Report Thomas Cook Airlines Now Defunct in ATC Simulators Posted October 30, 2019 On 10/28/2019 at 11:44 AM, cHabu said: The majority reason Thomas Cook went under is the fact that more and more travelers do not buy package deals via such airlines anymore. Using websites and apps you can now search for your own cheap hotel and tickets. Thomas Cook did not 'go with the flow', changed their company policy in time to become 'just a normal airline; if you will. Now it has to pay the cost for that. Basically, that's what I said? "Thomas Cook were slow to move with the times like other airlines were doing"