Fixed point air fares

So just playing with some data on commercial airline fares.  Anyone notice some interesting convergence of late in this:

 

 I thought the story was that one benefit of the USAirways dehubbing here is that at least our air fares are now relatively inexpensive. I guess compared to where they were a decade ago that is true, but the competive advantage compared to elsewhere looks to be evaporating. If the trends in this data continue then next quarter may be a fixed point.