ISP - ONT

Find cheap flights from Islip to Ontario

1 adult
0 bags

Search hundreds of travel sites at once for deals on flights to Ontario

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Islip to Ontario, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Islip to Ontario, as well as popular online travel agencies
In the last 7 days travelers have searched 41,299,237 times on KAYAK, and here is why:

Save 23% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Bundle and saveSave money when you bundle your flight + hotel.

Cheap Flight Deals from Islip to Ontario (ISP-ONT)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Islip to Ontario that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Recent round-trip flight deals from Islip to Ontario

Recommended round-trip deals departing in the coming months from the most popular airlines that fly from Islip to Ontario.
Discover the best prices and deals for you by selecting your travel dates.
Choose your dates
ISP-ONT
2457 mimulti-stop
ONT-ISP
2457 mimulti-stop
Multiple Airlines
Find Deal

Flights from Islip to Ontario - Travel Insights & Trends

Get data-powered insights and trends into flights from Islip to Ontario to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest month to fly from Islip to Ontario?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Islip to Ontario, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.
The cheapest month for flights from Islip to Ontario is January, where tickets cost $255 (return) on average. On the other hand, the most expensive months are December and July, where the average cost of round-trip tickets is $528 and $469 respectively.

When to book flights from Islip to Ontario

Are your dates flexible? Find out the best times to travel from Islip to Ontario based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Islip to Ontario

  • Do I need a passport to fly between Islip and Ontario?

    Even though you are not required to have a passport, keep in mind that an official ID is needed to board the airplane.

  • Which aircraft models fly most regularly from Islip to Ontario?

    We unfortunately don’t have that data for this specific route.

  • How does KAYAK find such low prices on flights from Islip to Ontario?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Islip to Ontario.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Islip to Ontario?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Ontario from Islip is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Islip to Ontario?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Ontario with an airline and back to Islip with another airline. Booking your flights between Islip and ONT can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Islip to Ontario?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Ontario from Islip up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Book cheap flights from Islip to Ontario

One-way flight deals

multi-stopMultiple Airlines
2457 miISP-ONT

Search by stops

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

Information on your arrival and departure airports

Not what you’re looking for? Find thousands of other hotels, flights, car rentals and package deals with KAYAK.