Kelly Ortberg, chief executive officer of Boeing Co., during a media event at the Boeing Delivery Center in Seattle, Washington, US, on Wednesday, Jan. 7, 2026. M. Scott Brauer | Bloomberg | Getty Images RENTON, WASHINGTON — Boeing will begin building new 737 Max airplanes on July 6 at a final assembly line it's opening north of Seattle, CEO Kelly Ortberg told CNBC on Friday.