Cheap flights from New York to Los Angeles from $137

In general, December is the cheapest month to fly from New York to Ontario. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $71. If you aren’t able to travel during the month of December, then book flights to Ontario from New York during July instead. Flights to Ontario in July, while not as cheap as those in December, still average around $77.

The cheapest day to depart on your flight to Ontario is on a Tuesday when prices can be found for as low as $297. 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 to Ontario for around $643.

In the evening is the cheapest time of day to fly from New York to Ontario when you can find flight prices for as low as $336. Flying to Ontario in the evening 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 afternoon when prices are $341 on average. Flights to Ontario from New York in the afternoon 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 - Ontario flight prices

You are more likely to see cheaper flights to Ontario from New York when booking weeks ahead of your departure date. In general, you can expect to find flights to Ontario for around $408 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 for as low as $168 on momondo.

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

Frontier, JetBlue, and Alaska Airlines are the most popular carriers operating from New York to Ontario

United Airlines, JetBlue and Delta are the top three most popular airlines that fly to Ontario from New York according to our data. United Airlines is the first choice among our users, with 37% of people opting to fly with this airline when traveling to Ontario. Keep in mind that there are 9 different airlines that fly to Ontario on a routine basis, so you have a few additional options to choose from.

Phoenix (PHX) was the most common stop: 43% of momondo users choosing 1-stop flights on this route connected there.

Flights via Las Vegas (LAS) offer the lowest average round-trip price of $199.

Flights connecting via Dallas (DFW) have the shortest average one-way travel time: 7h 29m.

Atlanta (ATL) has the shortest average layover time for this route: 1h 00m.

As of June 2026, there are 2 flights per day flying from New York to Ontario. The most common time of day flights depart is 7:00PM, with 100% of flights taking off in the evening.

15 flights are operational weekly from New York to Ontario as of June 2026. The most popular departure day for this route is Mon, with 20% of flights per week taking off on this day.