Planes overhead in HA3
Harrow and Brent, London. All 1,262 of its postcodes measured, January to August 2026.
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 HA3. Across its postcodes, January to August 2026:
- On a day it flies west (56% of days): up to 15 a day; of its 1,262 postcodes, 294 at 10 to 99, 968 under 10
- On a day it flies both ways (15% of days): up to 21 a day; of its 1,262 postcodes, 1,193 at 10 to 99, 69 under 10
- On a day it flies east (29% of days): up to 27 a day; of its 1,262 postcodes, 1,033 at 10 to 99, 229 under 10
The table counts the postcodes of each sector by how many planes pass over them a day: 100 or more, 10 to 99, or under 10.
| Sector | Flying west56% of days | Both ways15% of days | Flying east29% of days |
|---|---|---|---|
| HA3 0215 postcodes | 66 at 10 to 99149 under 10 | 196 at 10 to 9919 under 10 | 213 at 10 to 992 under 10 |
| HA3 323 postcodes | 23 under 10 | 23 under 10 | 23 under 10 |
| HA3 5171 postcodes | 171 under 10 | 168 at 10 to 993 under 10 | 53 at 10 to 99118 under 10 |
| HA3 6212 postcodes | 212 under 10 | 212 at 10 to 99 | 173 at 10 to 9939 under 10 |
| HA3 7221 postcodes | 221 under 10 | 221 at 10 to 99 | 182 at 10 to 9939 under 10 |
| HA3 8204 postcodes | 19 at 10 to 99185 under 10 | 182 at 10 to 9922 under 10 | 198 at 10 to 996 under 10 |
| HA3 9216 postcodes | 209 at 10 to 997 under 10 | 214 at 10 to 992 under 10 | 214 at 10 to 992 under 10 |
1 of its postcodes have a position ONS estimates, so their figures may be for a spot a few hundred metres away.
Over 3 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.
Near HA3
HA1 HA7 HA2 HA8 HA9 HA5 NW9 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.