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(AC) Air Canada 851 On-Time Performance Rating

Date Range:

01-Dec-2025 to 31-Jan-2026

(LHR) London Heathrow Airport

London, EN, GB

(YYC) Calgary International Airport

Calgary, AB, CA

On-Time Performance Chart

(using rounded numbers)
On-Time
48
79%
Late
7
11%
Very Late
3
5%
Excessive
1
2%
Cancelled
1
2%
Diverted
1
2%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
60
Total Delays ( > 1 min )
21
Codeshares
0
Average Delay (min.)
17.238095238095237
Standard Deviation
14
Min
0
Max
55

AC 851 On-Time Performance Details

Overall Rating
4.6 of 5
Very Good
Percentage On-Time 80%
Average Delay Time 17.238095238095237 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 4.6 shows that this flight has on-time performance characteristics better than 90% of all other flights in the FlightStats database.
On-Time Performance Rating
4.5 of 5
Good
Percentage On-Time 80%
This flight has an on-time performance of 80%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 90% of other flights.
Delay Performance
4.6 of 5
Very Good
Average Delay Time 17.238095238095237 min
This flight has an average delay of 17.238095238095237 minutes with a standard deviation of 14 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 92% of other flights.