I have bought a RTW in Business and will be starting from Seoul next month.
Now I need to change some routings in the middle of the trip (within USA). Shall I re-issue the ticket after flying the 1st sector?
It depends.... Has the fare gone down from RTW's starting in ICN? If so, you may be able to take advantage of a new fare by reissuing now. Otherwise, I would wait until after the first segment.