LHR to YYZ flight delays
2,992 flights · March 2025 – August 2026 · UK Civil Aviation Authority
74.91%
Arrived on time
Within 15 minutes of schedule
2.07%
Cancelled
Share of scheduled flights
—
When late, late by
Average across delayed arrivals
13 min
Delay per flight
Averaged over every flight flown
What the record says about this route
Which airline you fly changes the odds here. Air Canada arrived on time 16.2 points more often than British Airways over the same period on the same route — same airports, same weather, same air traffic control. A gap that survives all of that is about how the two airlines are run.
The season swings this route hard. In April it ran 23.1 points more punctual than in August — a difference bigger than the one between the best and worst airlines on most routes. If the date is flexible, it is worth more than the carrier.
Flights from London to Toronto run late more often than the average route, though not severely.
Which airline should you fly on this route?
Over March 2025 – August 2026, Air Canada arrived on time most often on LHR to YYZ. British Airways was late most often. Flights ran closest to schedule in April and worst in August.
Every airline on LHR to YYZ
Ranked by how many flights each one operated. A carrier with fewer than 100 flights in the period is listed but not graded.
| Airline | Flights | On time | Cancelled | Avg delay | Grade |
|---|---|---|---|---|---|
| Air Canada | 1,658 | 81.02% | 3.08% | — | C |
| British Airways | 951 | 64.83% | 0.74% | — | D |
| Virgin Atlantic | 381 | 74.27% | 1.05% | — | C |
| Qatar Airways | 1 | 100% | 0% | — | — |
| Biman Bangladesh Airlines | 1 | 0% | 0% | — | — |
Month by month
Share of flights that arrived within 15 minutes of schedule, by month flown.
The return leg
YYZ to LHR Toronto back to London 72.32% on time DOther routes from London
Common questions
Are flights from London to Toronto usually delayed?
74.91% of flights on the LHR to YYZ route arrived within 15 minutes of schedule, so roughly 3 in every ten arrived late. That is about the same as the average route in this record.
Which airline is most on time from London to Toronto?
Air Canada, at 81.02% on time across 1,658 flights. The least punctual on the route was British Airways at 64.83%.
How often are LHR to YYZ flights cancelled?
2.07% of scheduled flights did not operate — about 21 in every thousand. That is in the normal range.
What is the best month to fly London to Toronto?
April, when 86.2% of flights arrived on time. The worst was August at 63.1%.
What these figures do and do not tell you
Everything on this page is counted from the flights that actually operated on LHR to YYZ during March 2025 – August 2026, as reported by the airlines to the US Bureau of Transportation Statistics. "On time" is the federal definition: arriving at the gate within 15 minutes of the scheduled time.
A route's record is a description of the past, not a forecast. Weather, air traffic control and the aircraft's earlier flights that day drive most delays, and none of them are predictable from a historical rate. What the record does tell you is whether this route runs late more often than others, and which carrier on it has the better history — which is the part you can actually act on when you book.
Cancellations are counted separately from delays because they are a different problem for a traveller: a late flight still gets you there. How the grade is calculated →