Delta Air Lines has added a total of 460 names to its no-fly list since April for refusing to wear masks onboard.<br />CEO Ed Bastian said "Wearing a mask is among the simplest and most effective actions we can take to reduce transmission".<br />Business Insider reports that Bastian went on to say that the company requires customers and employees to wear masks.<br />The Atlanta, Georgia-based airline began requiring non-vented fabric face coverings during flights in May.<br />Bastain sees mask-wearing as a crucial step in getting the airline safely through the fall and winter months.<br />Delta is also one of only two major US airlines that block the middle seats on planes for social distancing.