Cheap flights from Utah to Los Angeles from $54

In general, June is the cheapest month to fly from Utah to Ontario. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $239. If you aren’t able to travel during the month of June, then book flights to Ontario from Utah during August instead. Flights to Ontario in August, while not as cheap as those in June, still average around $239.

The cheapest day to depart on your flight to Ontario is on a Tuesday when prices can be found for as low as $239. 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 Utah to Ontario for around $339.

At noon is the cheapest time of day to fly from Utah to Ontario when you can find flight prices for as low as $97. Flying to Ontario at noon 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 $308 on average. Flights to Ontario from Utah in the afternoon are generally more expensive because this time of day is more convenient for travelers’ schedules.

Fly from Salt Lake City to Ontario for the best Utah - Ontario flight prices

You are more likely to see cheaper flights to Ontario from Utah when booking weeks ahead of your departure date. In general, you can expect to find flights to Ontario for around $270 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Ontario from Utah for as low as $226 on momondo.

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

Frontier is the most popular carrier operating from Utah to Ontario

Frontier, Delta and Southwest are the top three most popular airlines that fly to Ontario from Utah according to our data. Frontier is the first choice among our users, with 44% 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.

The number of flights available between Utah and Ontario is 6 per day as of February 2026. The most frequent departure time is 3:00PM, with 48% of daily flights leaving in the evening.

As of February 2026, there are 48 flights per week flying from Utah to Ontario. The most common day of the week flights depart is Sun, with 21% of flights taking off on this day.