Which Boeing is the biggest?

The largest Boeing is the 747-8, the final version of the Jumbo: 76.3 m long, with a 68.4 m wingspan, 19.4 m tall, and a maximum takeoff weight of 447.7 t (987,000 lb). It is the longest passenger aircraft ever to enter service and the only double-deck aircraft the company has built. The Intercontinental version seats 410 passengers in three classes according to Boeing, and the 747-8F freighter carries up to 137 t, with a nose-loading door that allows oversized cargo to be loaded. Four GE GEnx-2B engines give it a range of about 14,300 km. It first flew on 8 February 2010, and the last 747, an 8F, was delivered to Atlas Air on 31 January 2023, closing 54 years of production in Everett.

The 777-9, the largest variant of the 777X, will be slightly longer than the 747-8, at 76.7 m, and will have a 71.8 m wingspan thanks to folding wingtips that reduce it to 64.8 m on the ground to fit existing airport gates. It will weigh less, 351.5 t, because it flies with just two GE9X engines, the largest certified turbofans, and will seat 426 passengers in two classes. It is still awaiting certification (as of May 2026). Once in service it will be the largest twin-engine airliner in the world and the longest Boeing, but the 747-8 will keep the title of heaviest.

Apart from the production models, Boeing operates the Dreamlifter, a converted 747-400 with a widened fuselage and 1,840 m³ of cargo volume, three times that of a 747-400F, used to transport 787 sections between Japan, Italy and the United States. By volume it is the largest Boeing in existence, though it has never been sold: there are only four, and all work for the 787's own assembly line.