Delta Air Lines was the second airline – behind only Qatar Airways – to launch business class suites with doors into commercial service. American Airlines is going to enclosed suites with their Boeing 787-9 and Airbus A321XLR new aircraft deliveries in 2024. British Airways has been putting doors on business class seats, and Air France is going to be doing the same.
United Airlines isn’t going to be left behind in this race. In fact they’ve been vetting new seats with doors for a new Polaris product, as I reported this past spring.