Planes overhead in HA4
Hillingdon and Harrow, London. All 1,093 of its postcodes measured (44 PO boxes and other large-user postcodes left out), January to August 2026.
For Heathrow's expansion consultation, open until 22 December 2026: the planes over Hillingdon, council by council.
From Heathrow
Planes land and take off into the wind, so the weather decides which way Heathrow flies, and that decides how many pass over HA4. Across its postcodes, January to August 2026:
On a day it flies west, 56% of days
Up to 2
a day
Of its 1,093 postcodes:
- under 10
- 1,093
On a day it flies both ways, 15% of days
Up to 14
a day
Of its 1,093 postcodes:
- 10 to 99
- 28
- under 10
- 1,065
On a day it flies east, 29% of days
Up to 14
a day
Of its 1,093 postcodes:
- 10 to 99
- 22
- under 10
- 1,071
Each sector's bar splits its postcodes by how many planes pass over them a day; the figure above it counts those in the busiest band the sector reaches. The list above gives the whole district's counts.
| Sector | Flying west56% of days | Both ways15% of days | Flying east29% of days |
|---|---|---|---|
| HA4 0210 postcodes | 210 under 10 | 210 under 10 | 210 under 10 |
| HA4 6221 postcodes | 221 under 10 | 221 under 10 | 221 under 10 |
| HA4 7247 postcodes | 247 under 10 | 28 at 10 to 99 | 22 at 10 to 99 |
| HA4 8215 postcodes | 215 under 10 | 215 under 10 | 215 under 10 |
| HA4 9200 postcodes | 200 under 10 | 200 under 10 | 200 under 10 |
Over 33 of its postcodes, other flying passes too, from airfields, helicopters and airports we cannot check against official counts, so few planes from the airports we count does not mean a quiet sky there.
What counts as overhead
Overhead means more than halfway up the sky (48.5 degrees or more) and below 7,000 ft, the CAA's definition of an overflight (CAP 1498). A day counts as one way when 80% of its flights used that way. PO boxes and other postcodes for organisations that receive a lot of post are left out: they sit at a delivery office or a business, not at homes.
Near HA4
HA5 HA2 HA6 HA1 UB6 UB1 HA3 HA0
The councils
Where these figures come from
Counted from community flight tracking, checked against the CAA's monthly totals for Heathrow. Flight tracks: adsb.lol (ODbL 1.0); Weather at each airport: Iowa Environmental Mesonet; Ground heights: Contains OS data © Crown copyright and database right; Postcode positions: ONS National Statistics Postcode Lookup (OGL). Licence: Open Database License (ODbL) 1.0.