CSA Air

CSA Air is a cargo airline based in Kingsford, Michigan, United States. It operates express cargo services in Michigan, Wisconsin, Indiana and South Dakota, operating 34 flights a day. Its main base is Ford Airport in Iron Mountain, Michigan and its air traffic control call sign Iron Air is derived from that city. It exclusively serves as an affiliate of FedEx Feeder, a regional service that operates as a subsidiary of FedEx Express.