I presume the answer is no, but wondering if the following is possible:
Booking an Aeroplan reward in Economy Latitude, using eupgrade credits on AC (i.e. YOW-YVR-SYD) into J, but then on the same itinerary continuing on with a partner airline (in this case, Virgin Australia going from SYD to DPS). Is that permissible, or would I need two itineraries?
Thanks!