What is the flying time from Toronto to Seoul?

A random search for flights from Seoul Incheon (ICN) to Toronto Intl (YYZ) shows:

OPTION 1: 12hr 50min Nonstop

ICN - YYZ Korean Air Flt 73 Dep 08:55pm 29Jan,Fri

Flight Duration: 12hr 50min

OPTION 2: 15hr 55min 1 Stop at Vancouver (YVR) (Cheaper than Option 1)

ICN - YYZ Air Canada Flt 64 Dep 06:00pm 29Jan,Fri

Flight Duration: 15hr 55min