Gatwick should build a new runway rather than Heathrow, according to a majority of residents across Kent and West Sussex.
People living in all 20 local council districts and all-parliamentary constituencies across the two counties said a new runway should be built at Gatwick.
Most people polled by YouGov in Kent and West Sussex also felt that a bigger Gatwick was best for the local economy.
More than 1,000 people from each county were quizzed in two separate surveys.
More than half (52%) of West Sussex residents think that Gatwick should be expanded, rather than Heathrow (31%), the polling found.
Meanwhile, almost twice as many people in Kent (47%) think Gatwick should be expanded rather than Heathrow (25%)
Airport chief executive Stewart Wingate said: “Today’s results show that the majority of residents in all districts of Kent and West Sussex, both young and old, think Gatwick should be expanded.
“We are also seeing increasing public, business and political support throughout the UK as momentum gathers behind Gatwick’s credible and compelling case for expansion.
“This growing support demonstrates the recognition that a new runway at Gatwick would boost the UK economy at a fraction of the environmental impact of Heathrow today.
“Expanding Gatwick can also be delivered at no cost to the taxpayer, whereas Heathrow would cost the public purse at least £6 billion at a time when public money is scarce.”