Planes overhead in L35
Knowsley and St Helens, Merseyside. 732 of its 733 postcodes measured, the ones in Knowsley and St Helens (10 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 L35. Across its postcodes, January to August 2026:
On a day it flies west, 70% of days
Up to 1
a day
Of its 732 postcodes:
- under 10
- 732
On a day it flies both ways, 10% of days
Up to 6
a day
Of its 732 postcodes:
- under 10
- 732
On a day it flies east, 20% of days
Up to 14
a day
Of its 732 postcodes:
- 10 to 99
- 192
- under 10
- 540
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 |
|---|---|---|---|
| L35 078 postcodes | 78 under 10 | 78 under 10 | 74 at 10 to 99 |
| L35 158 postcodes | 58 under 10 | 58 under 10 | 58 under 10 |
| L35 253 postcodes | 53 under 10 | 53 under 10 | 53 under 10 |
| L35 3177 postcodes | 177 under 10 | 177 under 10 | 177 under 10 |
| L35 475 postcodes | 75 under 10 | 75 under 10 | 67 at 10 to 99 |
| L35 591 postcodes | 91 under 10 | 91 under 10 | 91 under 10 |
| L35 643 postcodes | 43 under 10 | 43 under 10 | 42 at 10 to 99 |
| L35 763 postcodes | 63 under 10 | 63 under 10 | 63 under 10 |
| L35 860 postcodes | 60 under 10 | 60 under 10 | 7 at 10 to 99 |
| L35 934 postcodes | 34 under 10 | 34 under 10 | 2 at 10 to 99 |
5 of its postcodes have a position ONS estimates, so their figures may be for a spot a few hundred metres away.
Over 730 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. 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 L35
WA10 WA9 WA11 WA12 WN4 WN5 WA3 WN3
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.