If you book a flight ticket on a domestic airline and want to cancel your flight ticket, you will pay less than $75 for your airfare. If you have booked a flight ticket, you have to pay a cancellation fee of at least $400 per head.
Turkish airlines cancellation policy says On an international airline and get other services if you want a refund. If you want to initiate the flight change and cancellation process in offline mode, you will have to pay a price of $75 to $300 domestically and $100 to $500 per head. An international airline.