Originally Posted by
headinclouds
According to AA RTW desk last month, if you use the transit w/o stopover exception to enter a continent more than once, the entry and exit city must be the same. One of the experienced agents (now retired) told me that there were abuses of this rule. It was permitted in the past if the total time was less than 24 hours, but no more.
That certainly was the case with regard to transiting the US a second time, for itineraries commencing in SA, but I'm not sure whether that applies to Asia, as well.