Cheap flights from New York LaGuardia Airport to Los Angeles from $149

In general, October is the cheapest month to fly from New York LaGuardia Airport to Ontario. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $236. If you aren’t able to travel during the month of October, then book flights to Ontario from New York LaGuardia Airport during February instead. Flights to Ontario in February, while not as cheap as those in October, still average around $279.

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 Sunday, the most expensive travel day of the week, you can expect to see flight prices from New York LaGuardia Airport to Ontario for around $432.

In the evening is the cheapest time of day to fly from New York LaGuardia Airport to Ontario when you can find flight prices for as low as $327. 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 $336 on average. Flights to Ontario from New York LaGuardia Airport in the afternoon are generally more expensive because this time of day is more convenient for travelers’ schedules.

As of May 2026, prices for New York LaGuardia Airport to Ontario flights are approximately 63% more expensive when compared to flights at the same time last year.

Delta and Frontier are the most popular carriers operating from New York LaGuardia to Ontario

American Airlines, Southwest and Delta are the top three most popular airlines that fly to Ontario from New York LaGuardia Airport according to our data. American Airlines is the first choice among our users, with 41% 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.

Atlanta (ATL) was the most common stop: 50% of momondo users choosing 1-stop flights on this route connected there.

Flights via Denver (DEN) offer the lowest average round-trip price of $324.

Flights connecting via Atlanta (ATL) have the shortest average one-way travel time: 8h 25m.

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