United weighs what to do with Boeing 737 Max 10 seats as delivery slips
United CEO Scott Kirby says hundreds of Boeing 737 Max 10 lie-flat premium seats ordered years ago have stayed in storage because aircraft certification is far behind schedule, pushing the expected start of flights to summer 2027. United has instead accelerated premium cabin upgrades on some Airbus A321neo aircraft with Polaris suites and related seating options.