Herne Hill is impacted by aircraft from both Heathrow and London City.
When a west wind is blowing (70% of the year) it can be overflown by more than 40 planes an hour heading for Heathrow. When there is an east wind, all the planes landing at London City pass over in a narrow, concentrated flight path. The City aircraft are low – no more than 2,000 ft – because they must fly below the Heathrow airspace. On some days when there is only a light east wind blowing, Herne Hill is overflown by aircraft landing at both airports – over 50 planes an hour.