Thai Airways cancellation policy has several rules and conditions that passengers must adhere to before cancelling their tickets. According to the policy, passengers can cancel their flights within 24 hours of booking without incurring any penalty charges. If the cancellation is made after this period, Thai Airways levies a cancellation fee depending on the fare type and route booked. Passengers can cancel their tickets through multiple channels such as online (via website or mobile app), phone, or ticket reservation offices. Additionally, the airline offers flexibility in terms of rebooking options for cancelled tickets, which vary based on fare class and availability. It is important to note that passengers need to read and understand the terms and conditions pertaining to cancellations before booking their flights with Thai Airways to avoid any financial loss or inconvenience later on.