Cheap flights from Montreal Pierre Elliott Trudeau Intl Airport to London from C$ 439

The month of November is, on average, the cheapest month to fly to London Heathrow Airport from Montreal Pierre Elliott Trudeau Intl Airport, with most prices found around C$ 877. If you aren’t able to travel to London Heathrow Airport during the month of November, then flying in October is also cheap. Prices for this month can be found on momondo for an average of C$ 923.

According to our data, Sunday is the cheapest day to fly to London Heathrow Airport from Montreal Pierre Elliott Trudeau Intl Airport. The lowest ticket price found for a Sunday departure recently was C$ 1,117. 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 Tuesday, the most expensive travel day of the week, you can expect to see flight prices from Montreal Pierre Elliott Trudeau Intl Airport to London Heathrow Airport for around C$ 1,177.

Our data shows that the cheapest Montreal Pierre Elliott Trudeau Intl Airport 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$ 1,122. In the evening is when there is more demand to fly to London Heathrow Airport, so prices are often more expensive at around C$ 1,152 per ticket.

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

You are more likely to see cheaper flights to London Heathrow Airport from Montreal Pierre Elliott Trudeau Intl Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around C$ 1,051 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 Pierre Elliott Trudeau Intl Airport for as low as C$ 918 on momondo.

There are 4 cabin classes available to choose from on Montreal Pierre Elliott Trudeau Intl Airport to London Heathrow Airport 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 40% on your flight if you consider stops on a Montreal Pierre Elliott Trudeau Intl Airport to London Heathrow Airport flight.

As of July 2026, prices for Montreal Pierre Elliott Trudeau Intl Airport to London Heathrow Airport flights are approximately 5% more expensive when compared to flights at the same time last year.

TAP AIR PORTUGAL and British Airways are the most popular carriers operating from Montreal Pierre Elliott Trudeau Intl to London Heathrow

Air Canada, British Airways and Lufthansa are the top three most popular airlines that fly to London Heathrow Airport from Montreal Pierre Elliott Trudeau Intl Airport according to our data. Air Canada is the first choice among our users, with 53% of people opting to fly with this airline when travelling to London Heathrow Airport. Keep in mind that there are 6 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 160 minutes.

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

Saturday 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.

As of July 2026, 16 flights take off from Montreal Pierre Elliott Trudeau Intl Airport and land in London Heathrow Airport each day. The most common flight departure time for this route is 10:00p.m., with 100% of daily flights taking off in the evening.

The number of flights available between Montreal Pierre Elliott Trudeau Intl Airport and London Heathrow Airport is 114 per week as of July 2026. The most frequent departure day is Wed, with 19% of weekly flights leaving on this day.