Cheap flights from Montreal Pierre Elliott Trudeau Intl Airport to London from $331

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 $619. 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 $655.

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 $823. The most expensive day to fly to London Heathrow Airport is Thursday, with ticket prices averaging around $901.

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 $884.

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 $747 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 $649 on momondo.

There are 3 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 39% on your flight if you consider stops on a Montreal Pierre Elliott Trudeau Intl Airport to London Heathrow Airport flight.

As of June 2026, prices for Montreal Pierre Elliott Trudeau Intl Airport to London Heathrow Airport flights are approximately 25% more expensive when compared to flights at the same time last year.

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 161 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.

Saturday is statistically the day of the week which experiences the fewest number of 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 have had the least number of delays on this route over the last 12 months; with about 20% of their flights experiencing any sort of delay.

14 flights are operational daily from Montreal Pierre Elliott Trudeau Intl Airport to London Heathrow Airport as of June 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 June 2026, 104 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 Tue, with 17% of weekly flights taking off on this day.