Delta Air Lines will board passengers back to front in an effort to prevent the spread of Covid-19. The change will remain in place at least through May 31. By boarding from back to front, the airline said, there's less chance passengers will have to pass each other as they find their seats. Delta One and first class passengers, as well as Diamond Medallion members, will be able to board as usual. This month, Delta initiated a spaced boarding process that allows fewer passengers at a time to board to prevent potential exposure to coronavirus. In addition to the new back-to-front boarding process, Delta has taken a number of safety measures, including providing crews with masks. Customers are asked to bring their own masks.