Planes overhead in BS21
North Somerset, Bristol. All 679 of its postcodes measured (16 PO boxes and other large-user postcodes left out), January to August 2026.
From Bristol
Planes land and take off into the wind, so the weather decides which way Bristol flies, and that decides how many pass over BS21. Across its postcodes, January to August 2026:
On a day it flies west, 54% of days
Up to 60
a day
Of its 679 postcodes:
- 10 to 99
- 6
- under 10
- 673
On a day it flies both ways, 21% of days
Up to 33
a day
Of its 679 postcodes:
- 10 to 99
- 30
- under 10
- 649
On a day it flies east, 25% of days
Up to 14
a day
Of its 679 postcodes:
- 10 to 99
- 107
- under 10
- 572
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 west54% of days | Both ways21% of days | Flying east25% of days |
|---|---|---|---|
| BS21 598 postcodes | 98 under 10 | 98 under 10 | 98 under 10 |
| BS21 6304 postcodes | 5 at 10 to 99 | 2 at 10 to 99 | 6 at 10 to 99 |
| BS21 7277 postcodes | 1 at 10 to 99 | 28 at 10 to 99 | 101 at 10 to 99 |
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 BS21
BS49 BS20 BS22 BS29 BS24 BS23 BS41 BS11
The councils
Where these figures come from
Counted from community flight tracking, checked against the CAA's monthly totals for Bristol. 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.