Cheap flights from Ontario to Montreal from C$ 135

The cheapest month to fly to Montreal from Region of Ontario is in September. Flight prices, which tend to average around C$ 380, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of September, then book flights to Montreal from Region of Ontario during October instead. Flights to Montreal in October, while not as cheap as those in September, still average around C$ 391.

Our data shows that Friday is the least expensive day to fly to Montreal. Tickets to fly out on this day can be as low as C$ 888. When flying out on a Monday, the most expensive travel day of the week, you can expect to see flight prices from Region of Ontario to Montreal for around C$ 1,199.

Our data shows that the cheapest Region of Ontario to Montreal flights are usually those with departure times in the evening. Our users have found flights to Montreal in the evening for as low as C$ 874. Flights at noon are often more expensive with an average ticket price of C$ 1,111.

Fly from Hamilton to Montreal St Hubert for the best Ontario - Montreal flight prices

You are more likely to see cheaper flights to Montreal from Region of Ontario when booking weeks ahead of your departure date. In general, you can expect to find flights to Montreal for around C$ 391 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Montreal from Region of Ontario for as low as C$ 257 on momondo.

There are 4 cabin classes available to choose from on Region of Ontario to Montreal flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Porter Airlines, WestJet, and Air Canada are the most popular carriers operating from Ontario to Montreal

Porter Airlines, WestJet and Air Canada are the top three most popular airlines that fly to Montreal from Region of Ontario according to our data. Porter Airlines is the first choice among our users, with 41% of people opting to fly with this airline when travelling to Montreal. Keep in mind that there are 4 different airlines that fly to Montreal on a routine basis, so you have a few additional options to choose from.

The number of flights available between Region of Ontario and Montreal is 119 per day as of July 2026. The most frequent departure time is 3:00p.m., with 40% of daily flights leaving in the afternoon.

As of July 2026, 837 flights take off from Region of Ontario and land in Montreal each week. The most common flight departure day for this route is Fri, with 17% of weekly flights taking off on this day.