There were J/C seats and Y/M/U and even some other economy classes such as B or H on the return but I suspect the flight may be oversold or those Y/M/U are overselling seats since there are available business seats. But I can get leisure seats on aircanada.com for about $1100++ so it cannot be that oversold. If the plane is not completely sold out but Y is oversold but less than the number of J/C seats, I should be able to IKK business class seats IMO... I think this is a call situation since my other option is CO Y award