Ok here's my analysis: It seems like Skywest has the market cornered despite mainline troubles. And to correct one thing, UAL has now exited BK, so only one of SKW's codeshares is in BK. But it seems that SKW has actually had some competition eliminated: They bought ASA, so now they basically do 50% of all Delta's regional work. Is something becomes good for ASA, it's now also good for SkyWest. Secondly, UAL dropped AWAC, and I think SKW has made up the slack for them out of ORD.