Memphis, Tennessee-based Southern Airways Express (9X) is a commuter airline that flies to about 20 destinations in the Southern and Mid-Atlantic regions of the United States. It operates from hubs at Destin Executive Airport (DSI), Memphis International Airport (MEM), Pittsburgh International Airport (PIT) and Baltimore Washington International Airport (BWI). Its fleet consists of 14 Cessna 208 Caravan aircraft and nine Piper PA-31 Chieftains, each of which hold nine passengers. In 2016, Southern Airways Express acquired Sun Air Express (6G).