In August booked AA down thru CLT, back thru PHL to Dsm. Had to overnight Friday night in CLT, in order to get to SXM on Saturday. First change in Sept was delay on CLT-SXM flight by a couple of hours. The big change came last week, Our last leg from PHL to DSM leaves 5 minutes before we land from SXM, Obviously not humanly possible, gave it a week, still no adjustment so cancelled, after a great deal of frustration and resistance by AA, and booked our return on Delta. I prefer Delta but when we first booked it was going to work.