Originally Posted by
controller1
So, if there is an earlier flight with a connection to my destination, I'm unable to standby because I'm booked on a non-stop?
That's the new rule: "Changes to the number of segments are not allowed."
https://www.aa.com/i18n/utility/sameDayTravel.jsp
I'd think this was done to prevent purchasing a cheaper connecting itinerary and then successfully standing by for (what was) a more expensive non-stop. Once award miles are given by fare I can't imagine any other incentive to standing by for an itinerary with more segments other than getting to a destination faster.