Thomas Cook AG was an Anglo-German, global travel group. The group had its headquarters in Rochdale, and sold products such as package holidays and flights through its 3 in-house airlines. On 19 June 2007, the group merged with MyTravel Group plc to form the Thomas Cook Group plc, which was listed on the London Stock Exchange.

MyTravel Group plc was a British, global travel group headquartered in Rochdale, England. It was founded in 1972 as Airtours Group. The group included two in-house airlines, MyTravel Airways UK and MyTravel Airways Scandinavia, and various tour operators around the world. On 19 June 2007, the group merged with Thomas Cook AG to form the Thomas Cook Group plc.