Cheap flights from Boise to Los Angeles from $98

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 $227. If you aren’t able to travel during the month of January, then book flights to Ontario from Boise during April instead. Flights to Ontario in April, while not as cheap as those in January, still average around $277.

The cheapest day to depart on your flight to Ontario is on a Monday when prices can be found for as low as $197. 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 $357.

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 $223. 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 $357 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 $318 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 are 3 cabin classes available to choose from on Boise 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 19% on your flight if you consider stops on a Boise to Ontario flight.

As of October 2026, prices for Boise to Ontario flights are approximately 8% cheaper when compared to flights at the same time last year.

Alaska Airlines, Frontier, and Southwest 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 48% of people opting to fly with this airline when traveling to Ontario. Keep in mind that there are 7 different airlines that fly to Ontario on a routine basis, so you have a few additional options to choose from.

Denver (DEN) was the most common stop: 83% of momondo users choosing 1-stop flights on this route connected there.

Flights via Denver (DEN) offer the lowest average round-trip price of $259.

Flights connecting via Salt Lake City (SLC) have the shortest average one-way travel time: 3h 55m.

Salt Lake City (SLC) has the shortest average layover time for this route: 0h 40m.

As of October 2026, there are 1 flights per day flying from Boise to Ontario. The most common time of day flights depart is 4:00PM, with 100% of flights taking off in the afternoon.

As of October 2026, there are 7 flights per week flying from Boise to Ontario. The most common day of the week flights depart is Mon, with 14% of flights taking off on this day.