Posted this in the mini-rtw but might be better suited here:

Looking for some advice. Finally about to book my first Business class redemption flights for September but having a heck of a time finding a return route. It's not a mini-rtw but thought I ask here anyways. I have the flights onto Europe figured out but can't find anything on the way back. So far I have:

Sept.3 YYC-IAH Layover(E)
Sept.3 IAH-IST Destination(Y)
Sept.8 IST-CDG Stopover(Y)

I'm looking to come back to YYC anywhere between September 17-20. I just can't seem to find J class returning to US or Canada for those dates. I've tried several cities in Europe for coming back(don't really have a preference) to no luck. Hoping someone with expertise can suggest a way to get back home.
Thx

P.S. Also trying to avoid carriers with surcharges