Unfortunately no. You can transfer Aeroplan points to US Airways points though using points.com. If you temporarily move to the US while you are doing such a transfer you will get a better rate.

I am unsure about the stopover capabilities on US Airways redemptions but you won't be charged fuel surcharges if you book with them. Unless you are an SE who was planning on using IKK to get a seat you will find the same availability on both airlines.