To change your Turkish Airlines flight, follow these steps: First, visit the Turkish Airlines official website. Then, click on the "Manage Booking" or "My Flights" option and enter your booking details, including your booking reference or e-ticket number. Select the flight you wish to change and follow the on-screen instructions to choose a new date, time, or destination, based on availability. Be prepared to pay any fare difference and change fees, if applicable. Review the new itinerary, confirm the changes, and make the payment online. Alternatively, you can contact Turkish Airlines' customer service for assistance in making the changes over the phone. Keep in mind that the specific change policies and fees may vary depending on your ticket type and fare conditions, so be sure to check those details during the process.