"Flights have now resumed. Airfield movements were suspended while we investigated this as safety remains our main priority. The military measures we have in place at the airport have provided us with reassurance necessary to re-open our airfield," the airport wrote on Twitter.
The Sussex Police said Saturday they have made two arrests in their probe into the "criminal use of drones" that has resulted in the suspension of flights at Gatwick Airport.
"As part of our ongoing investigations into the criminal use of drones which has severely disrupted flights in and out of Gatwick Airport, Sussex Police made two arrests just after 10pm [22:00 GMT] on 21 December," Superintendent James Collis said in a statement.