Hapag-Lloyd Flug (between 2005 and 2007 also marketed as Hapagfly) was an airline based in Langenhagen, Lower Saxony, Germany. It operated scheduled and charter passenger flights, mainly to holiday resorts in Europe. In January 2007 in a restructuring, it combined its operations with Hapag-Lloyd Express to become TUIfly, for which it operated all flights, while Hapag-Lloyd Express marketed them until TUIfly got its own license.

The original HAPAG company first became involved in the aviation industry in 1910, sponsoring Zeppelin flights.

Hapag-Lloyd Flug was established in July 1972, when the Hapag-Lloyd shipping group bought a few Boeing 727s to fly its cruise passengers from Germany to the ports of call for the cruises. It began operations on 30 March 1973. Through the years, the airline added regular passenger flights to its schedule, as well as new airplanes, such as the Boeing 737-800 and Airbus A310 aircraft. Since 1997, it has been a subsidiary of TUI AG, which also includes the Hapag-Lloyd cargo container line and cruise line.

In November 2005, the airline changed its name to Hapagfly due to the new marketing strategy of the TUI Group. In January 2007, it was merged into the new cooperation TUIfly with Hapag-Lloyd Express.

Hapagfly operated services mainly to European holiday resorts. Most of them are now operated by TUIfly.

Over the course of its life, Hapag-Lloyd Flug operated all of the following aircraft, primarily through aircraft leasing from companies such as International Lease Finance Corporation (ILFC) and GECAS. It is also the first operator of the most popular 737 800 Next Generation series that first commenced operations in 1998.

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