Air Canada flies out of Winnipeg on Saturdays end of November to end of Mach. It's a late flight leaving Winnipeg after 1PM. The return flight from MBJ is 7PM and doesn't land in Winnipeg until 1:30AM, yuk!
You can fly West Jet any week day via Toronto. The 5AM flight from Winnipeg get you to Toronto in time from the MBJ departure.