Cheap flights from London to Montreal from C$ 448

The cheapest month to fly to Montreal from London is in September. Flight prices, which tend to average around C$ 837, 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 during January instead. Flights to Montreal in January, while not as cheap as those in September, still average around C$ 872.

Our data shows that Tuesday is the least expensive day to fly to Montreal. Tickets to fly out on this day can be as low as C$ 994. When flying out on a Monday, the most expensive travel day of the week, you can expect to see flight prices from London to Montreal for around C$ 1,135.

Our data shows that the cheapest London 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$ 1,022. Flights in the afternoon are often more expensive with an average ticket price of C$ 1,322.

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

You are more likely to see cheaper flights to Montreal from London when booking weeks ahead of your departure date. In general, you can expect to find flights to Montreal for around C$ 1,031 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Montreal from London for as low as C$ 997 on momondo.

There are 3 cabin classes available to choose from on London 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 to Montreal.

As of September 2026, prices for London to Montreal flights are approximately 37% cheaper when compared to flights at the same time last year.

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

Air Canada, British Airways and Lufthansa are the top three most popular airlines that fly to Montreal from London according to our data. Air Canada is the first choice among our users, with 60% 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 12% 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 156 minutes.

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

Sunday is statistically the day of the week that experiences the fewest delays on this flight route. Thursday 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 7% of their flights experiencing any sort of delay.

16 flights are operational daily from London to Montreal as of September 2026. The most popular departure time for this route is 2:00p.m., with 46% of flights per day taking off in the afternoon.

The number of flights available between London and Montreal is 112 per week as of September 2026. The most frequent departure day is Wed, with 17% of weekly flights leaving on this day.