There's certainly been a history of low-fare carries going by the wayside,

It's probably too little too late.

This process has plagued other airline mergers, and brings a risk of operational disruption or added costs.

The combined entity will face significant hurdles, particularly integration of its labor forces.

With these fuel prices, they've gone through cash quickly, ... Their strategy might work, but the question is if they have enough time to test it.

Some of the capacity will go away if fuel prices stay this high. It (oil prices near $50 a barrel) could hasten US Airways' demise.