A total of 24 out of 50 carriers performed poorly on at least one measurement of noise, emissions and unscheduled night flights between January and March, according to f igures published by the west London hub.
Israeli airline El Al was ranked bottom of the list, below Kuwait Airways, Middle East Airlines and Pakistan International Airlines.
British Airways’ short-haul flights had the best record, with Aer Lingus the runner-up and Etihad Airways in third place.
It is the first time Heathrow has included airlines’ emissions in its quarterly environmental ratings.