Following the collapse of Thomas Cook in September holidaymakers are still owed tens of millions of pounds due to outstanding claims.
The UK Civil Aviation Authority (CAA) said they have paid 75% of claims amounting to more than £200m for 250,000 claims.
CAA chief executive Richard Moriarty said they are in the process of undertaking the “largest and most complex” travel claims operation in the UK.
The Insolvency Service said £585m was still owed to customers for package holidays and flights along with other services after the tour operator collapsed.
Atol is only refunding Thomas Cook’s package holidays and are not refunding flight only bookings.
Moriarty said, “We want to ensure we get the right amount of money back to the right people as soon as we can, and we have so far paid out over £200m by settling over a quarter of a million claims, 75% of the total we have received.
“We understand that those consumers that have not been paid yet have had to wait longer than we had hoped, and we are doing all we can to process these claims as soon as possible.
“Unfortunately, our operation has had to include extra checks and processes owing to the quality of the information we received from Thomas Cook’s systems and the potential threats of scams and fraud.”