Cheap flights from Montreal to London from £254

The cheapest month to fly to London from Montreal is in September. Flight prices, which tend to average around £431, are often lower during this time because this is during the off-season. The month of October is another great option to travel to London, with average flight prices from Montreal averaging around £440.

Our data shows that Sunday is the least expensive day to fly to London. Tickets to fly out on this day can be as low as £453. When flying out on a Saturday, the most expensive travel day of the week, you can expect to see flight prices from Montreal to London for around £620.

The cheapest time of day to fly to London is in the afternoon when flights can be purchased for as low as £504. Flights in the evening are often more expensive, with an average ticket price of £558.

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

You are more likely to see cheaper flights to London from Montreal when booking weeks ahead of your departure date. In general, you can expect to find flights to London for around £541 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London from Montreal for as low as £500 on momondo.

There are 3 cabin classes available to choose from on Montreal to London 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 15% on your flight if you consider stops on a Montreal to London flight.

As of April 2026, prices for Montreal to London flights are approximately 22% more expensive when compared to flights at the same time last year.

Historically, on average around 19% 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 149 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.

Thursday is statistically the day of the week that experiences the fewest 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 Transat have had the fewest delays on this route over the last 12 months, with about 10% of their flights experiencing any sort of delay.

Toronto (YYZ) was the most common stop: 43% of momondo users choosing one-stop flights on this route connected there.

Flights via Halifax (YHZ) offer the lowest average return price of £541.

Flights connecting via Amsterdam (AMS) have the shortest average one-way travel time: 9h 00m.

Munich (MUC) has the shortest average stopover time for this route: 1h 55m.

The number of flights available between Montreal and London is 14 per day as of April 2026. The most frequent departure time is 22:00, with 100% of daily flights leaving in the evening.

As of April 2026, 100 flights take off from Montreal and land in London each week. The most common flight departure day for this route is Wed, with 18% of weekly flights taking off on this day.