Ugliest Plane Ever: Boeing’s Dreamlifter Is the World’s Longest Cargo Plane The Dreamlifter is Boeing’s largest bulky cargo freighter, and is used exclusively for Boeing’s 787 Dreamliner supply chain, where the Dreamlifter transports 787 wings and other components inside its enormous cargo hold. Here's What You Need to Remember: Boeing’s Dreamlifter is certainly one ugly duckling, though its worth is not in looks but in its practicality. It greatly simplified the parts supply chain for the 787 Dreamliner. And if that’s not enough—it even holds a world record to boot—longest cargo loader in the world, at just over 118 feet long. Not too bad for the world’s longest—and ugliest plane.