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(KL) KLM 4239 On-Time Performance Rating

Date Range:

01-Sep-2025 to 31-Oct-2025

(DAR) Dar es Salaam Julius Nyerere International Airport

Dar Es Salaam, TZ

(NBO) Nairobi Jomo Kenyatta International Airport

Nairobi, KE

On-Time Performance Chart

(using rounded numbers)
On-Time
42
74%
Late
1
2%
Very Late
3
5%
Excessive
3
5%
Cancelled
7
12%
Diverted
1
2%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
57
Total Delays ( > 1 min )
12
Codeshares
57
Average Delay (min.)
47.416666666666664
Standard Deviation
69.9
Min
0
Max
260

KL 4239 On-Time Performance Details

Overall Rating
0.9 of 5
Poor
Percentage On-Time 74%
Average Delay Time 47.416666666666664 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 0.9 shows that this flight has on-time performance characteristics better than 16% of all other flights in the FlightStats database.
On-Time Performance Rating
1.2 of 5
Poor
Percentage On-Time 74%
This flight has an on-time performance of 74%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 24% of other flights.
Delay Performance
0.5 of 5
Very Poor
Average Delay Time 47.416666666666664 min
This flight has an average delay of 47.416666666666664 minutes with a standard deviation of 69.9 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 10% of other flights.