Their not selling the whole plane at $500 a seat. The prices go from $900 to $2000 IAD-STN one way, and the flights from NY with over 40% of the seats sold have the lowest of the 5 tiers sold out. Same model as jet blue, as the seats fill, it goes up. Figure $85K at 80% to $135K on a full flight. They can always shift the points where the low fares start dropping away.