The U.S. Air Force on Wednesday awarded a $383 million contract for more launch services to United Launch Alliance, a joint venture of Boeing Co (BA.N) and Lockheed Martin Corp (LMT.N), bringing the total value of the contract to $4.08 billion. The Air Force said it was adding three pre-priced launches to the existing contract, including the launch of a National Reconnaissance Office satellite that privately held company Space Exploration Technologies, or SpaceX, had hoped to win. SpaceX declined comment.