The first flight lasted 4 hours, 25 minutes and flew primarily over Washington state. During the flight, the pilots took the airplane to an altitude of 19,000 feet (5,791 meters) at speeds up to 250 knots (288 mph, 463 kilometers per hour). The airplane may look like its famous predecessors, but the wings, engines and flight deck are new, and the upper deck has been stretched to new lengths.