I'm starting this late, but I decided to use up my BA miles while I can in South America while the going is still good. But I need help. I've been accumulating miles but have never spent any! Can anyone advise if this itinerary looks ok at first glance? All flights show as available on BA's website, so I assume they are really available (and I'll just have to call to book - $20 fee is fine). NYC-LIM(stop)-IPC(stop)-SCL(destination, stop))-MDZ-AEP(stop)/EZE-NYC, mid-May I assume AEP and EZE count as co-terminal airports - routed that way to avoid a reciprocity fee. Will I encounter any others? Two of us are going, but I only have the 100K BA miles, so it'll be in economy, alas. I wish it were in biz. 80K total, by my understanding. Do date changes cost anything if I need to make them?