Turkish Airlines has announced that no unused tickets can be refunded. Reservation changes will also be made free of charge.
This description of Turkish Airlines is valid for both Turkish Republic and US passport passengers.
The description of THY was as follows:
"This amendment does not affect our Istanbul transport passengers. Turkish Airlines and Anadolujet flights between 9 October 2017-31 October 2017 for tickets arranged on 9 October 2017 and before Turkey will travel between USA and USA-Turkey, except for Istanbul transfer passengers All passengers with a United States of America, United States passports, will be free of charge by booking changes until 31 October 2017. No unused tickets will be refunded. Partially used, on tickets where travel is incomplete; The unused flight of ticket will be refunded.
T.C. Passport for passengers;
1) Booking changes can be made free of charge.
2) Refund requests: a) No unused tickets can be refunded. b) partially used, on tickets where trip was incomplete; A refund for unused flights of tickets.
3) Extension of ticket term: validity of tickets will be extended to date of October 31, 2017 (inclusive) without any charge difference or penalty.
4) Relevant applications will only be valid on Turkish Airlines and Anadolujet flights. for US passport passengers;
1) Reservation and route changes can be performed free of charge.
2) Refund requests: a) No unused tickets can be refunded. b) partially used, on tickets where trip was incomplete; A refund for unused flights of tickets.
3) Extending ticket time:
The validity of ticket will be extended to date of October 31, 2017 (inclusive) without penalty of any fees or charges.
4) Relevant applications will only be available on Turkish Airlines and Anadolujet flights. "