Cheap flights from London Heathrow Airport to Montreal from $393

The cheapest month to fly to Montreal from London Heathrow Airport is in September. Flight prices, which tend to average around $329, are often lower during this time because this is during the off-season. If you are unable to visit Montreal during the month of September, then departing from London Heathrow Airport during the month March is also very affordable. Most momondo users find prices during this month for around $363.

The cheapest day to depart from London Heathrow Airport to Montreal is on a Thursday when prices can be found for as low as $712. Flights from London Heathrow Airport to Montreal on a Friday will generally be more expensive and average around $785. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

Our most recent data shows that the best time of day to fly to Montreal is in the afternoon. Flights from London Heathrow Airport to Montreal during this time can be as low as $725. At noon is when there is more demand to fly to Montreal, so prices are often more expensive at around $778 per ticket.

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 $710 when searching weeks out. 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 $663 on momondo.

There are 3 cabin classes available to choose from on London Heathrow Airport to Montreal 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 38% on your flight if you consider stops on a London Heathrow Airport to Montreal flight.

As of June 2026, prices for London Heathrow Airport to Montreal flights are approximately 10% cheaper when compared to flights at the same time last year.

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 155 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 6% of their flights experiencing any sort of delay.

9 flights are operational daily from London Heathrow Airport to Montreal as of June 2026. The most popular departure time for this route is 2:00PM, with 49% of flights per day taking off in the afternoon.

65 flights are operational weekly from London Heathrow Airport to Montreal as of June 2026. The most popular departure day for this route is Tue, with 26% of flights per week taking off on this day.