BC Ferry fare savings can be had on specific sailings (both directions) between Vancouver and Vancouver Island at the Swartz Bay, the Duke Point, Departure Bay and the Tsawwassen terminals.
Reservations through 1-800-223-3779 must be made in advance of a chosen sailing as the discounted fare can not be bought at the terminals.
The BC Ferry fare savings including reservation costs, start at $49 for a standard car & driver.
If made more than an hr prior to sailing, changes to a reservation are possible for a $5 charge.