A Delta flight departing from Detroit had to turn around when customers refused to wear face masks amid the coronavirus pandemic."On July 23, Flight 1227 from Detroit to Atlanta returned to the gate following two customers who were non-compliant with crew instructions," Delta confirmed to FOX Business. "After a short delay, the aircraft departed to Atlanta."The incident occurred as airlines are grappling with both reduced passenger numbers and passengers' fears of contracting the virus in close quarters.An undated file image shows a Delta Air Lines plane in flight.