Gatwick Airport remains “ready to proceed” following the green-light for expansion at London Heathrow earlier.
In a statement the airport said it “noted” the government announcement, but remains confident it could deliver additional capacity in the south-east quicker.
Gatwick chief executive Stewart Wingate said: “We are disappointed as we do not believe this is the right answer for Britain.
“Gatwick has put forward a credible financeable and deliverable plan for expansion.
“It is a plan that can guarantee growth and guarantee certainty for Britain.
“We look forward to studying the full reasons behind the government decision in detail.
“The challenges facing Heathrow have not changed.
“Our message today is that Gatwick stands ready to proceed when the time comes.”
Gatwick Airport is the UK’s second largest airport and the most efficient single-runway airport in the world.
It serves more than 220 destinations in 80 countries for 42 million passengers a year on short and long-haul point-to-point services.
It is also a major economic driver for the south-east region, generating around 21,000 on-airport jobs and a further 10,000 jobs through related activities.