Marc Birtel, a Boeing spokesman has said the US aerospace giant expects the much-delayed Dreamliner to have its maiden flight by June 30 on a schedule that puts delivery of the plane to its first customer, All Nippon Airways, in the first quarter of 2010. Boeing has built six Dreamliners to be used in the flight-test program to assure the plane's safety for the company and for regulators, including the US Federal Aviation Administration.