Cheap flights from Idaho to Los Angeles from $83

In general, April is the cheapest month to fly from Idaho to Ontario. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $262. If you aren’t able to travel during the month of April, then book flights to Ontario from Idaho during September instead. Flights to Ontario in September, while not as cheap as those in April, still average around $266.

The cheapest day to depart on your flight to Ontario is on a Tuesday when prices can be found for as low as $177. 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 Idaho to Ontario for around $450.

In the afternoon is the cheapest time of day to fly from Idaho to Ontario when you can find flight prices for as low as $217. Flying to Ontario in the afternoon is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying at noon when prices are $377 on average. Flights to Ontario from Idaho at noon are generally more expensive because this time of day is more convenient for travelers’ schedules.

Fly from Boise Air Term. Gowen Fld to Ontario for the best Idaho - Ontario flight prices

You are more likely to see cheaper flights to Ontario from Idaho when booking weeks ahead of your departure date. In general, you can expect to find flights to Ontario for around $345 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Ontario from Idaho for as low as $158 on momondo.

There are 2 cabin classes available to choose from on Idaho to Ontario flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Frontier, Southwest, and Delta are the most popular carriers operating from Idaho to Ontario

Alaska Airlines, Allegiant Air and Delta are the top three most popular airlines that fly to Ontario from Idaho according to our data. Alaska Airlines is the first choice among our users, with 43% 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.

As of August 2026, there are 1 flights per day flying from Idaho to Ontario. The most common time of day flights depart is 2:00PM, with 62% of flights taking off in the afternoon.

9 flights are operational weekly from Idaho to Ontario as of August 2026. The most popular departure day for this route is Mon, with 22% of flights per week taking off on this day.