Planes overhead in BL4
Bolton, Greater Manchester. All 821 of its postcodes measured (29 PO boxes and other large-user postcodes left out), January to August 2026.
From Manchester
Planes land and take off into the wind, so the weather decides which way Manchester flies, and that decides how many pass over BL4. Across its postcodes, January to August 2026:
On a day it flies west, 70% of days
Up to 43
a day
Of its 821 postcodes:
- 10 to 99
- 786
- under 10
- 35
On a day it flies both ways, 10% of days
Up to 23
a day
Of its 821 postcodes:
- 10 to 99
- 663
- under 10
- 158
On a day it flies east, 20% of days
Up to 4
a day
Of its 821 postcodes:
- under 10
- 821
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 west70% of days | Both ways10% of days | Flying east20% of days |
|---|---|---|---|
| BL4 0197 postcodes | 197 at 10 to 99 | 197 at 10 to 99 | 197 under 10 |
| BL4 7207 postcodes | 207 at 10 to 99 | 207 at 10 to 99 | 207 under 10 |
| BL4 8199 postcodes | 164 at 10 to 99 | 76 at 10 to 99 | 199 under 10 |
| BL4 9218 postcodes | 218 at 10 to 99 | 183 at 10 to 99 | 218 under 10 |
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 BL4
M38 BL3 M28 BL2 M26 M29 BL1 M46
The councils
Where these figures come from
Counted from community flight tracking, checked against the CAA's monthly totals for Manchester. 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.