Delta Air Lines operates a regional service.
Delta Air Lines . The airline along with its subsidiaries and regional affiliates operate over 5,400 flights daily and serve an extensive domestic and international network that includes 319 destinations in 54 countries on six continents , as of October 2016 . Regional service is operated under the brand name Delta Connection . Delta Connection is a regional airline brand name for Delta Air Lines , under which a number of individually owned regional airlines operate short - and medium-haul routes .