Air Canada's Signature Class features lie-flat seats and exclusive lounge access.
Air Canada offers complimentary meals for all fare classes on international flights.

Most accurate provider | Justfly.com 3 stars |
|---|---|
Most trusted provider | Justfly.com 3 stars |
Round-trip from | $597 (Air Canada) |
One-way from | $295 (Mytrip) |
Popular in | December |
Cheapest in | November |
Average price | $914 |
Good round-trip deal | $648 or less |
Good one-way deal | $571 or less |
Fly from
Fly to
Route
Depart
Return
Price
MontrealLondon
YUL - LHR
YULLHR
Montreal Pierre Elliott Trudeau Intl
Wed 1/14
7:30 pm-7:10 am
Nonstop6h 40m
London Heathrow
Sun 1/25
7:40 am-6:20 pm
1 stop15h 40m
MontrealLondon
YUL - LHR
YULLHR
Montreal Pierre Elliott Trudeau Intl
Mon 2/16
7:10 pm-7:10 am
Nonstop7h 00m
London Heathrow
Mon 2/23
11:10 am-6:20 pm
1 stop12h 10m
MontrealLondon
YUL - LHR
YULLHR
Montreal Pierre Elliott Trudeau Intl
Sun 2/15
7:10 pm-7:10 am
Nonstop7h 00m
London Heathrow
Mon 2/23
11:10 am-6:20 pm
1 stop12h 10m
MontrealLondon
YUL - LHR
YULLHR
Montreal Pierre Elliott Trudeau Intl
Sat 2/14
12:52 pm-9:05 am
1 stop15h 13m
London Heathrow
Mon 2/23
6:30 am-5:20 pm
1 stop15h 50m
MontrealLondon
YUL - LHR
YULLHR
Montreal Pierre Elliott Trudeau Intl
Sat 2/14
9:34 am-7:50 am
2 stops17h 16m
London Heathrow
Tue 2/24
6:20 am-12:15 pm
1 stop10h 55m
MontrealLondon
YUL - LHR
YULLHR
Montreal Pierre Elliott Trudeau Intl
Mon 1/12
7:30 pm-7:10 am
Nonstop6h 40m
London Heathrow
Sun 2/8
1:25 pm-4:05 pm
Nonstop7h 40m
MontrealLondon
YUL - LHR
YULLHR
Montreal Pierre Elliott Trudeau Intl
Wed 1/21
7:10 pm-7:10 am
Nonstop7h 00m
London Heathrow
Wed 1/28
1:25 pm-4:05 pm
Nonstop7h 40m
MontrealLondon
YUL - LHR
YULLHR
Montreal Pierre Elliott Trudeau Intl
Sat 2/14
7:10 pm-7:10 am
Nonstop7h 00m
London Heathrow
Sun 2/22
1:25 pm-4:05 pm
Nonstop7h 40m
MontrealLondon
YUL - LHR
YULLHR
Montreal Pierre Elliott Trudeau Intl
Fri 2/13
7:05 pm-10:30 am
1 stop10h 25m
London Heathrow
Mon 2/16
11:45 am-5:20 pm
1 stop10h 35m
MontrealLondon
YUL - LHR
YULLHR
Montreal Pierre Elliott Trudeau Intl
Fri 1/30
8:30 pm-8:20 am
Nonstop6h 50m
London Heathrow
Sun 2/8
4:10 pm-6:45 pm
Nonstop7h 35m
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy3 stars | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*2 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
Booking 66 days in advance of your planned departure date is, on average, the best time to get cheap flights from Montreal Pierre Elliott Trudeau Intl Airport to London Heathrow Airport. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
Currently, November is the cheapest month in which you can book a flight from Montreal Pierre Elliott Trudeau Intl Airport to London Heathrow Airport (average of $447). Flying from Montreal Pierre Elliott Trudeau Intl Airport to London Heathrow Airport in July is currently the most expensive (average of $720). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
It’s typically best to fly out from Montreal Pierre Elliott Trudeau Intl Airport to London Heathrow Airport at noon. Doing so could potentially save you 20% on the flight price compared to flying in the evening, which is usually more expensive.
About 21% of weekly flights between Montreal and London have experienced delays in the past year, with the average delay time being 172 minutes.
Historically, flights departing in the morning are less likely to be delayed, whereas flights leaving in the evening tend to experience delays more often.
Sunday tends to have the lowest number of delays on this route, whereas Saturday has historically faced a higher average of delays compared to other days of the week.
Over the last year, British Airways have had the lowest number of delays on this route, with just 21% of flights being delayed.
Lisbon (LIS) – chosen by Cheapflights users on 50% of 1-stop itineraries from Montreal Pierre Elliott Trudeau Intl Airport to London Heathrow Airport on Cheapflights.
Zurich (ZRH) is the most affordable 1-stop option, with an average round-trip price of $762.
Flights via Paris (CDG) have the shortest average one-way travel time for 1-stop routes: 10h 00m.
Flights via Zurich (ZRH) offer the fastest connection on this route, with an average layover time of 0h 55m.
Comfort
Boarding
Food
Crew
Entertainment
Overall
Reviews
Cameron,Nov 2025
PDX - LHR
Comfort
Boarding
Food
Crew
Entertainment
Overall
Reviews
Cameron,Nov 2025
PDX - LHR
Comfort
Boarding
Food
Crew
Entertainment
Overall
Reviews
Cameron,Nov 2025
PDX - LHR
Comfort
Boarding
Food
Crew
Entertainment
Overall
Reviews
Cameron,Nov 2025
PDX - LHR
Comfort
Boarding
Food
Crew
Entertainment
Overall
Reviews
Cameron,Nov 2025
PDX - LHR
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$543 | Average$724 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$549 | Average$765 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$582 | Average$790 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$587 | Average$780 | FlexibilityNo cancel fee | On-time70% |