However, the airfield only reopened for a mere 44 minutes before being closed again after a further sighting of the drones.
Airlive.net, a website run by aviation enthusiasts that collects and displays real-time flight data, said all incoming flights to Gatwick were being diverted to other United Kingdom airports, like Manchester and Birmingham, and as far away as Paris and Amsterdam.
According to the airport, the drones were first seen at 21:03 GMT on Wednesday, followed by "multiple reports" of sightings.
The airport advised those heading to Gatwick to travel or collect relatives to check the status of their flight.
"We will update when we have suitable reassurances that it is appropriate to re-open the runway".
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In a statement from on Twitter, Gatwick Airport has announced that they have suspended all flights, both arriving and departing.
It wasn't immediately clear how many flights were affected in total, said Mr Mark Lever, a Gatwick spokesman. He added that passengers had been given the choice between a bus from Stansted to Gatwick, or flying back to Gatwick when the airport reopened.
One passenger confirmed she was finally being let off the plane about six and a half hours after landing.
The statement read: "Due to drone activity on the airfield at Gatwick, all arriving and departing flights are now suspended".
Gatwick apologized on Twitter to affected passengers, adding that safety was its "foremost priority".