Are there any regulations regarding how far in advance a flight ticket can be changed, and is there a fee for ticket changes?

Hello, the regulations and fees for flight changes depend on the airline and the type of ticket. Generally, airlines will specify the time range for flight changes and charge corresponding fees. Some tickets may not be eligible for changes, or flight changes may require paying high fees. It is recommended that you carefully read the airline’s regulations and policies when purchasing tickets to avoid unnecessary losses. If a flight change is needed, you can contact the airline in advance or make the change through online channels.
Change the reservation for the China Airlines CA8981 economy class ticket
Hello, the regulations and fees for flight changes depend on the airline and the type of ticket. Generally, airlines will specify the time range for changes and charge corresponding change fees. Some tickets may not be eligible for changes, or changing them may require paying high fees. It is recommended that you carefully read the airline’s regulations and policies when purchasing tickets to avoid unnecessary losses. If a change is needed, you can contact the airline in advance or make the change through online channels.
Change the booking of Air China CA8981 economy class ticket