Abstract: A cargo transfer assembly structured to move baggage, handicapped vehicles such as wheelchairs, and other cargo between a passenger boarding bridge and the tarmac, ground or other supporting surface on which the boarding bridge is positioned. A lifting assembly having a lift apron and a lift tray connected thereto is movable between a raised position and a lowered position. A mobile cart structured to carry the cargo thereon is removably mounted on the lift tray and movable therewith in accessible relation to the boarding bridge and the supporting surface when in the raised position and lowered position respectively. A leveling assembly is disposed and structured to align the lift tray with the support surface when in the lowered position and with a corresponding portion of the base of the boarding bridge, when the lift tray is in the raised position.