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ATM network performance: Perth

Airborne delay

The 75th percentile performance figures for airborne delay at Perth are indicated in Figure 11.  May performance for the median (-0.1 minutes) and the 75th percentile (2.3 minutes) met the targets. Compared to the same month last year, there was an increase in the airborne delay median performance (from -0.3 minutes) and 75th percentile performance (from 1.6 minutes).

The long-term (48‑month) trend for airborne delay at Perth is downwards.


Figure 11: Perth airborne delay 75th percentile (last 24 months)

Notable events

Table 8 describes the notable airborne delay events during May in Perth.

Day Local Time Delay

(minutes – 75th percentile)

Event Descriptions

(Contributing causes to increased delays)

23 May 10-11 6.0 Concentration of demand due to late non‑compliant flights and longer than anticipated flight times.

Table 8: Notable event descriptions for Perth.