Cheap flights from Montreal Pierre Elliott Trudeau Intl Airport to London from $343

The cheapest month to fly to London from Montreal Pierre Elliott Trudeau Intl Airport is in December. Flight prices, which tend to average around $344, are often lower during this time because this is during the off-season. The month of February is another great option to travel to London, with average flight prices from Montreal Pierre Elliott Trudeau Intl Airport averaging around $356.

The cheapest day to depart from Montreal Pierre Elliott Trudeau Intl Airport to London is on a Saturday. Travelers who choose to depart for London on a Saturday will often find tickets for as low as $806. If your travel schedule is flexible, try to avoid departing on a Thursday because tickets tend to average around $895. These prices are subject to change though, so be sure to set up a Price Alert for flights to London.

Flying to London from Montreal Pierre Elliott Trudeau Intl Airport in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $794 when looking at flights departing in the afternoon. Flights to London are more costly in the evening, with an average ticket price of $866. Departure times in the evening fall within the peak daily travel times, which is why tickets can be more expensive.

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

You are more likely to see cheaper flights to London from Montreal Pierre Elliott Trudeau Intl Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to London for around $744 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London from Montreal Pierre Elliott Trudeau Intl Airport for as low as $688 on momondo.

No. A direct flight is the cheapest option for a flight between Montreal Pierre Elliott Trudeau Intl Airport to London.

As of May 2026, prices for Montreal Pierre Elliott Trudeau Intl Airport to London flights are approximately 72% more expensive when compared to flights at the same time last year.

Air Transat is the most popular carrier operating from Montreal Pierre Elliott Trudeau Intl to London

Air Canada, British Airways and Lufthansa are the top three most popular airlines that fly to London from Montreal Pierre Elliott Trudeau Intl Airport according to our data. Air Canada is the first choice among our users, with 45% of people opting to fly with this airline when traveling to London. Keep in mind that there are 6 different airlines that fly to London on a routine basis, so you have a few additional options to choose from.

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 154 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.

Thursday is statistically the day of the week which experiences the fewest number of delays on this flight route. Tuesday has historically seen more delays on average compared to the rest of the week.

According to our data, Air Transat have had the least number of delays on this route over the last 12 months; with about 10% of their flights experiencing any sort of delay.

Munich (MUC) was the most common stop: 43% of momondo users choosing 1-stop flights on this route connected there.

Flights via Toronto (YYZ) offer the lowest average round-trip price of $729.

Flights connecting via Brussels (BRU) have the shortest average one-way travel time: 10h 05m.

Brussels (BRU) has the shortest average layover time for this route: 1h 25m.

14 flights are operational daily from Montreal Pierre Elliott Trudeau Intl Airport to London as of May 2026. The most popular departure time for this route is 10:00PM, with 100% of flights per day taking off in the evening.

As of May 2026, 104 flights take off from Montreal Pierre Elliott Trudeau Intl Airport and land in London each week. The most common flight departure day for this route is Tue, with 19% of weekly flights taking off on this day.