Copterline was a Finnish-Estonian helicopter airline that flew a regular 18-minute service on the Helsinki–Tallinn route. Copterline flew an AgustaWestland AW139 helicopter. Copterline OÜ (Estonia) was the flight operator, and FastClass Oy (Finland, former Line Support Oy) was the parent company, which was responsible for maintenance. The predecessor of Line Support was the Finnish company Copterline Oy (1990–2010). In March 2016, Copterline OÜ filed for bankruptcy for the second time.