Just wanted to quickly inform successful changes made on my *A award into OW post travel of the outbound.
Originally had YUL-ICN with star alliance carriers and the travel ICN-YUL had already commenced and coupons used. I received a notice for a schedule change on my return and called to make changes.
In the end, I was able to mix OW carriers (QR, CX) for my return, but it was very difficult to find seats as compared to *A option. I also did not want to fly BA, IB, or AY due to heavy fuel surcharges, which restricted seat availability.
Here's the routing:
YUL-DOH-PVG//(overnight)-HKG-ICN
QR to PVG and CX to ICN.
Will be very interesting to try QR for the first time, but I miss *A already. Anyway, I am happy to inform you that it is indeed possible to change *A award into OW award even after the travel commended (IF there are schedule changes in the original itinerary).