Cheap flights from Montreal to London from C$ 407

The month of November is, on average, the cheapest month to fly to London Heathrow Airport from Montreal, with most prices found around C$ 864. If you aren’t able to travel to London Heathrow Airport during the month of November, then flying in May is also cheap. Prices for this month can be found on momondo for an average of C$ 904.

According to our data, Sunday is the cheapest day to fly to London Heathrow Airport from Montreal. The lowest ticket price found for a Sunday departure recently was C$ 1,057. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. When flying out on a Monday, the most expensive travel day of the week, you can expect to see flight prices from Montreal to London Heathrow Airport for around C$ 1,149.

Our data shows that the cheapest Montreal to London Heathrow Airport flights are usually those with departure times in the afternoon. Our users have found flights to London Heathrow Airport in the afternoon for as low as C$ 1,068. In the evening is when there is more demand to fly to London Heathrow Airport, so prices are often more expensive at around C$ 1,139 per ticket.

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

You are more likely to see cheaper flights to London Heathrow Airport from Montreal when booking weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around C$ 984 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London Heathrow Airport from Montreal for as low as C$ 912 on momondo.

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

You could potentially save up to 26% on your flight if you consider stops on a Montreal to London Heathrow Airport flight.

TAP AIR PORTUGAL is the most popular carrier operating from Montreal to London Heathrow

Air Canada, British Airways and Lufthansa are the top three most popular airlines that fly to London Heathrow Airport from Montreal according to our data. Air Canada is the first choice among our users, with 54% of people opting to fly with this airline when travelling to London Heathrow Airport. Keep in mind that there are 9 different airlines that fly to London Heathrow Airport on a routine basis, so you have a few additional options to choose from.

Historically, on average around 23% of flights between Montreal and London have experienced a delay on any given week. The average delay length over the past 12 months has been 157 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.

Wednesday 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 23% of their flights experiencing any sort of delay.

Lisbon (LIS) was the most common stop: 75% of momondo users choosing one-stop flights on this route connected there.

Flights via Lisbon (LIS) offer the lowest average round-trip price of C$ 1,609.

Flights connecting via Paris (CDG) have the shortest average one-way travel time: 10h 00m.

Paris (CDG) has the shortest average layover time for this route: 1h 50m.

As of March 2026, there are 10 flights per day flying from Montreal to London Heathrow Airport. The most common time of day flights depart is 7:00p.m., with 100% of flights taking off in the evening.

As of March 2026, 71 flights take off from Montreal and land in London Heathrow Airport each week. The most common flight departure day for this route is Mon, with 17% of weekly flights taking off on this day.