Thomas Cook — 178 Years Ended Overnight

Thomas Cook’s 178-year run ended more abruptly than any failure on this list—overnight, it left 600,000 travelers stranded worldwide. The 1841 package-holiday pioneer, already carrying £1.6 billion in debt, collapsed in September 2019 after a last-minute rescue fell through. That single day triggered the UK’s largest peacetime repatriation effort, a £100 million operation to fly customers home. The scale dwarfs the stranded-tourist count of any rival travel bankruptcy; for context, it outpaced #10 Wirecard’s collapse in direct human impact. Thomas Cook’s age makes the failure sting deeper: the brand survived two world wars, yet couldn’t weather the shift to online booking and a £200 million margin-call from its banks.