Cheap flights from New York to Los Angeles from $104

In general, September 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 $333. If you aren’t able to travel during the month of September, then book flights to Ontario from New York during October instead. Flights to Ontario in October, while not as cheap as those in September, still average around $338.

The cheapest day to depart on your flight to Ontario is on a Wednesday when prices can be found for as low as $335. 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 $652.

In the afternoon is the cheapest time of day to fly from New York to Ontario when you can find flight prices for as low as $352. 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 $363 on average. Flights to Ontario from New York 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 - 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 $420 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.

You could potentially save up to 20% on your flight if you consider stops on a New York to Ontario flight.

As of August 2026, prices for New York to Ontario flights are approximately 6% cheaper when compared to flights at the same time last year.

Delta, Alaska Airlines, and United 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 39% 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: 30% of momondo users choosing 1-stop flights on this route connected there.

Flights via Dallas (DFW) offer the lowest average round-trip price of $306.

Flights connecting via Atlanta (ATL) have the shortest average one-way travel time: 7h 38m.

Atlanta (ATL) has the shortest average layover time for this route: 0h 47m.

As of August 2026, there are 1 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.

7 flights are operational weekly from New York to Ontario as of August 2026. The most popular departure day for this route is Mon, with 43% of flights per week taking off on this day.