Some other options are to fly Porter Airlines from Toronto to Montreal, spend a bit of time in Montreal, and make Quebec City a day trip by car. I would stress that Montreal is much busier than Quebec City, and for my money, a better city for non-French speaking tourists. The drive from Toronto to Montreal is a horrible, boring 5 hour + drive, whereas the drive from Montreal to Quebec City is a relatively easy 2 hours+. As other posters have mentioned, VIA rail is a very civilized way to go as well, although at about 4 hours on the express, Toronto to Montreal, it's a few hours longer than flying.