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$214+ Cheap flights from Islip, NY (ISP) to Ontario

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 8/21. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — YYZ
Jul 18 — Jul 251
Sat 7/18
Sat 7/25
1 adult, Economy
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Cheap flight deals from Islip to Ontario

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 June 18, 2026.

This Kiwi.com deal was found by Cheapflights users on 6/15. 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.
Thu 9/104:13 pm
ISP
-
YYZ
1 stop22h 17m
Multiple Airlines
Tue 9/159:30 am
YYZ
-
ISP
2 stops31h 53m
Multiple Airlines
Deal found 6/15$530
This Kiwi.com deal was found by Cheapflights users on 6/14. 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.
Sat 7/410:48 am
ISP
-
YYZ
1 stop12h 47m
Multiple Airlines
Fri 7/107:45 am
YYZ
-
ISP
1 stop26h 08m
Multiple Airlines
Deal found 6/14$558
This Kiwi.com deal was found by Cheapflights users on 6/15. 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.
Mon 6/299:52 pm
ISP
-
YYZ
1 stop18h 53m
Multiple Airlines
Fri 7/34:50 pm
YYZ
-
ISP
1 stop17h 13m
Multiple Airlines
Deal found 6/15$575
This Kiwi.com deal was found by Cheapflights users on 6/14. 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.
Thu 8/272:11 pm
ISP
-
YYZ
1 stop7h 54m
Multiple Airlines
Mon 8/318:10 am
YYZ
-
ISP
2 stops29h 18m
Multiple Airlines
Deal found 6/14$610
This Kiwi.com deal was found by Cheapflights users on 6/16. 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 7/312:28 pm
ISP
-
YYZ
2 stops26h 17m
Multiple Airlines
Fri 8/77:45 am
YYZ
-
ISP
1 stop26h 08m
Multiple Airlines
Deal found 6/16$622
This Kiwi.com deal was found by Cheapflights users on 6/16. 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.
Thu 7/97:26 am
ISP
-
YUL
1 stop10h 49m
Multiple Airlines
Thu 7/166:45 am
YUL
-
ISP
2 stops27h 08m
Multiple Airlines
Deal found 6/16$690
This Kiwi.com deal was found by Cheapflights users on 6/15. 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.
Wed 7/157:26 am
ISP
-
YUL
1 stop10h 49m
Multiple Airlines
Wed 7/227:20 pm
YUL
-
ISP
2 stops38h 33m
Multiple Airlines
Deal found 6/15$716
This Kiwi.com deal was found by Cheapflights users on 6/18. 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.
Sat 7/1810:43 am
ISP
-
YUL
2 stops31h 32m
Multiple Airlines
Sat 7/257:20 pm
YUL
-
ISP
1 stop15h 10m
Multiple Airlines
Deal found 6/18$753
This Kiwi.com deal was found by Cheapflights users on 6/17. 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.
Sat 8/110:43 am
ISP
-
YUL
2 stops30h 02m
Multiple Airlines
Sat 8/87:20 pm
YUL
-
ISP
1 stop17h 10m
Multiple Airlines
Deal found 6/17$762
This Kiwi.com deal was found by Cheapflights users on 6/13. 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.
Sat 7/47:00 am
ISP
-
YUL
1 stop11h 15m
Multiple Airlines
Fri 7/106:45 am
YUL
-
ISP
2 stops27h 08m
Multiple Airlines
Deal found 6/13$792

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 June 18, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$530
(Kiwi.com)

One-way from

$214
(Kiwi.com)

Popular in

December

Cheapest in

April

Average price

$290
Provider with most accurate pricing for New York (NYC)-Toronto (YTO) flight deals.
Search Deals
Provider most trusted by Cheapflights users for New York (NYC)-Toronto (YTO) flights.
Search Deals
From Islip Long Island to Ontario
Search Deals
One-way flight from Islip Long Island to Ontario
Search Deals
Highest demand for flights based on searches. 6% potential increase in price ($21 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($4 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 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 2,558,603 searches. Data last updated June 18, 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

Thu 9/10

4:13 pm-2:30 pm

1 stop22h 17m

Toronto Pearson Intl

Tue 9/15

9:30 am-5:23 pm

2 stops31h 53m

$530

IslipToronto

ISP - YYZ

ISPYYZ

Islip Long Island

Sat 7/4

10:48 am-11:35 pm

1 stop12h 47m

Toronto Pearson Intl

Fri 7/10

7:45 am-9:53 am

1 stop26h 08m

$558

IslipToronto

ISP - YYZ

ISPYYZ

Islip Long Island

Fri 7/31

2:28 pm-4:45 pm

2 stops26h 17m

Toronto Pearson Intl

Fri 8/7

7:45 am-9:53 am

1 stop26h 08m

$622

IslipToronto

ISP - YYZ

ISPYYZ

Islip Long Island

Thu 8/27

4:45 pm-10:05 pm

1 stop5h 20m

Toronto Pearson Intl

Mon 8/31

9:50 am-3:56 pm

1 stop30h 06m

$675

IslipMontreal

ISP - YUL

ISPYUL

Islip Long Island

Thu 7/9

7:26 am-6:15 pm

1 stop10h 49m

Montreal Pierre Elliott Trudeau Intl

Thu 7/16

6:45 am-9:53 am

2 stops27h 08m

$690

IslipToronto

ISP - YYZ

ISPYYZ

Islip Long Island

Wed 7/15

10:57 am-8:05 pm

1 stop9h 08m

Toronto Pearson Intl

Wed 7/22

5:50 pm-6:06 pm

2 stops24h 16m

$706

IslipMontreal

ISP - YUL

ISPYUL

Islip Long Island

Sat 8/1

10:43 am-4:45 pm

2 stops30h 02m

Montreal Pierre Elliott Trudeau Intl

Sat 8/8

7:20 pm-12:30 pm

1 stop17h 10m

$762

IslipMontreal

ISP - YUL

ISPYUL

Islip Long Island

Sat 7/4

7:00 am-6:15 pm

1 stop11h 15m

Montreal Pierre Elliott Trudeau Intl

Fri 7/10

6:45 am-9:53 am

2 stops27h 08m

$792
Quickest round-trip

IslipToronto

ISP - YYZ

ISPYYZ

Islip Long Island

Wed 7/1

7:26 am-5:01 pm

2 stops9h 35m

Toronto Pearson Intl

Sat 7/4

8:30 am-6:35 pm

2 stops10h 05m

$2,794
Cheapest one-way

IslipToronto

ISP - YYZ

ISPYYZ

Islip Long Island

Fri 8/21

8:31 pm-8:40 pm

1 stop24h 09m

$214

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/18

Showing 1-10 of 15 resultsSorted by cheapest first
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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?

    If you book a flight to Ontario from Islip, you will be flying from Long Island, which is the city’s only airport. Islip Long Island (ISP) is located 7.2 mi from the center of Islip.

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

    The most popular flight routes from Islip, New York to Region of Ontario are Islip Long Island - Toronto Pearson Intl, Islip Long Island - Montreal Pierre Elliott Trudeau Intl and Islip Long Island - Ottawa.

  • 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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