Originally Posted by
AwardBee
If OP is OJ'ing in middle of trip and wants to close that OJ, is that changing the D, or is only one end of a OJ considered the D? What if someone wants to SO in a different city, is that also considered change of D?
That's changing the cities you fly from when you start/stop flying (as opposed to routing changes where startpoints/endpoints stay the same, but connection points in between change). I'd say that's changing your origin or departure.