Hi, I did 8RT on RJ's CAI-KUL sector flight for TP run purposes this year. I flew most of the seg with flex option.

If I tell you what I know

1. It's only going to change until the day before boarding As far as I know, on the day of departure, the change has to be changed with a no-show penalty. I remember asking CS on the phone, but I'm not sure..

2. Even if you purchased with flex option (their flex option is issued as C, J) if the available fare for the day is more expensive than the fare you issued, you have to pay the difference.

example, if your ticket is issued as C and the remaining fare is J, you have to pay the difference And I remember that you can't specify it when you buy it

I'd say go to ARN the day before, but you decide