Thomas Cook Airlines Limited was a British charter and scheduled airline headquartered in Manchester, England. It was founded in 2007 from the merger of Thomas Cook Group and MyTravel Group, and was part of the Thomas Cook Group Airlines. It served leisure destinations worldwide from its main bases at Manchester Airport and Gatwick Airport on a scheduled and charter basis. It also operated services from eight other bases around the United Kingdom. Thomas Cook Group and all UK entities including Thomas Cook Airlines entered compulsory liquidation on 23 September 2019.

Thomas Cook Group plc was a global travel group, headquartered in the United Kingdom and listed on the London Stock Exchange from its formation on 19 June 2007 by the merger of Thomas Cook AG — successor to Thomas Cook & Son — and MyTravel Group until 23 September 2019, when it went into compulsory liquidation. The group operated as a tour operator and airline, and also operated travel agencies in Europe. At the time of the group's collapse, approximately 21,000 worldwide employees were left without jobs and 600,000 customers were left abroad, triggering the UK's largest peacetime repatriation.