Fin 946 is scheduled for (according to AC app):

AC 2324 Dec 21 16:00 ICN - YVR 09:00 (ferry flight)
AC 312 Dec 21 12:00 YVR - YUL 19:49 (seat map showing SQ config)
AC 98 Dec 21 21:30 YUL - BOG 03:55+1 (seat map showing SQ config)

If the assignments don't change, in order to make those flights it'd have to either depart QPG for ICN in the next couple of hours, or alternatively they can fly QPG-ICN (a 6.5-hour flight) the morning of Dec 21, departing at most 17 hours from now, and have an alternate crew doing the ICN-YVR leg. When Fin 931 ferried HKG-ICN-YVR earlier this month there was a 25 hour layover at ICN.