Why do people post when they don't know the answer? There will ALWAYS be a change fee to rebook an unused ticket regardless of maintaing or changing route. With the only exception being an IRROP. And Air Canada changes online can only be done with active bookings! Not unused credits as OP states they plan to have. You must call in. No name changes. Flight can have other carriers on it but the majority needs to be with AC flight numbers
Why do people quote people and leave out parts of their posts ?
I do "know" what my experience has been and posted that, I guess that was wrong thing to do.