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$249+ 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 5/26. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — YYZ
may. 24 — may. 311
dom. 5/24
dom. 5/31
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 abril 24, 2026.

This Kiwi.com deal was found by Cheapflights users on 4/22. 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.
sáb. 6/611:00 am
ISP
-
YOW
2 stops13h 20m
Multiple Airlines
sáb. 6/137:00 am
YOW
-
ISP
1 stop27h 03m
Multiple Airlines
Deal found 4/22$351
This Kiwi.com deal was found by Cheapflights users on 4/22. 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.
mar. 6/94:41 pm
ISP
-
YYZ
2 stops29h 14m
Multiple Airlines
vie. 6/194:50 pm
YYZ
-
ISP
1 stop17h 13m
Multiple Airlines
Deal found 4/22$364
This Kiwi.com deal was found by Cheapflights users on 4/22. 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.
sáb. 6/611:00 am
ISP
-
YYZ
2 stops34h 55m
Multiple Airlines
vie. 6/194:50 pm
YYZ
-
ISP
1 stop17h 13m
Multiple Airlines
Deal found 4/22$370
This Kiwi.com deal was found by Cheapflights users on 4/22. 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.
sáb. 6/611:00 am
ISP
-
YYZ
2 stops34h 55m
Multiple Airlines
mar. 6/169:50 am
YYZ
-
ISP
1 stop24h 13m
Multiple Airlines
Deal found 4/22$373
This Kiwi.com deal was found by Cheapflights users on 4/22. 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.
mié. 6/1010:48 am
ISP
-
YYZ
1 stop9h 17m
Multiple Airlines
vie. 6/194:50 pm
YYZ
-
ISP
1 stop17h 13m
Multiple Airlines
Deal found 4/22$376
This Kiwi.com deal was found by Cheapflights users on 4/22. 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.
mié. 6/1010:48 am
ISP
-
YYZ
1 stop9h 17m
Multiple Airlines
mar. 6/169:50 am
YYZ
-
ISP
1 stop24h 13m
Multiple Airlines
Deal found 4/22$379
This Kiwi.com deal was found by Cheapflights users on 4/22. 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.
vie. 6/58:31 pm
ISP
-
YYZ
1 stop24h 09m
Multiple Airlines
vie. 6/194:50 pm
YYZ
-
ISP
1 stop17h 13m
Multiple Airlines
Deal found 4/22$384
This Kiwi.com deal was found by Cheapflights users on 4/22. 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.
vie. 6/58:31 pm
ISP
-
YYZ
1 stop24h 09m
Multiple Airlines
mar. 6/169:50 am
YYZ
-
ISP
1 stop24h 13m
Multiple Airlines
Deal found 4/22$386
This Kiwi.com deal was found by Cheapflights users on 4/22. 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.
mar. 6/94:41 pm
ISP
-
YYZ
2 stops29h 14m
Multiple Airlines
dom. 6/144:50 pm
YYZ
-
ISP
1 stop17h 13m
Multiple Airlines
Deal found 4/22$387
This Kiwi.com deal was found by Cheapflights users on 4/22. 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.
mié. 6/1010:48 am
ISP
-
YYZ
1 stop9h 17m
Multiple Airlines
jue. 6/187:45 am
YYZ
-
ISP
1 stop26h 18m
Multiple Airlines
Deal found 4/22$398
This Kiwi.com deal was found by Cheapflights users on 4/22. 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.
mié. 6/1010:48 am
ISP
-
YYZ
1 stop9h 17m
Multiple Airlines
sáb. 6/207:45 am
YYZ
-
ISP
1 stop26h 18m
Multiple Airlines
Deal found 4/22$399
This Kiwi.com deal was found by Cheapflights users on 4/22. 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.
mar. 6/94:41 pm
ISP
-
YYZ
1 stop24h 04m
Multiple Airlines
mar. 6/169:50 am
YYZ
-
ISP
1 stop24h 13m
Multiple Airlines
Deal found 4/22$400

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 abril 24, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$351
(Kiwi.com)

One-way from

$249
(Kiwi.com)

Popular in

December

Cheapest in

May

Average price

$269
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. 10% potential increase in price ($33 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($6 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 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 abril 24, 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

IslipOttawa

ISP - YOW

ISPYOW

Islip Long Island

sáb. 6/6

11:00 am-12:20 am

2 stops13h 20m

Ottawa

sáb. 6/13

7:00 am-10:03 am

1 stop27h 03m

$351

IslipToronto

ISP - YYZ

ISPYYZ

Islip Long Island

lun. 8/10

10:48 am-8:05 pm

1 stop9h 17m

Toronto Pearson Intl

vie. 8/14

8:10 am-7:05 pm

1 stop10h 55m

$498

IslipToronto

ISP - YYZ

ISPYYZ

Islip Long Island

jue. 5/28

11:00 am-11:35 am

2 stops24h 35m

Toronto Pearson Intl

dom. 5/31

4:50 pm-10:05 am

1 stop17h 15m

$506

IslipToronto

ISP - YYZ

ISPYYZ

Islip Long Island

dom. 6/7

11:00 am-4:45 pm

1 stop29h 45m

Toronto Pearson Intl

dom. 6/14

4:50 pm-10:03 am

1 stop17h 13m

$514

IslipToronto

ISP - YYZ

ISPYYZ

Islip Long Island

vie. 6/19

8:31 pm-8:40 pm

1 stop24h 09m

Toronto Pearson Intl

lun. 6/22

8:10 am-7:05 pm

1 stop10h 55m

$538

IslipToronto

ISP - YYZ

ISPYYZ

Islip Long Island

vie. 5/22

2:28 pm-7:35 pm

2 stops29h 07m

Toronto Pearson Intl

vie. 5/29

8:10 am-5:58 pm

1 stop9h 48m

$565

IslipToronto

ISP - YYZ

ISPYYZ

Islip Long Island

sáb. 6/6

11:00 am-8:05 pm

1 stop9h 05m

Toronto Pearson Intl

lun. 6/15

8:10 am-7:05 pm

1 stop10h 55m

$607

IslipToronto

ISP - YYZ

ISPYYZ

Islip Long Island

jue. 6/4

11:00 am-4:45 pm

1 stop29h 45m

Toronto Pearson Intl

jue. 6/11

7:45 am-10:03 am

1 stop26h 18m

$615

IslipOttawa

ISP - YOW

ISPYOW

Islip Long Island

mié. 6/3

7:25 am-4:53 pm

1 stop9h 28m

Ottawa

mié. 6/10

7:00 am-10:03 am

2 stops27h 03m

$654

IslipToronto

ISP - YYZ

ISPYYZ

Islip Long Island

mar. 5/19

12:30 pm-10:00 pm

2 stops9h 30m

Toronto Pearson Intl

jue. 5/21

9:50 am-10:05 am

1 stop24h 15m

$664

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/23

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?

    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 - Ottawa and Islip Long Island - Montreal Pierre Elliott Trudeau Intl.

  • 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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