This happened to be one rare occasion where the passengers plane from Toronto returned to that airport due to mechanical problems, and the plane that would have been the alternate arrived late from Korea.
Prior to this flight the passenger received a 15% discount code which did not work when they booked, and when they called they were told to email using the online form. The response from the online form was to call. It remains resolved, a reflection of Air Canada's customer service.
Instead of arriving late Wednesday night, the passenger arrived late Thursday morning in poor condition since the altered logistics did not allow them to sleep more than 2 hours, and lost hours on the job they were flown in for.
The stopwatch measured a total time of 19 hours. Calculated travel time is 30% (value add), meaning 70% is Non Value Add time.