I used ETC's from last year to book flights to KOA for this October all on UA metal as required by the T&C of the ETC. Now that they have started flying the Dreamliner to KOA, OGG and HON, I might be interested in flying that plane for the first time. Hopefully they keep the Dreamliner flights to OGG into October, but if I have a change in my current flights, would I be able to change to one of the flights through OGG and HON that would involved a leg on Hawaiian or will the ETC restrictions prevent me from changing to those routes?