What rules should a passenger follow if he cancels a Turkish airlines flight in 24 hour? booking and travellers don't need to pay any cancellation fee for this. The airlines says that The takeoff date should be at least 7 days at the hour of mentioning flight scratch-off.The 24 hours retraction doesn't cover eGift Certificates, Electronic Vouchers, and Travel Credit Vouchers.Turkish Airlines 24 hour Cancellation approach wouldn't be material on the reservation booked under Miles&Smiles Program.