I was looking at doing a weekend hop from SCL to MVD. In searching the fares I find that regular categories of economy ranging from U$85 to U$450, but the Premium Economy shows as U$215! This is cheaper than two of the other four economy fare categories. Since the lowest fare only gives me partial mileage in AAdvantage, it would be about $100 a/i more to opt for Premium Economy over the next higher economy fare. So what gives?