Cheap flights from London Heathrow Airport to Montreal from £310

The month of September is, on average, the cheapest month to fly to Montreal from London Heathrow Airport, with most prices found around £244. The month of May is another great option to travel to Montreal, with average flight prices from London Heathrow Airport averaging around £254.

The cheapest day to depart from London Heathrow Airport to Montreal is on a Friday. Travellers who choose to depart for Montreal on a Friday will often find tickets for as low as £544. Flights from London Heathrow Airport to Montreal on a Saturday will generally be more expensive and average around £578. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

In the afternoon is the cheapest time of day to fly from London Heathrow Airport to Montreal when you can find flight prices for as low as £526. Flying to Montreal in the afternoon is an ideal time because this is during off-peak travel hours. In contrast, the most expensive time of day to depart to Montreal is at midday when prices are around £588.

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

You are more likely to see cheaper flights to Montreal from London Heathrow Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Montreal for around £505 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Montreal from London Heathrow Airport for as low as £478 on momondo.

You could potentially save up to 37% on your flight if you consider stops on a London Heathrow Airport to Montreal flight.

As of April 2026, prices for London Heathrow Airport to Montreal flights are approximately 47% more expensive when compared to flights at the same time last year.

KLM and Finnair are the most popular carriers operating from London Heathrow to Montreal

Air Canada, British Airways and Lufthansa are the top three most popular airlines that fly to Montreal from London Heathrow Airport according to our data. Air Canada is the first choice among our users, with 71% of people opting to fly with this airline when travelling to Montreal. Keep in mind that there are 6 different airlines that fly to Montreal on a routine basis, so you have a few additional options to choose from.

Historically, on average around 9% 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 153 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.

Saturday is statistically the day of the week that experiences the fewest 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 fewest delays on this route over the last 12 months, with about 7% of their flights experiencing any sort of delay.

Zurich (ZRH) was the most common stop: 25% of momondo users choosing one-stop flights on this route connected there.

Flights via Frankfurt am Main (FRA) offer the lowest average return price of £364.

Flights connecting via Frankfurt am Main (FRA) have the shortest average one-way travel time: 10h 30m.

Vienna (VIE) has the shortest average stopover time for this route: 1h 35m.

The number of flights available between London Heathrow Airport and Montreal is 15 per day as of April 2026. The most frequent departure time is 14:00, with 49% of daily flights leaving in the afternoon.

105 flights are operational weekly from London Heathrow Airport to Montreal as of April 2026. The most popular departure day for this route is Tue, with 20% of flights per week taking off on this day.