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$91+ Cheap flights from Islip (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 11/4. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — YYZ
Nov 15 — Nov 221
Sat 11/15
Sat 11/22
1 adult, Economy
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Find 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 October 16, 2025.

This Kiwi.com deal was found by Cheapflights users on 10/14. 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.
Mon 11/104:58 pmISP - YYZ
1 stop7h 27mMultiple Airlines
Mon 11/175:15 pmYYZ - ISP
1 stop24h 27mMultiple Airlines
Deal found 10/14$223
This Kiwi.com deal was found by Cheapflights users on 10/15. 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 11/1311:40 amISP - YYZ
2 stops9h 39mMultiple Airlines
Thu 11/205:15 pmYYZ - ISP
1 stop17h 22mMultiple Airlines
Deal found 10/15$292
This Kiwi.com deal was found by Cheapflights users on 10/13. 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.
Thu 10/2311:40 amISP - YYZ
2 stops12h 01mMultiple Airlines
Mon 10/275:15 pmYYZ - ISP
1 stop24h 27mMultiple Airlines
Deal found 10/13$404
This Kiwi.com deal was found by Cheapflights users on 10/15. 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.
Sat 11/298:47 amISP - YYZ
1 stop29h 33mMultiple Airlines
Sat 12/610:15 amYYZ - ISP
2 stops24h 45mMultiple Airlines
Deal found 10/15$459
This Kiwi.com deal was found by Cheapflights users on 10/15. 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.
Sat 11/298:47 amISP - YUL
1 stop15h 43mMultiple Airlines
Sat 12/66:45 amYUL - ISP
2 stops50h 26mMultiple Airlines
Deal found 10/15$618
This Kiwi.com deal was found by Cheapflights users on 10/15. 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 10/169:37 pmISP - YYZ
1 stop16h 15mMultiple Airlines
Sat 10/187:45 amYYZ - ISP
2 stops12h 20mMultiple Airlines
Deal found 10/15$834
This United deal was found by Cheapflights users on 10/16. 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 United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2212:40 pmISP - YYZ
2 stops20h 51mMultiple Airlines
Thu 10/2312:45 pmYYZ - ISP
2 stops22h 19mMultiple Airlines
Deal found 10/16$2,534
This United deal was found by Cheapflights users on 10/16. 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 United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/207:30 amISP - YUL
1 stop9h 35mMultiple Airlines
Mon 12/228:05 amYUL - ISP
1 stop26h 59mMultiple Airlines
Deal found 10/16$2,555

Cheap flight deals from Islip to Ontario

Keep the following information in mind while searching for Islip to Ontario flight deals. Data was last updated October 16, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$223
(Kiwi.com)

One-way from

$91
(Trip.com)

Popular in

November

Cheapest in

May

Average price

$303
Provider with most accurate pricing for New York (NYC)-Toronto (YTO) flight deals.
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Provider most trusted by Cheapflights users for New York (NYC)-Toronto (YTO) flights.
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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. 15% potential increase in price ($49 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($9 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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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 October 16, 2025.
Use the filters below to find and compare flights from Islip to Ontario that are best for you.

Fly from

Islip

Fly to

Ontario

Route

Depart

Return

Price

IslipToronto

ISP - YYZ

ISPYYZ

Islip Long Island

Mon 11/10

4:58 pm-12:25 am

1 stop7h 27m

Toronto Pearson Intl

Mon 11/17

5:15 pm-5:42 pm

1 stop24h 27m

$223

IslipToronto

ISP - YYZ

ISPYYZ

Islip Long Island

Thu 11/13

11:40 am-9:19 pm

2 stops9h 39m

Toronto Pearson Intl

Thu 11/20

5:15 pm-10:37 am

1 stop17h 22m

$292

IslipToronto

ISP - YYZ

ISPYYZ

Islip Long Island

Sat 11/29

8:47 am-2:20 pm

1 stop29h 33m

Toronto Pearson Intl

Sat 12/6

10:15 am-11:00 am

2 stops24h 45m

$459

IslipMontreal

ISP - YUL

ISPYUL

Islip Long Island

Sat 11/29

8:47 am-12:30 am

1 stop15h 43m

Montreal Pierre Elliott Trudeau Intl

Sat 12/6

6:45 am-9:11 am

2 stops50h 26m

$618

IslipMontreal

ISP - YUL

ISPYUL

Islip Long Island

Sat 12/20

7:30 am-5:05 pm

1 stop9h 35m

Montreal Pierre Elliott Trudeau Intl

Mon 12/22

8:05 am-11:04 am

1 stop26h 59m

$2,555

IslipToronto

ISP - YYZ

ISPYYZ

Islip Long Island

Tue 11/4

6:27 pm-12:11 am

1 stop29h 44m

$91

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/15

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

What is the cheapest month to book a flight from Islip to Region of Ontario?

Currently, May is the cheapest month in which you can book a flight from Islip to Region of Ontario (average of $84). Flying from Islip to Region of Ontario in December is currently the most expensive (average of $128). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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 to Region of Ontario?

    The most popular flight routes from Islip 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.

  • What is the cheapest month to book a flight from Islip to Region of Ontario?

    Currently, May is the cheapest month in which you can book a flight from Islip to Region of Ontario (average of $84). Flying from Islip to Region of Ontario in December is currently the most expensive (average of $128). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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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