Cheap flights from London to Montreal from £227

The month of September is, on average, the cheapest month to fly to Montreal from London, with most prices found around £447. The month of January is another great option to travel to Montreal, with average flight prices from London averaging around £464.

The cheapest day to depart from London to Montreal is on a Friday. Travellers who choose to depart for Montreal on a Friday will often find tickets for as low as £586. Flights from London to Montreal on a Tuesday will generally be more expensive and average around £611. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

In the morning is the cheapest time of day to fly from London to Montreal when you can find flight prices for as low as £575. Flying to Montreal in the morning 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 £625.

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

You are more likely to see cheaper flights to Montreal from London when booking weeks ahead of your departure date. In general, you can expect to find flights to Montreal for around £552 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 for as low as £532 on momondo.

There are 4 cabin classes available to choose from on London 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 60% on your flight if you consider stops on a London to Montreal flight.

As of October 2026, prices for London to Montreal flights are approximately 71% cheaper when compared to flights at the same time last year.

British Airways and Delta are the most popular carriers operating from London to Montreal

Air Canada, Lufthansa and Air Transat are the top three most popular airlines that fly to Montreal from London according to our data. Air Canada is the first choice among our users, with 67% of people opting to fly with this airline when travelling to Montreal. Keep in mind that there are 7 different airlines that fly to Montreal on a routine basis, so you have a few additional options to choose from.

Historically, on average around 12% 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 156 minutes.

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

Sunday is statistically the day of the week that experiences the fewest delays on this flight route. Thursday 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.

Toronto (YYZ) was the most common stop: 33% of momondo users choosing one-stop flights on this route connected there.

Flights via Amsterdam (AMS) offer the lowest average return price of £311.

Flights connecting via Halifax (YHZ) have the shortest average one-way travel time: 10h 38m.

Zurich (ZRH) has the shortest average stopover time for this route: 0h 50m.

The number of flights available between London and Montreal is 6 per day as of October 2026. The most frequent departure time is 14:00, with 44% of daily flights leaving in the afternoon.

The number of flights available between London and Montreal is 44 per week as of October 2026. The most frequent departure day is Wed, with 27% of weekly flights leaving on this day.