The title of “world’s largest private jet” is currently held by the Boeing Business Jet (BBJ) 777-9, a variant of Boeing’s 777X series. This aircraft offers an unparalleled combination of size, range, and luxury, making it the pinnacle of private aviation and the ultimate choice for ultra-high-net-worth individuals, heads of state, and corporate leaders seeking long-range, luxurious travel. Although you can put in your orders, this aircraft has yet to go into delivery, so don’t get too excited.