The biggest impact is that as UA is desperate to merge, their only choice is now US Airways. According to reports today, this merger will result in a significant reduction of capacity. They will have to divest some of their Washington DCA operations. PHL/IAD/CLT are not all that far from each other. LAX/SFO/PHX/LAS/DEN would also be overkill. There should definitely be some opportunities out there for B6. The US/UA merger seems like it would result in a total mess which would also drive more passengers to the likes of B6 and VX.