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(KL) KLM 8521 On-Time Performance Rating

Date Range:

15-Aug-2026 to 15-Oct-2026

(LYR) Longyearbyen Svalbard Airport

Longyearbyen, SJ

(TOS) Tromso Langnes Airport

Tromso, NO

On-Time Performance Chart

(using rounded numbers)
On-Time
4
50%
Late
1
13%
Very Late
1
13%
Excessive
1
13%
Cancelled
0
0%
Diverted
1
13%

Delay Statistics

(Aggregate Arrival Delay Statistics for this Flight)

Total Flights Observed
7
Total Delays ( > 1 min )
6
Codeshares
7
Average Delay (min.)
52
Standard Deviation
92.6
Min
0
Max
239

KL 8521 On-Time Performance Details

Overall Rating
0.7 of 5
Poor
Percentage On-Time 57%
Average Delay Time 52 min
FlightStats Rating is a merit measurement considering both on-time performance and delay severity. The score, 0.7 shows that this flight has on-time performance characteristics better than 13% of all other flights in the FlightStats database.
On-Time Performance Rating
0.5 of 5
Very Poor
Percentage On-Time 57%
This flight has an on-time performance of 57%. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight is on-time more often than 10% of other flights.
Delay Performance
0.9 of 5
Poor
Average Delay Time 52 min
This flight has an average delay of 52 minutes with a standard deviation of 92.6 minutes. Statistically, when taking into consideration sample size, standard deviation, and mean, this flight has delay performance characteristics better than 18% of other flights.

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