Flightline was a British airline that operated charter and wet lease services, primarily serving leisure and ad hoc charter markets. The carrier held an Air Operator's Certificate in the United Kingdom and provided capacity to tour operators and other airlines requiring additional lift. The airline operated a relatively small fleet and focused on seasonal and contract flying rather than scheduled route operations. Flightline was known for flexibility in its operations, catering to a variety of charter clients across Europe and beyond. The airline ceased operations, as many small UK charter carriers struggled to remain viable in an increasingly competitive aviation market. Its IATA code B5 and ICAO code FLT were associated with its operating period in the UK regional and charter sector.