Cheap flights from Ontario to Boise from $99

The month of January is, on average, the cheapest month to fly to Boise from Ontario, with most prices found around $177. If you aren’t able to travel during the month of January, then book flights to Boise from Ontario during May instead. Flights to Boise in May, while not as cheap as those in January, still average around $217.

Our data shows that Saturday is the least expensive day to fly to Boise. Tickets to fly out on this day can be as low as $264. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around $369. These prices are subject to change though, so be sure to set up a Price Alert for flights to Boise.

Our data shows that the cheapest Ontario to Boise flights are usually those with departure times in the afternoon. Our users have found flights to Boise in the afternoon for as low as $227. In the evening is when there is more demand to fly to Boise, so prices are often more expensive at around $310 per ticket.

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

You are more likely to see cheaper flights to Boise from Ontario when booking weeks ahead of your departure date. In general, you can expect to find flights to Boise for around $309 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Boise from Ontario for as low as $137 on momondo.

There is only 1 cabin class available to choose from on Ontario to Boise 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 36% on your flight if you consider stops on a Ontario to Boise flight.

As of June 2026, prices for Ontario to Boise flights are approximately 85% more expensive when compared to flights at the same time last year.

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

Alaska Airlines, Delta and Allegiant Air are the top three most popular airlines that fly to Boise 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 Boise. Keep in mind that there are 7 different airlines that fly to Boise on a routine basis, so you have a few additional options to choose from.

Denver (DEN) was the most common stop: 50% of momondo users choosing 1-stop flights on this route connected there.

Flights via Denver (DEN) offer the lowest average round-trip price of $266.

Flights connecting via San Francisco (SFO) have the shortest average one-way travel time: 4h 52m.

San Francisco (SFO) has the shortest average layover time for this route: 1h 28m.

As of June 2026, 1 flights take off from Ontario and land in Boise each day. The most common flight departure time for this route is 4:00PM, with 100% of daily flights taking off in the afternoon.

The number of flights available between Ontario and Boise is 7 per week as of June 2026. The most frequent departure day is Mon, with 14% of weekly flights leaving on this day.