How long is the flight from Toronto Canada to Sudbury Ontario Canada?

Maybe an hour to 2 hours max. It's a 4 hour drive, and maybe even shorter by GO train alone, seeing as they are just 2 cities in the same province.

Travelling by air is obviously faster than by land, so if it takes 4 hours by road (traffic, etc.), and less than 4 hours by rail (no need to stop at lights, etc.)...it shoudln't take more than 3 hours max. Though most people just opt to drive or take the train in this case. It's a lot cheaper.