Jetairfly is a Belgian airline with its centre of flight operations in Zaventem, Belgium. It operates scheduled passenger flights. Formerly known as TUI Airlines Belgium, it adopted its new name in 2005. Jetairfly is a part of the largest leisure fleet in Europe: together with seven other airlines which are linked together by the virtual alliance TUI Airlines.
TUI Airlines Belgium was created in 2003 as home carrier for tour operator Jetair, part of tourism group TUI AG. In 2012 Jetairfly announced that Jet4you, a low-cost Moroccan carrier and also a subsidiary of the TUI AG Group, would be fully integrated in Jetairfly. The merger was complete in April 2012.