Limits for Night Flights at Heathrow

The movement limit only relates to aircraft movements during the night quota count period, 11.30pm to 6.00 am. The use of the supplementary quota system is to encourage the use of quieter aircraft. The aircraft types are given a 'quota count' (QC) value according to how much noise they make on landing or take off of QC0, QC 0.5, QC1, QC2 and QC4. Aircraft  movements score these QC values against a maximum allowable quota for each season.

Table of maximum noise quota points for London Heathrow up to the year 2012 (from 30th October 2006)

Table of maximum number of aircraft movements for London Heathrow up to the year 2012

(from 30th October 2006)

(At Heathrow the above figures equate to about 16 flights per night period, which is between 11.30pm - 6.00am)