TUIfly is a German airline that was founded in January 2007 as a cooperation of Hapag-Lloyd Flug and Hapag-Lloyd Express whose brands Hapagfly and HLX.com are no longer used. All flights are operated by Hapag-Lloyd Flug while Hapag-Lloyd Express markets them.
TUIfly offers both charter and low-cost flights. With a fleet of currently 54 Boeing 737 aircraft, TUIfly is Germany's third largest operator, only surpassed by Lufthansa and Air Berlin.