Used to be, on an xONEx, two airports in the same city were deemed co-located and a transfer between them did not count; e.g., xxx-LGA//JFK-yyy counted as two segments. Not any more: nowadays it counts as three.

But how does co-location apply in regard to the Oneworld Explorer Rule 4(d), 'Travel may not be via the point of origin'? Would, for example, LGA-aaa-JFK-bbb ... be allowed, or would they say LGA and JFK are both NYC, so same 'point of origin'?