background

(KL) KLM 4239 On-Time Performance Rating

Date Range:

01-Aug-2026 to 30-Sep-2026

(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
32
62%
Late
4
8%
Very Late
3
6%
Excessive
7
13%
Cancelled
6
12%
Diverted
0
0%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
52
Total Delays ( > 1 min )
23
Codeshares
52
Average Delay (min.)
48.95652173913044
Standard Deviation
67.9
Min
0
Max
293

KL 4239 On-Time Performance Details

Overall Rating
0.3 of 5
Very Poor
Percentage On-Time 62%
Average Delay Time 48.95652173913044 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 0.3 shows that this flight has on-time performance characteristics better than 5% of all other flights in the FlightStats database.
On-Time Performance Rating
0.1 of 5
Very Poor
Percentage On-Time 62%
This flight has an on-time performance of 62%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 1% of other flights.
Delay Performance
0.5 of 5
Very Poor
Average Delay Time 48.95652173913044 min
This flight has an average delay of 48.95652173913044 minutes with a standard deviation of 67.9 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 10% of other flights.