Planes overhead in N21
Enfield, London. All 531 of its postcodes measured (27 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 Enfield, 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 N21. Across its postcodes, January to August 2026:
On a day it flies west, 56% of days
Up to 14
a day
Of its 531 postcodes:
- 10 to 99
- 459
- under 10
- 72
On a day it flies both ways, 15% of days
Up to 13
a day
Of its 531 postcodes:
- 10 to 99
- 451
- under 10
- 80
On a day it flies east, 29% of days
Up to 10
a day
Of its 531 postcodes:
- 10 to 99
- 5
- under 10
- 526
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 |
|---|---|---|---|
| N21 1210 postcodes | 146 at 10 to 99 | 176 at 10 to 99 | 210 under 10 |
| N21 2168 postcodes | 160 at 10 to 99 | 126 at 10 to 99 | 168 under 10 |
| N21 3153 postcodes | 153 at 10 to 99 | 149 at 10 to 99 | 5 at 10 to 99 |
Also counted here: Stansted, at most 4 a day over any of its postcodes.
1 of its postcodes have a position ONS estimates, so their figures may be for a spot a few hundred metres away.
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 N21
N13 N14 EN2 EN1 N9 N18 N11 N22
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.