Gatwick runway reopens, drone and pilot still unknown
The airport said 765 flights were scheduled for departure and arrival.
Chief executive officer Chris Woodroofe told the BBC police have not yet found the operator of the drones. Police said it was possible they were an environmental activist.
He said extra "mitigating measures" from the government and military had given him "confidence to reopen".
Thousands of passengers remain stranded at Gatwick as police continue their search for those responsible for the chaos, which started on Wednesday night.
Officers have so far failed to locate the drones or their pilot and had been considering plans to shoot a device down.
But Steve Barry, assistant chief constable at Sussex Police, said they were in a "much better position today".
He told BBC Breakfast there were a "number of lines of inquiry" into the "very malicious and criminal behaviour", including the possibility it could have been the work of an environmental activist. ■