Cheap flights from Arizona to Los Angeles from $34

In general, May is the cheapest month to fly from Arizona to Ontario. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $45. If you aren’t able to travel during the month of May, then book flights to Ontario from Arizona during December instead. Flights to Ontario in December, while not as cheap as those in May, still average around $58.

The cheapest day to depart on your flight to Ontario is on a Saturday when prices can be found for as low as $245. 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 Arizona to Ontario for around $356.

In the morning is the cheapest time of day to fly from Arizona to Ontario when you can find flight prices for as low as $268. Flying to Ontario in the morning 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 $346 on average. Flights to Ontario from Arizona in the evening are generally more expensive because this time of day is more convenient for travelers’ schedules.

Fly from Phoenix Sky Harbor Intl to Ontario for the best Arizona - Ontario flight prices

You are more likely to see cheaper flights to Ontario from Arizona when booking weeks ahead of your departure date. In general, you can expect to find flights to Ontario for around $252 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Ontario from Arizona for as low as $165 on momondo.

There are 3 cabin classes available to choose from on Arizona to Ontario flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Southwest, United Airlines, and American Airlines are the most popular carriers operating from Arizona to Ontario

Frontier, American Airlines and Southwest are the top three most popular airlines that fly to Ontario from Arizona according to our data. Frontier is the first choice among our users, with 46% of people opting to fly with this airline when traveling to Ontario. Keep in mind that there are 8 different airlines that fly to Ontario on a routine basis, so you have a few additional options to choose from.

15 flights are operational daily from Arizona to Ontario as of June 2026. The most popular departure time for this route is 8:00PM, with 39% of flights per day taking off in the evening.

As of June 2026, there are 106 flights per week flying from Arizona to Ontario. The most common day of the week flights depart is Sun, with 19% of flights taking off on this day.