Cossack,
Actually, I was referring to the difference in flight times between the eastward and westward legs, 2.5 hrs, which seems unusually high to me.
In view of all these times, the scheduled 13 hrs for YYZ-DEL seems optimistic to me, but I think my calculations are correct. Dp YYZ 1715 (local) Ar DEL 1645 (local) and 10.5 hrs time difference between the two cities. Airlines, like Air Canada, that don't show flight duration prominently in their timetables I find irritating.
Rockhound