Boeing's newest plane looks set for another delay before it can finally carry passengers. At Thursday's Morgan Stanley Laguna Conference, Boeing CEO Kelly Ortberg warned that the 777X's certification was behind schedule. A Boeing 777X in flight at the 2023 Dubai Airshow. GIUSEPPE CACACE/AFP via Getty ImagesInitially supposed to enter service in 2020, Ortberg last year announced a further delay to 2026. Then, last month, Korean Air ordered 103 planes, including 20 of the 777X, announced shortly after the South Korean president visited the White House.