The airline was established and started operations in 1978. It initially operated solely as an air taxi and charter service, but developed into a regional airline in 1987. It became a British Airways franchisee on 1 August 1996, operating as British Airways in their corporate design. Sun Air is an affiliate member of the Oneworld alliance and also uses British Airways' frequent flyer program Executive Club. The airline is wholly owned by Niels Sundberg and has 175 employees. It also has an business jet subsidiary called JoinJet.