Find flights
When to book
FAQs

Cheap flights from Islip, NY to Ontario

ISP — YYZ
19 Nov — 26 Nov1
1 adult
1 adult, Economy, 0 bags

Find flight deals from Islip to Ontario

Popular in

November

Cheapest in

April

Average price

C$ 491
Highest demand for flights based on searches. 9% potential increase in price (C$ 68 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 11 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2026
Search Deals

Related info for your journey

  • 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

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for Islip to Ontario

John F Kennedy Intl to Pearson Intl flights
Newark to Pierre Elliott Trudeau Intl flights
Newark to Pearson Intl flights
Newark to Toronto Island flights
LaGuardia to Pierre Elliott Trudeau Intl flights
LaGuardia to Pearson Intl flights
John F Kennedy Intl to Pierre Elliott Trudeau Intl flights
Newark to Vancouver Intl flights
John F Kennedy Intl to Vancouver Intl flights
LaGuardia to Toronto Island flights
Newark to Calgary flights
Newark to Québec City flights
LaGuardia to Vancouver Intl flights
John F Kennedy Intl to Calgary flights
John F Kennedy Intl to Toronto Island flights
Newark to Hamilton flights
LaGuardia to Québec City flights
LaGuardia to Calgary flights
Newark to Halifax flights
John F Kennedy Intl to Québec City flights
Newark to Ottawa flights
LaGuardia to Ottawa flights
John F Kennedy Intl to Ottawa flights
LaGuardia to Halifax flights
Newark to Winnipeg flights
LaGuardia to Winnipeg flights
White Plains to Pierre Elliott Trudeau Intl flights
John F Kennedy Intl to Winnipeg flights
John F Kennedy Intl to Halifax flights
LaGuardia to Hamilton flights
Newark to Edmonton flights
LaGuardia to Kelowna flights
John F Kennedy Intl to Kelowna flights
LaGuardia to Edmonton flights
John F Kennedy Intl to Edmonton flights
Buffalo to Québec City flights
Buffalo to Vancouver Intl flights
LaGuardia to St. John's flights
Newark to Kelowna flights
Newark to St. John's flights
Buffalo to Pearson Intl flights
Albany to Vancouver Intl flights
Newark to Charlottetown flights
Albany to Pearson Intl flights
Buffalo to Pierre Elliott Trudeau Intl flights
Newark to London flights

Fly with Cheapflights

How does Cheapflights help users find flights from Islip to Ontario?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Ontario from Islip today with Cheapflights!

Why should you use Cheapflights to find cheap flight tickets from Islip to Ontario?

Cheapflights helps you find that perfect flight to Ontario from Islip by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from Islip to Ontario with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Islip to Ontario flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from Islip to Ontario become cheaper?

Not ready to book yet? You can track prices for flights from Islip to Ontario on Cheapflights with our Price Alert feature and get notified when better prices are available.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.