Cheap flights from Montreal to London from C$ 335

In general, September is the cheapest month to fly from Montreal to London. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around C$ 811. If you aren’t able to travel to London during the month of September, then flying in May is also cheap. Prices for this month can be found on momondo for an average of C$ 828.

According to our data, Sunday is the cheapest day to fly to London from Montreal. The lowest ticket price found for a Sunday departure recently was C$ 1,066. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. When flying out on a Friday, the most expensive travel day of the week, you can expect to see flight prices from Montreal to London for around C$ 1,143.

Our most recent data shows that the best time of day to fly to London is in the evening. Flights from Montreal to London during this time can be as low as C$ 1,115. In the afternoon is when there is more demand to fly to London, so prices are often more expensive at around C$ 1,118 per ticket.

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 C$ 1,018 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London from Montreal for as low as C$ 940 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 3% 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.

TAP AIR PORTUGAL, Royal Air Maroc, and KLM are the most popular carriers operating from Montreal to London

Air Canada, British Airways and Lufthansa are the top three most popular airlines that fly to London from Montreal according to our data. Air Canada is the first choice among our users, with 50% of people opting to fly with this airline when travelling to London. Keep in mind that there are 8 different airlines that fly to London on a routine basis, so you have a few additional options to choose from.

Historically, on average around 20% 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 147 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 has had the least delays on this route over the last 12 months, with about 11% of their flights experiencing any sort of delay.

Toronto (YYZ) was the most common stop: 76% of momondo users choosing one-stop flights on this route connected there.

Flights via Lisbon (LIS) offer the lowest average round-trip price of C$ 601.

Flights connecting via Amsterdam (AMS) have the shortest average one-way travel time: 9h 40m.

Amsterdam (AMS) has the shortest average layover time for this route: 1h 33m.

As of April 2026, 16 flights take off from Montreal and land in London each day. The most common flight departure time for this route is 10:00p.m., with 100% of daily flights taking off in the evening.

As of April 2026, there are 112 flights per week flying from Montreal to London. The most common day of the week flights depart is Tue, with 16% of flights taking off on this day.