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 plc and all UK entities including Thomas Cook Airlines entered compulsory liquidation on 23 September 2019.
JMC Airlines, a UK charter airline formed by the merger of Caledonian Airways and Flying Colours Airlines, following the purchase of Thomas Cook & Son by the Carlson Leisure Group. JMC Air was named after the initials of the son of Thomas Cook, John Mason Cook. The airline was rebranded and remodelled in March 2003 to Thomas Cook Airlines UK.