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(UL) SriLankan Airlines 504 On-Time Performance Rating

Date Range:

15-Jul-2025 to 15-Sep-2025

(LHR) London Heathrow Airport

London, EN, GB

(CMB) Colombo Bandaranaike International Airport

Colombo, LK

On-Time Performance Chart

(using rounded numbers)
On-Time
33
54%
Late
17
28%
Very Late
5
8%
Excessive
5
8%
Cancelled
0
0%
Diverted
1
2%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
60
Total Delays ( > 1 min )
49
Codeshares
0
Average Delay (min.)
20.79591836734694
Standard Deviation
17.4
Min
0
Max
71

UL 504 On-Time Performance Details

Overall Rating
2.4 of 5
Average
Percentage On-Time 55%
Average Delay Time 20.79591836734694 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 2.4 shows that this flight has on-time performance characteristics better than 46% of all other flights in the FlightStats database.
On-Time Performance Rating
0.0 of 5
Very Poor
Percentage On-Time 55%
This flight has an on-time performance of 55%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 0% of other flights.
Delay Performance
4.7 of 5
Very Good
Average Delay Time 20.79591836734694 min
This flight has an average delay of 20.79591836734694 minutes with a standard deviation of 17.4 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 95% of other flights.