Originally Posted by
YYT82
If it's not allowed in the YVR-HKG fare routing rules (YVR-YYZ-HKG is not allowed) and there are no severe weather advisory or IRROPS, your chances of doing this is non-existent, unless you want to pay extra (because it will most likely be send to ticketing/rates desk for validation).
It's an SDC, not a reissue of the ticket.
Some more extreme examples I've seen done:
YYZ-YVR -> YYZ-SFO-YVR
YVR-SFO -> YVR-YYZ-SFO