Gatwick is now 12 points clear of Heathrow in the runway polls, which is the largest lead since the first YouGov polls over airport expansion in September 2014.
It also has double digit margins over Heathrow on a number of key themes in the runway debate, scoring higher on the environment, costs for taxpayers, regeneration, competition and speed of delivery.
It remains eight points behind with regard to overall economic benefit to the UK.
Stewart Wingate, Gatwick chief executive, said: “Momentum is with Gatwick as more people recognise it is the only solution that balances the economy and the environment.
“It is also the only plan that is actually legal, so if we want Britain to get on with it the answer is obvious.”
A Heathrow spokesman said: "A third runway will be the UK's best value for money infrastructure project, giving Britain the most connected and sustainable hub airport in the world by adding more than 40 direct long-haul routes whilst meeting environmental and legal air quality limits.
"It's time to follow the Airports Commission's clear and unambiguous recommendation for Heathrow - let's get on with it."
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules here