07m
Deal found 24/8C$ 705
Fri 18/97:45 a.m. -
1 stop9h 13m
Sun 20/95:28 p.m. -
2 stops21h 27m
Deal found 25/8C$ 860
Fri 9/107:45 a.m. -
1 stop10h 15m
Mon 12/106:55 p.m. -
2 stops26h 00m
Deal found 26/8C$ 1,108
Sun 6/97:00 a.m. -
2 stops26h 53m
Wed 9/910:05 a.m. -
1 stop5h 39m
Deal found 25/8C$ 1,116
Tue 13/106:45 a.m. -
2 stops14h 52m
Sat 24/106:00 a.m. -
2 stops11h 07m
Deal found 26/8C$ 1,136
Fri 4/99:50 a.m. -
1 stop8h 24m
Sat 5/97:09 p.m. -
2 stops26h 16m
Deal found 28/8C$ 1,229

Find flight deals from Ontario to Islip

Round-trip from

C$ 613

One-way from

C$ 323

Popular in

August

Cheapest in

January

Average price

C$ 405
23/9-25/9
  • 23/9-25/9
  • 2 total stops
  • 33h 14m total
  • Ontario to Islip
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11/9
  • 11/9
  • 1 total stop
  • 9h 13m total
  • Ontario to Islip
Search Deals
Highest demand for flights based on searches. 6% potential increase in price (C$ 34 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 7 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 2026
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Cheapflights Fare Finder

 
Use the filters below to find and compare flights from Ontario to Islip that are best for you.

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Route

Depart

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Price

Cheapest round-trip

TorontoIslip

YYZ Toronto Pearson Intl - ISP Islip Long Island

YYZISP

Toronto Pearson Intl

Wed 23/9

7:45 a.m.-4:58 p.m.

1 stop9h 13m

Islip Long Island

Fri 25/9

8:39 p.m.-8:40 p.m.

1 stop24h 01m

C$ 613

TorontoIslip

YYZ Toronto Pearson Intl - ISP Islip Long Island

YYZISP

Toronto Pearson Intl

Thu 17/9

9:50 a.m.-4:58 p.m.

1 stop7h 08m

Islip Long Island

Mon 21/9

5:43 p.m.-4:40 p.m.

1 stop22h 57m

C$ 621

TorontoIslip

YYZ Toronto Pearson Intl - ISP Islip Long Island

YYZISP

Toronto Pearson Intl

Fri 11/9

7:45 a.m.-4:58 p.m.

1 stop9h 13m

Islip Long Island

Sun 13/9

6:48 p.m.-2:55 p.m.

1 stop20h 07m

C$ 705

TorontoIslip

YYZ Toronto Pearson Intl - ISP Islip Long Island

YYZISP

Toronto Pearson Intl

Fri 18/9

7:45 a.m.-4:58 p.m.

1 stop9h 13m

Islip Long Island

Sun 20/9

6:48 p.m.-2:55 p.m.

1 stop20h 07m

C$ 896

TorontoIslip

YYZ Toronto Pearson Intl - ISP Islip Long Island

YYZISP

Toronto Pearson Intl

Fri 9/10

7:45 a.m.-6:00 p.m.

1 stop10h 15m

Islip Long Island

Mon 12/10

6:55 p.m.-8:55 p.m.

2 stops26h 00m

C$ 1,108
Quickest round-trip

MontrealIslip

YUL Montreal Pierre Elliott Trudeau Intl - ISP Islip Long Island

YULISP

Montreal Pierre Elliott Trudeau Intl

Tue 13/10

6:45 a.m.-9:37 p.m.

2 stops14h 52m

Islip Long Island

Sat 24/10

6:00 a.m.-5:07 p.m.

2 stops11h 07m

C$ 1,136
Cheapest one-way
Quickest one-way

TorontoIslip

YYZ Toronto Pearson Intl - ISP Islip Long Island

YYZISP

Toronto Pearson Intl

Fri 11/9

7:45 a.m.-4:58 p.m.

1 stop9h 13m

C$ 323

MontrealIslip

YUL Montreal Pierre Elliott Trudeau Intl - ISP Islip Long Island

YULISP

Montreal Pierre Elliott Trudeau Intl

Fri 18/9

9:00 a.m.-4:58 p.m.

3 stops31h 58m

C$ 441

MontrealIslip

YUL Montreal Pierre Elliott Trudeau Intl - ISP Islip Long Island

YULISP

Montreal Pierre Elliott Trudeau Intl

Fri 9/10

3:15 p.m.-5:30 p.m.

2 stops26h 15m

C$ 454

MontrealIslip

YUL Montreal Pierre Elliott Trudeau Intl - ISP Islip Long Island

YULISP

Montreal Pierre Elliott Trudeau Intl

Mon 18/1

8:05 a.m.-8:01 p.m.

2 stops11h 56m

C$ 1,591

Flights are sorted by cheapest round-trip flights first.

Deals found on 24/8

Sorted by cheapest first

Best time to book a flight from Ontario to Islip

Have a flexible travel schedule? Discover the best time to fly to Islip from Ontario with our price prediction graph.
Estimated round-trip price

Cheapflights Insights

Everything you need to know about your flight from Ontario to Islip

No data available for this route at this time. Please check back soon.

Related info for your journey

  • What airport do you fly into for flights to Islip from Ontario?

    For a flight from Ontario to Islip, you will be flying into Long Island. Islip Long Island (ISP) is just 11.6 km from the centre of the city.

  • What are the most popular routes from Region of Ontario to Islip, New York?

    When deciding which route to take from Region of Ontario to Islip, New York consider Toronto Pearson Intl - Islip Long Island, Montreal Pierre Elliott Trudeau Intl - Islip Long Island or Ottawa - Islip Long Island as they are the most popular.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Ontario 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.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for Ontario to Islip

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