It is looking more and more likely I will have to change flights. AC advised $400 change fee, plus differential and I can change to any flight in the next 365 days.

It's fairly time consuming searching for flights on AC web site to various locations in various months.

Is anyone aware of a search engine that quickly allow me to look for AC flights with the following parameters?

J flight to anywhere, but preferably Asia (I need 15,000 miles aprox to get to *Gold). Cheaper the better ! Hopefully Nov or Dec.