Airservices is Australia's air navigation service provider - we provide air traffic control, aviation rescue and fire fighting and air navigation services.

ATM network performance: Sydney

Airborne delay

The 75th percentile performance figures for airborne delay at Sydney are indicated in Figure 8. January performance for the median (1.5 minutes) and the 75th percentile (5.3 minutes) did not meet the targets (0.6 minutes and 3.3 minutes respectively). Compared to the same month last year, there was an increase in the airborne delay median performance (from 0.5 minutes) and in the 75th percentile performance (from 3.7 minutes).

The long‑term (48-month) and 24-month trends for airborne delay at Sydney are upwards.

Sydney airborne delay

Figure 8: Sydney airborne delay 75th percentile (last 24 months)

Distinctive events

Table 1 describes the distinctive events during January in Sydney.

Day Event Category Delay
(minutes – 75th percentile)
Event Descriptions
(Contributing causes to increased delays)
4 January 4.0 Afternoon: Strong winds, turbulence and windshear with a runway change earlier than forecast. This lead to only 3 landings in an hour, with multiple missed approaches. Several curfew were dispensations granted, and an international flight diverted.
6 January Significant 7.9 Afternoon: Worse than forecast thunderstorm conditions with multiple weather diversions. A temporary runway change occurred. Concentration of demand due to flights returning to Sydney, off-schedule internationals and non-compliant flights. Level 2 revision run at 1700 local.
16 January Significant 14.5 Morning: Thunderstorm arriving earlier than forecast.

Afternoon: Thunderstorms and turbulence affecting the terminal area. Concentration of demand due to off-schedule internationals and non-compliant flights. Level 1 revision run at 1450 local.

17 January Significant 14.6 Morning: Showers and poor weather conditions lead to two missed approaches and multiple weather diversions. Concentration of demand due to off-schedule internationals and non-compliant flights.

Afternoon: Concentration of demand due to off-schedule internationals and non-compliant flights.

20 January Significant 13.7 Afternoon: Thunderstorms leading to weather diversions. Concentration of demand due to non-compliant flights.
24 January Significant 21.2 Morning: Thunderstorms with weather diversions. Concentration of demand due to off-schedule internationals and non-compliant flights. A ground stop followed by Level 2 revision at 0925 local.

Afternoon: Cloud lower than forecast. Concentration of demand due to off-schedule internationals and non-compliant flights

27 January Notable 6.1 Afternoon: Strong winds and low cloud with a go-around. Concentration of demand due to off-schedule internationals and non-compliant flights.
28 January Significant 12.0 Morning: Concentration of demand due to off-schedule internationals and non-compliant flights.

Afternoon: Thunderstorm impacting arrivals from the north causing some weather diversions. Concentration of demand due to off-schedule internationals and non-compliant flights.

Table 1: Distinctive event descriptions for Sydney.