The Blues face Bayern away on Saturday in the second leg of their Champions League last-16 clash.
Players such as Mason Mount, Tammy Abraham, N’Golo Kante and Reece James were seen boarding the flight, while Ruben Loftus-Cheek is back available again after injury.
Lampard’s team face a considerably difficult task as they attempt to overturn a 3-0 deficit from February’s first leg.
As Chelsea head to the Allianz Arena, the scene of their Champions League final success against Bayern in 2012, Lampard will be determined for his team to at least give a good account of themselves.
Chelsea will be eager to respond following their defeat to Arsenal in the FA Cup final last weekend.
Lampard will have to cope without Cesar Azpilicueta, Pedro and Christian Pulisic, who all suffered injuries against Arsenal.
Five talented youngsters – right-back Henry Lawrence, left-back Ian Maatsen, centre-back Dynel Simeu, midfielder Lewis Bate and forward Armando Broja – have been added to the B-list of Chelsea’s Champions League squad ahead of this game.