Hi all -- I'm not sure whether Milesbuzz is the right forum for this question, so please move if appropriate.

My question is what kinds of restrictions are placed on an award ticket that allows one "stopover" along the route.

Is it possible, for example, to stop in a US city to visit friends for several days while on an international award itinerary? If so, do airlines place restrictions on the number of nights you can stop over in a city? Most of the T&C's seem to refer to an "overnight" stop or similar, but do not specify whether that actually means ONE night. Does a stopover need to be on the outbound or return trip? Or does it make any difference? The two programs I am really interested in are AA and UAL, but I'm curious whether there are standard restrictions on these things.

Thanks!