British United Island Airways (BUIA) was formed in November 1968 as part of a reorganisation of the BUA group of companies. It was a regional sister airline of British United Airways (BUA), Britain's largest wholly private, independent airline of the 1960s. It operated a network of regional, short-haul scheduled routes linking a variety of destinations within Europe, including year-round services from both Channel Islands to BUA's Gatwick base.