Cheap flights from Montreal Pierre Elliott Trudeau Intl Airport to London from $323

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 $627. If you’re not able to fly to London Heathrow Airport in November, then October is your next best option. Flight prices from Montreal Pierre Elliott Trudeau Intl Airport to London Heathrow Airport during October average around $659.

Our data shows that Sunday is the least expensive day to fly to London Heathrow Airport. Tickets to fly out on this day can be as low as $821. The most expensive day to fly to London Heathrow Airport is Thursday, with ticket prices averaging around $923.

According to our data, the cheapest time of day to fly to London Heathrow Airport is in the afternoon. momondo users have found flights departing from Montreal Pierre Elliott Trudeau Intl Airport to London Heathrow Airport in the afternoon for as low as $784. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights in the evening are often more expensive with an average ticket price of $887.

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 $729 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 $670 on momondo.

There are 3 cabin classes available to choose from on Montreal Pierre Elliott Trudeau Intl 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 55% on your flight if you consider stops on a Montreal Pierre Elliott Trudeau Intl Airport to London Heathrow Airport flight.

As of April 2026, prices for Montreal Pierre Elliott Trudeau Intl Airport to London Heathrow Airport flights are approximately 23% cheaper when compared to flights at the same time last year.

TAP AIR PORTUGAL, Royal Air Maroc, 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 48% of people opting to fly with this airline when traveling to London Heathrow Airport. Keep in mind that there are 5 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 22% 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 151 minutes.

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

Wednesday is statistically the day of the week which experiences the fewest number of delays on this flight route. Friday has historically seen more delays on average compared to the rest of the week.

According to our data, Air Canada have had the least number of delays on this route over the last 12 months; with about 21% of their flights experiencing any sort of delay.

15 flights are operational daily from Montreal Pierre Elliott Trudeau Intl Airport to London Heathrow Airport as of April 2026. The most popular departure time for this route is 10:00PM, with 100% of flights per day taking off in the evening.

As of April 2026, 108 flights take off from Montreal Pierre Elliott Trudeau Intl Airport and land in London Heathrow Airport each week. The most common flight departure day for this route is Wed, with 17% of weekly flights taking off on this day.