in certain irrops situations, it can be quite common for the AAA - Hub leg of a flight to be cxld or severely delayed, but the Hub - BBB leg to be on-time. I saw this a few years ago when flying through ATL as a hurricane hit the east coast. Lots of inbound flights were cxld, but these were largely balanced out by cxld outbound flights to those same cities (i.e. DL still had plenty of available aircraft), hence the hub-destination flights were often undisturbed.