Cheap flights from Ontario to Idaho from $78

In general, January is the cheapest month to fly from Ontario to Idaho. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $177. If you don’t want to visit Idaho in January, then you should wait until May to fly from Ontario, when ticket prices are also cheap, with an average price of $237.

Our data shows that Tuesday is the least expensive day to fly to Idaho. Tickets to fly out on this day can be as low as $177. 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 $380.

According to our data, the cheapest time of day to fly to Idaho is at noon. momondo users have found flights departing from Ontario to Idaho at noon for as low as $167. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. In the afternoon is when there is more demand to fly to Idaho, so prices are often more expensive at around $303 per ticket.

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

You are more likely to see cheaper flights to Idaho from Ontario when booking weeks ahead of your departure date. In general, you can expect to find flights to Idaho for around $298 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Idaho from Ontario for as low as $137 on momondo.

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

Delta, United Airlines, and Alaska Airlines are the most popular carriers operating from Ontario to Idaho

Alaska Airlines, Allegiant Air and Delta are the top three most popular airlines that fly to Idaho from Ontario according to our data. Alaska Airlines is the first choice among our users, with 42% of people opting to fly with this airline when traveling to Idaho. Keep in mind that there are 8 different airlines that fly to Idaho on a routine basis, so you have a few additional options to choose from.

The number of flights available between Ontario and Idaho is 1 per day as of August 2026. The most frequent departure time is 4:00PM, with 70% of daily flights leaving in the afternoon.

10 flights are operational weekly from Ontario to Idaho as of August 2026. The most popular departure day for this route is Mon, with 20% of flights per week taking off on this day.