The milestone marked five full years of month-on-month growth at the airport, and it believes that the success will contiunue with the addition of new services in 2018.
They will include a new service to Doha with Qatar Airways launching flights to Qatar from May 2018.
Gatwick’s busiest-ever February was fuelled by further significant growth in the airport’s long-haul routes, which were up 16.7%.
Cargo volumes also soared by 37.2% during the month.
According to Gatwick, its Asia routes "performed particularly well in February", as thousands of passengers travelled to and from the Far East to celebrate Chinese New Year.
Hong Kong (+74.4%) and Tianjin (+12.9%) recorded the biggest year-on-year increases.
It was a similar healthy picture on many of Gatwick’s transatlantic routes where Fort Lauderdale (+80%), Oakland and San Francisco (+67.6%) and New York (+43.4%) saw the highest growth rates.
Due to demand, Norwegian announced that they will be providing passengers even more choice with additional frequencies, on transatlantic routes, adding 150,000 extra seats from Gatwick this summer.
The airline also starts new routes to Austin and Chicago this March – adding to their new already popular Buenos Aires service which launched in February.
Gatwick has also been crowned London Airport of the Year, this month, at the London Transport Awards with the airport’s £2.7 billion investment programme and North Terminal transformation programme singled out for praise alongside the high standards of customer service delivered throughout the process.
Gatwick Airport Chief Executive Officer Stewart Wingate said: “Our February traffic figures mark five consecutive years of growth and during this time Gatwick has been transformed by our ongoing £2.7 billion investment programme.
"Our passengers now have a wealth of choice through an extensive route network – including over 60 long haul routes a variety of airlines plus world-class airport facilities.
“I am delighted to welcome Qatar Airways to Gatwick for this exciting new double-daily service to Doha.
"Our existing airlines are also providing even more choice for passengers with Norwegian starting routes to Austin and Chicago this month while also adding 150,000 extra seats on their transatlantic services from Gatwick this summer.
“February’s passenger figures are the latest demonstration of Gatwick’s importance as a vital piece of UK infrastructure providing global connectivity at a time when the country needs it most.
"We have exciting plans for growth maximising the use of our existing facilities whilst we also offer the country the prospect of a financeable and deliverable new runway scheme.”