I saw this tip originally on BwanaBrown's page and later saw it written up in both the guidebooks as a cheap way to get a great view of Quebec City from the St. Lawrence River. The round trip fare was $5.20 CAD, you can get off at Levis or stay on the ferry and come back. If you have more time than us, you might give it a shot both in the daytime and the evening which is what the guidebook suggests.
Ferries run every 1/2 hour or so during peak hours, the trip takes about a 1/2 hour round trip. Check the attached website for an updated schedule
If you want to get a beautiful view of Quebec City from a different perspective, this is a great way to do it. The Chateau Frontenac stands out amongst the lush greenery and sparkling blue water. For $5 Cdn, hop onto the Quebec-Levis ferry for a short trip of about 20 minutes from shore to shore. You buy tickets on shore a short distance from the ticket office and then wait your turn. The line was quite long when we went in the afternoon. I think this is a very nice way to spend a bit of down time and to see the city from a gorgeous angle, without having to pay $40 for one of the longer, fancier cruises.
The ferry runs about every half hour from 6am to 6pm.
The ferry from Quebec crosses the St Laurent to Levis, and is a great way to relax and take in the view of Quevec, with the Chateau standing proudly at the top.
We didn't get off in Levis as i dont think there is much to see there, but instead stayed on the boat for the return trip.
It was very peaceful and calm and provided some great photo opportunities :)
For the best view on the breathtaking panorama of Québec City you should take the ferry to Lévis. It leaves from the lower old town every 30 minutes. A 10-minute ride takes you across St. Lawrence River and all the while you can enjoy magnificent vistas on the city and its most prominent landmark, Château Frontenac.
The ferry is not expensive (roughly $1.50 if I remember correctly) and you shouldn't miss it.
The Québec/Lévis Ferry is the best way to view the city and have a feel for the area. Instead of viewing the city from within, we indulge it its beauty from the Saint-Laurent