Turkish Airlines is switching operations at Gatwick from the North to the South Terminal.
The change coincides with the start of summer schedules on Sunday (March 29).
It follows a strategic review of terminal operations by the airport in a bid to ease passenger journeys and simplify operations.
Turkish Airlines general manager for Heathrow and Gatwick, Osman Battal, said: “We are pleased to announce our move to London Gatwick’s South Terminal.
“As we are committed to providing our customers with the best possible service, this move will ensure all operations are now streamlined in one place.”