The crossword solution for the term DELTA, FOR ONE is AIRLINE. Delta Air Lines, Inc., commonly referred to as Delta, is a major American AIRLINE, with its headquarters and largest hub at Hartsfield–Jackson Atlanta International Airport in Atlanta, Georgia. It is the world's second-largest AIRLINE in terms of scheduled passengers carried, revenue passenger-kilometers flown and fleet size. Delta operates over 5, 400 flights daily and serves an extensive domestic and international network that includes 304 destinations in 52 countries on six continents.