I may be mistaken but under the RTW rules I was under the impression that chnages were possible after commencement of the journey with no additional fee. So, during my lates RTW while checking in at CPT I wanted to chnage my FRA-LHR flight to one departing 2 hours later. I was told it will cost me 75USD!! Needless to say I did not chnage my flight. Is this fee standard? It was a CSTARRTW