Founded in 2013, Alsie Express (6I) is a Danish carrier based at Sønderborg Airport (SDG) in Southern Denmark. Sister airline to Air Alsie, Alsie Express is owned by Sandma Holding A/S. It operates non-stop flights between Sønderborg and Copenhagen Airport (CPH). The airline has two ATR 72-500 aircraft, each configured with an all business-class cabin with 48 seats. Its aircraft are also available for charter flights.