The carrier had more than 2,500 outstanding county court judgments (CCJs) totalling almost £3.2 million although it told Which?, the magazine that published the data, it had satisfied most cases.
Court data for the period to the end of September showed Tui had 1,359 pending cases, owing £1.56 million. EasyJet owed £387,000 to 512 applicants, with Ryanair, British Airways registering far smaller amounts and Jet2 just four outstanding.