Cheap flights from Ontario to Phoenix from $57

If you are unable to visit Phoenix during the month of January, then departing from Ontario during the month November is also very affordable. Most momondo users find prices during this month for around $49.

On average, the least expensive day to fly to Phoenix from Ontario is on a Friday. momondo users have found tickets for Friday departures for as low as $221. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Sunday is the most expensive day to depart from Ontario because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $320.

The cheapest time of day to fly to Phoenix is at noon when flights can be purchased for as low as $185. In the afternoon is when there is more demand to fly to Phoenix, so prices are often more expensive at around $300 per ticket.

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

You are more likely to see cheaper flights to Phoenix from Ontario when booking weeks ahead of your departure date. In general, you can expect to find flights to Phoenix for around $260 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Phoenix from Ontario for as low as $171 on momondo.

Southwest, Frontier, and United Airlines are the most popular carriers operating from Ontario to Phoenix

Frontier, Southwest and American Airlines are the top three most popular airlines that fly to Phoenix from Ontario 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 Phoenix. Keep in mind that there are 10 different airlines that fly to Phoenix on a routine basis, so you have a few additional options to choose from.

As of May 2026, 9 flights take off from Ontario and land in Phoenix each day. The most common flight departure time for this route is 12:00PM, with 60% of daily flights taking off in the afternoon.

The number of flights available between Ontario and Phoenix is 66 per week as of May 2026. The most frequent departure day is Mon, with 18% of weekly flights leaving on this day.