The Competition and Markets Authority has been investigating Tui following “thousands” of complaints from customers who did not receive refunds within the 14 days required under consumer protection laws.
The CMA said Tui “has engaged constructively” with it and has now agreed to pay all outstanding refunds by 30 September.
The CMA said: “Some customers may have accepted refund credit notes. It is important they know they are entitled to a cash refund as an alternative. Tui UK has now agreed to contact customers who have an unused credit note, to let them know they can convert it to a refund, which will be paid within 14 days.