Cheap flights from Los Angeles to Ontario from $142

The month of October is, on average, the cheapest month to fly to Region of Ontario from Los Angeles, with most prices found around $338. If you aren’t able to travel during the month of October, then book flights to Region of Ontario from Los Angeles during September instead. Flights to Region of Ontario in September, while not as cheap as those in October, still average around $346.

According to our data, Tuesday is the cheapest day to fly to Region of Ontario from Los Angeles. The lowest ticket price found for a Tuesday departure recently was $522. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. Flights from Los Angeles to Region of Ontario on a Sunday will generally be more expensive and average around $694. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

According to our data, the cheapest time of day to fly to Region of Ontario is at noon. momondo users have found flights departing from Los Angeles to Region of Ontario at noon for as low as $430. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights in the morning are often more expensive with an average ticket price of $662.

Fly from Los Angeles to Toronto Pearson Intl for the best Los Angeles - Ontario flight prices

You are more likely to see cheaper flights to Region of Ontario from Los Angeles when booking weeks ahead of your departure date. In general, you can expect to find flights to Region of Ontario for around $438 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Region of Ontario from Los Angeles for as low as $367 on momondo.

There are 4 cabin classes available to choose from on Los Angeles to Region of Ontario flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

WestJet, United Airlines, and Air Canada are the most popular carriers operating from Los Angeles to Ontario

Air Canada, Porter Airlines and United Airlines are the top three most popular airlines that fly to Region of Ontario from Los Angeles according to our data. Air Canada is the first choice among our users, with 55% of people opting to fly with this airline when traveling to Region of Ontario. Keep in mind that there are 8 different airlines that fly to Region of Ontario on a routine basis, so you have a few additional options to choose from.

As of August 2026, 27 flights take off from Los Angeles and land in Region of Ontario each day. The most common flight departure time for this route is 7:00AM, with 41% of daily flights taking off at noon.

The number of flights available between Los Angeles and Region of Ontario is 190 per week as of August 2026. The most frequent departure day is Sun, with 16% of weekly flights leaving on this day.