correct me, Kev, but wasn't Pinnacle entirely owned by NW at one time anyway? So, yes, E, Pinnacle will be back under its parent again....
The real question in my mind is how DL will use Pinnacle's BK to reduce its 50 seat flying. It is indeed possible that DL could transfer some of the flying to other DCI carriers - perhaps in return for them lowering some of their rates - but I believe Pinnacles fleet is younger than many other CRJs.
It is possible that DL as the likely largest stockholder of Pinnacle could reduce many of Pinnacle's contracts but end of placing the aircraft elsewhere - perhaps swapping the newer CRJs for some of the olders and then turning around and parking them - presumably since the newer ones are apparently lower cost.
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I doubt DL will miss the opportunity to get rid of some RJ flying.... and at the same time, this might accelerate their interest in the 717s - which will be lower CASM aircraft.
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You can't miss that DL is pressuring Pinnacle to quickly dump some US and UA flying just as DL is building up its LGA hub.