Cheap flights from New York John F Kennedy Intl Airport to Los Angeles from $135

In general, January is the cheapest month to fly from New York John F Kennedy Intl Airport to Ontario. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $282. If you aren’t able to travel during the month of January, then book flights to Ontario from New York John F Kennedy Intl Airport during October instead. Flights to Ontario in October, while not as cheap as those in January, still average around $293.

The cheapest day to depart on your flight to Ontario is on a Friday when prices can be found for as low as $307. This is often the case because there is less demand to fly during this day of the week. When flying out on a Monday, the most expensive travel day of the week, you can expect to see flight prices from New York John F Kennedy Intl Airport to Ontario for around $387.

In the afternoon is the cheapest time of day to fly from New York John F Kennedy Intl Airport to Ontario when you can find flight prices for as low as $335. Flying to Ontario in the afternoon is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying in the evening when prices are $337 on average. Flights to Ontario from New York John F Kennedy Intl Airport in the evening are generally more expensive because this time of day is more convenient for travelers’ schedules.

Fly from New York John F Kennedy Intl to Ontario for the best New York John F Kennedy Intl - Ontario flight prices

You are more likely to see cheaper flights to Ontario from New York John F Kennedy Intl Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Ontario for around $366 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Ontario from New York John F Kennedy Intl Airport for as low as $260 on momondo.

There are 2 cabin classes available to choose from on New York John F Kennedy Intl to Ontario flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

You could potentially save up to 6% on your flight if you consider stops on a New York John F Kennedy Intl Airport to Ontario flight.

As of March 2026, prices for New York John F Kennedy Intl Airport to Ontario flights are approximately 15% more expensive when compared to flights at the same time last year.

Delta, JetBlue, and Alaska Airlines are the most popular carriers operating from New York John F Kennedy Intl to Ontario

JetBlue, Delta and Frontier are the top three most popular airlines that fly to Ontario from New York John F Kennedy Intl Airport according to our data. JetBlue is the first choice among our users, with 39% of people opting to fly with this airline when traveling to Ontario. Keep in mind that there are 7 different airlines that fly to Ontario on a routine basis, so you have a few additional options to choose from.