Originally Posted by
RTWFF
That's not my understanding. Any changes trigger the need for more miles
if ticket was ticketed before devaluation, any date change or time change will not need any extra miles up to 1 year valid.
additional miles are required only if you change your origin or destination or any other changes in class or aircraft metal (reissue of ticket).
https://s3-ap-southeast-1.amazonaws....144003/sq1.png
refer to SQ official reply above