Aircraft noise in Pennant Hills (2120)
On a typical day, about 24 aircraft pass over Pennant Hills — mostly arrivals at Sydney Kingsford Smith Airport, between roughly 3,000 and 5,000 ft. Helicopters and light aircraft add another 3 low overflights a day. Estimated peak ground noise reaches 78–81 dB — enough to interrupt conversation outdoors. It ranks #50 of 139 Sydney suburbs for aircraft noise exposure. (Flight Path Noise monitoring data, 90 days to 2026-08-21.)
Data: 90 days to 2026-08-21 · all tracked aircraft over Pennant Hills · updated monthly
Where the noise comes from
Pennant Hills hears traffic from 2 distinct sources:
Sydney Kingsford Smith Airport
live map →21 overflights/day (88%) · typically 3,100 ft
Pennant Hills lies under the north-western arrival flow, with descending traffic passing at moderate altitude toward the approach sequence. The stream is steady rather than sharp — most residents notice it as intermittent background rather than event noise.
Helicopters & other light aircraft
3 overflights/day (12%) · typically 2,600 ft
Around 3 low overflights a day come from aircraft not operating at a tracked airport — helicopters, seaplanes and light aircraft transiting the area. Light-aircraft counts are tracked overflights only — many training and private aircraft carry no ADS-B transponder, so true numbers are higher.
Light-aircraft counts are tracked overflights only — many training and private aircraft carry no ADS-B transponder, so true numbers are higher.
How nearby suburbs compare
| Suburb | Overflights / day | Rank |
|---|---|---|
| Pennant Hills | 24 | #50 |
| West Pennant Hills | 23 | #52 |
| South Turramurra | 19 | #71 |
| Beecroft | 14 | #89 |
| North Epping | 13 | #94 |
| Thornleigh | 13 | #99 |
| Cheltenham | 6 | #132 |
Common questions
- Is Pennant Hills under a flight path?
- Yes — Pennant Hills is under Sydney Kingsford Smith Airport flight paths, with around 24 overflights on a typical day, mostly arrivals.
- Which airport's aircraft fly over Pennant Hills?
- More than one source: Sydney Kingsford Smith Airport (~21/day), other low-flying aircraft (~3/day). The breakdown above shows each source's pattern.
- What time do planes start over Pennant Hills?
- The first movements typically pass over Pennant Hills around 9:34am, once the curfew (11 PM – 6 AM) ends. Traffic builds through the morning peak.
- Is it quieter in Pennant Hills on weekends?
- Slightly — weekends average about 14% fewer overflights than weekdays (28 vs 32 a day).
- Do planes fly over Pennant Hills at night?
- The main airport's curfew restricts movements between 11 PM – 6 AM, so overnight overflights are rare. The last movements are typically around 9:14pm.
Checking a specific address?
This page shows suburb-wide averages. An address report gives you the exact overflight count, altitudes, hourly pattern and noise estimate for one property. Leave your email and we'll let you know when reports are ready for Pennant Hills.
