Piedmont Airlines, Inc. is an American regional airline operating for American Eagle, formerly US Airways Express. It is a wholly owned subsidiary of the American Airlines Group, headquartered in unincorporated Wicomico County, Maryland, near the city of Salisbury. It conducts flight operations using Bombardier Dash 8 aircraft. Its main base is Wicomico Regional Airport, Salisbury, with hubs at Philadelphia International Airport and Charlotte Douglas International Airport.