Originally Posted by MasterOfPuppets

The only problem with EWR is rotation of aircraft in a small fleet. ORD needs the 300ER because the UA 200ER are restricted on some days where as the CO 200ER do pretty well (From what I'm told) on EWR - HKG. You could use the other two aircraft for EWR - HKG but that would leave no fleet flexibility 1 CX or long delay would cause a sever downline problem to the operation and the 100+ pax that can not fit on a 200ER.