More homes near Gatwick can now claim noise insulation grants, bosses at the West Sussex airport have announced.
The noise boundary at Gatwick has been increased by 15 kilometres (nearly 10 miles) each end of the runway.
This means more than 1,000 more homes in Surrey, Sussex and Kent are covered by the scheme.
Gatwick chief executive Stewart Wingate said: "The leadership position we have taken on aircraft noise today shows the importance we attach to our local community as we continue to compete and grow from a single runway, but also as we plan to build a second.
"We understand that the public's tolerance to noise is much lower than it was, which is why we are now extending our noise insulation scheme."
Meanwhile, Gatwick will announce during this month the result of an internal review of the Christmas Eve chaos at the airport which led to flight cancellations and long delays for passengers trying to get away for the festive break.
Mr Wingate has said that around 20,000 passengers were unable to fly on December 24, with the problems being caused after the nearby River Mole flooded leading to a power outage that restricted services.
The internal review is being conducted by a Gatwick non-executive director David McMillan.