Within 24 hours of purchase, a traveller has the option to cancel their tickets and receive a full refund. Why spend money when you may cancel your flight without spending a dime. Turkish Airlines Change Flight offers all clients better service. You can easily pay for the ticket with a full refund if it is not advertised. Tickets that are non-refundable and non-refundable tickets can both be fully refunded up to 24 hours before departure. To cancel your Turkish Airlines reservation, get in touch with the customer service department directly.