Planes overhead in N21
Enfield, London. All 558 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 N21. Across its postcodes, January to August 2026:
- On a day it flies west (56% of days): up to 14 a day; of its 558 postcodes, 486 at 10 to 99, 72 under 10
- On a day it flies both ways (15% of days): up to 13 a day; of its 558 postcodes, 478 at 10 to 99, 80 under 10
- On a day it flies east (29% of days): up to 10 a day; of its 558 postcodes, 5 at 10 to 99, 553 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 |
|---|---|---|---|
| N21 1214 postcodes | 150 at 10 to 9964 under 10 | 180 at 10 to 9934 under 10 | 214 under 10 |
| N21 2168 postcodes | 160 at 10 to 998 under 10 | 126 at 10 to 9942 under 10 | 168 under 10 |
| N21 3157 postcodes | 157 at 10 to 99 | 153 at 10 to 994 under 10 | 5 at 10 to 99152 under 10 |
| N21 919 postcodes | 19 at 10 to 99 | 19 at 10 to 99 | 19 under 10 |
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.
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.