Cheap flights from Ontario to North America from $36

The month of September is, on average, the cheapest month to fly to North America from Ontario, with most prices found around $281. If you are unable to visit North America during the month of September, then departing from Ontario during the month August is also very affordable. Most momondo users find prices during this month for around $296.

The cheapest day to depart from Ontario to North America is on a Sunday. Travelers who choose to depart for North America on a Sunday will often find tickets for as low as $337. Be sure to avoid booking your departure on a Thursday as prices are generally higher than usual. According to our data, the average ticket price to North America on Thursday is $409.

Fly from Ontario to San Francisco for the best Ontario - North America flight prices

You are more likely to see cheaper flights to North America from Ontario when booking weeks ahead of your departure date. In general, you can expect to find flights to North America for around $350 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to North America from Ontario for as low as $271 on momondo.

No. A direct flight is the cheapest option for a flight between Ontario to North America.

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

Frontier, Spirit Airlines and American Airlines are the top three most popular airlines that fly to North America from Ontario according to our data. Frontier is the first choice among our users, with 36% of people opting to fly with this airline when traveling to North America. Keep in mind that there are 12 different airlines that fly to North America on a routine basis, so you have a few additional options to choose from.

As of May 2026, there are 53 flights per day flying from Ontario to North America. The most common time of day flights depart is 7:00AM, with 53% of flights taking off at noon.

As of May 2026, 375 flights take off from Ontario and land in North America each week. The most common flight departure day for this route is Sun, with 20% of weekly flights taking off on this day.