Gatwick has recorded £127.3 million in pre-tax profits for the six months ending September 30th.
During this period, the airport reported strong growth, with passenger volumes increasing by 4.4 per cent to 20.8 million from 19.9 million a year ago. In October alone, 3.1 million travellers passed through its doors.
Its earnings before interest, tax, depreciation and amortisation was £196.7 million, up 14.4 per cent from £172 million.
The airport also documented underlying traffic growth at 3.5 per cent, adjusted to cater for last year's London Olympics.
Chief executive officer Stewart Wingate said: "Our results show a strong financial performance but we must not become complacent. We must continue to invest and ensure we remain competitive."
Mr Wingate stated the facility was attracting services and routes previously only found in Heathrow. The official also argued Gatwick's potential for expansion, referring to the upcoming Davies Commission, which is currently assessing the best way to improve the south-east and London's air capacity.
He said: "The UK's next runway has got to be at Gatwick."