Talks will begin in earnest with worker representatives and trade unions about how to achieve the staff cuts, it said.
Reuters reported this month that TUIfly was seeking talks with worker representatives in a bid to complete a broader restructuring.
TUI said its European airlines will be merged into one company, based in Hanover, Germany.
“TUIfly plans to reduce the number of jobs in technical, administrative and crew functions as fewer aircraft are used. In future, TUIfly intends to concentrate on the departure airports of Hanover and Düsseldorf as the largest fleet locations, as well as Frankfurt, Munich and Stuttgart,” it said.