The term 'Atlanta-based airline' refers to DELTA, a major American airline headquartered in Atlanta, Georgia. DELTA is the world's second-largest airline in terms of passengers carried and the largest in terms of fleet size. It operates over 5, 400 flights daily to more than 300 destinations in over 50 countries. DELTA is a founding member of the SkyTeam airline alliance and has codeshare agreements with 21 other carriers.