Cheap flights from Ontario to the United States from $121

In general, September is the cheapest month to fly from Region of Ontario to United States. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $282. If you aren’t able to travel during the month of September, then book flights to United States from Region of Ontario during January instead. Flights to United States in January, while not as cheap as those in September, still average around $283.

According to our data, Thursday is the cheapest day to fly to United States from Region of Ontario. The lowest ticket price found for a Thursday departure recently was $318. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. If your travel schedule is flexible, try to avoid departing on a Monday because tickets tend to average around $386. These prices are subject to change though, so be sure to set up a Price Alert for flights to United States.

The cheapest time of day to fly to United States is in the evening when flights can be purchased for as low as $297. Try not to purchase tickets in the afternoon because they tend to be around $363. Of course, these prices can vary depending on the time of year and what airport you fly to.

Fly from Toronto Island to Boston Logan Intl for the best Ontario - United States flight prices

You are more likely to see cheaper flights to United States from Region of Ontario when booking weeks ahead of your departure date. In general, you can expect to find flights to United States for around $293 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to United States from Region of Ontario for as low as $251 on momondo.

There are 4 cabin classes available to choose from on Region of Ontario to United States 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 Porter Airlines are the most popular carriers operating from Ontario to United States

Air Canada, Porter Airlines and WestJet are the top three most popular airlines that fly to United States from Region of Ontario according to our data. Air Canada is the first choice among our users, with 47% of people opting to fly with this airline when traveling to United States. Keep in mind that there are 9 different airlines that fly to United States on a routine basis, so you have a few additional options to choose from.

As of June 2026, there are 183 flights per day flying from Region of Ontario to United States. The most common time of day flights depart is 6:00PM, with 42% of flights taking off at noon.

As of June 2026, there are 1,282 flights per week flying from Region of Ontario to United States. The most common day of the week flights depart is Mon, with 16% of flights taking off on this day.