The contract with US ends sometime in 2015. It could possibly be extended but from what has been floating around it would only be for something like 25-30 of their CRJ-200's and the rate structure would have to be much lower then it currently is. Airways has not been happy with ZW for years and at one point had looked to end the contract outright, but there were 2 things that didn't benefit them (US), 1 being they had no replacement to fly all of the routes that would be available and the other was a financial penalty for ending the contract early. So US has been basically stuck with them. There still is the possibility that ZW will continue to fly for US/AA for years to come but it would be in no way as large of an operation like it is today (71 a/c) and as always its all about the mighty $$$, if someone can do it cheaper the flying becomes theirs. Will be interesting to see what happens.