Cheap flights from Boise to Los Angeles from $76

In general, January is the cheapest month to fly from Boise to Ontario. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $232. If you aren’t able to travel during the month of January, then book flights to Ontario from Boise during August instead. Flights to Ontario in August, while not as cheap as those in January, still average around $235.

The cheapest day to depart on your flight to Ontario is on a Saturday when prices can be found for as low as $147. 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 Boise to Ontario for around $427.

In the afternoon is the cheapest time of day to fly from Boise to Ontario when you can find flight prices for as low as $224. 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 $287 on average. Flights to Ontario from Boise 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 Boise Air Term. Gowen Fld - Ontario flight prices

You are more likely to see cheaper flights to Ontario from Boise when booking weeks ahead of your departure date. In general, you can expect to find flights to Ontario for around $329 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Ontario from Boise for as low as $158 on momondo.

There is only 1 cabin class available to choose from on Boise Air Term. Gowen Fld to Ontario flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

You could potentially save up to 12% on your flight if you consider stops on a Boise to Ontario flight.

As of April 2026, prices for Boise to Ontario flights are approximately 182% more expensive when compared to flights at the same time last year.

Frontier, Southwest, and Alaska Airlines are the most popular carriers operating from Boise Air Term. Gowen Fld to Ontario

Alaska Airlines, Delta and Southwest are the top three most popular airlines that fly to Ontario from Boise according to our data. Alaska Airlines is the first choice among our users, with 41% 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.