Pasting below introductory portion of email I received yesterday as AA Plat...full integration 10/17. No changes on AS website (yet?) regarding credit on the merged AA entity...
In March, we announced we would shift to one reservation system later this year. And now, we're on track to transition all US Airways flights to American flights on October 17. At that time, we'll be one airline with one website and mobile app, and we'll have one set of travel policies and elite benefits.
We're working hard to make sure this final milestone to becoming one airline for our customers goes smoothly. During the week of July 18, we'll begin transferring existing US Airways reservations for travel on or after October 17. As of July 18, all flights departing on or after October 17 will be American flights
--mcz