The following list of guidelines is part of Turkish Airlines' flight change policy:
What can you modify using Turkish Airlines' Change Flightoption?
Altering the Travel Date
Name Correction/Change for Passenger
Terms and Conditions of Flight Changed by Turkish Airlines
According to Turkish Airlines' change flight policy, travellers or passengers may modify their tickets up to 24 hours before departure.
The transporter will charge the full ticket price as a Turkish Airlines Change Fee if the customers modify their airline tickets within 24 hours of departure.