Welcome aboard High C's
I guess it depends on how big a hurry you are. You can cut across to the Cdn side of the lake and parallel the shipping
channels straight down the lake to TO about 144 nautical miles. You'll have to watch the weather
though. A lot of people leaving the Erie Canal at Oswego will scoot along the south shore (Sackett's to Niagara on the Lake 150 nautical miles) of the lake and make a straight crossing to TO from Niagara on the Lake about 22 nautical miles. The other way, if you're not in a hurry head
up to Kingston and follow the north shore and Bay of Quinte, Murray Canal and again follow the shore (with plenty of places to stop) to TO about 170 nautical miles or so.
A few options to explore. Good luck.