Tom Denton, Head of Corporate Responsibility at Gatwick, said: "This project gives us an opportunity to further reduce the number of people affected by noise, as well as focus on further reducing CO2 emissions and air-quality impacts.
"Therefore this is an important time for local people and those who live within our flight paths, who now have a once-in-a-lifetime opportunity to give their feedback and influence the future of our airspace."
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Donald Trump is to visit the UK on July 13 and hold bilateral talks with Theresa May, Britain's ambassador to the US has said.
The Football Association has announced it has received an offer to buy Wembley Stadium.
The most hotly-tipped date is July 13, following the Nato summit which the president is due to attend in Brussels on the previous days.