Cheap flights from London Heathrow Airport to Montreal from C$ 583

The cheapest month to fly to Montreal from London Heathrow Airport is in September. Flight prices, which tend to average around C$ 754, 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 London Heathrow Airport during October instead. Flights to Montreal in October, while not as cheap as those in September, still average around C$ 791.

Our data shows that Sunday is the least expensive day to fly to Montreal. Tickets to fly out on this day can be as low as C$ 854. When flying out on a Thursday, the most expensive travel day of the week, you can expect to see flight prices from London Heathrow Airport to Montreal for around C$ 988.

Our data shows that the cheapest London Heathrow Airport to Montreal flights are usually those with departure times in the morning. Our users have found flights to Montreal in the morning for as low as C$ 887. Flights in the afternoon are often more expensive with an average ticket price of C$ 1,002.

Fly from London Heathrow to Montreal Pierre Elliott Trudeau Intl for the best London Heathrow - Montreal flight prices

You are more likely to see cheaper flights to Montreal from London Heathrow Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Montreal for around C$ 914 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Montreal from London Heathrow Airport for as low as C$ 836 on momondo.

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

No. A direct flight is the cheapest option for a flight between London Heathrow Airport to Montreal.

As of March 2026, prices for London Heathrow Airport to Montreal flights are approximately 14% more expensive when compared to flights at the same time last year.

Delta and British Airways are the most popular carriers operating from London Heathrow to Montreal

Air Canada, Lufthansa and British Airways are the top three most popular airlines that fly to Montreal from London Heathrow Airport according to our data. Air Canada is the first choice among our users, with 57% of people opting to fly with this airline when travelling to Montreal. Keep in mind that there are 3 different airlines that fly to Montreal on a routine basis, so you have a few additional options to choose from.

Historically, on average around 9% of flights between London and Montreal have experienced a delay on any given week. The average delay length over the past 12 months has been 158 minutes.

Generally, flights departing in the morning tend to experience fewer delays. Flights departing in the evening have, in the past, seen delays more frequently in comparison.

Tuesday is statistically the day of the week that experiences the fewest delays on this flight route. Sunday has historically seen more delays on average compared to the rest of the week.

According to our data, Air Canada has had the least delays on this route over the last 12 months, with about 6% of their flights experiencing any sort of delay.

The number of flights available between London Heathrow Airport and Montreal is 11 per day as of March 2026. The most frequent departure time is 1:00p.m., with 100% of daily flights leaving in the afternoon.

The number of flights available between London Heathrow Airport and Montreal is 83 per week as of March 2026. The most frequent departure day is Mon, with 16% of weekly flights leaving on this day.