Pay less for your rental car by adding days
Try this out for yourself on one of the car rental sites. Check the price for a one-day rental. Then try a two-day rental; you'll notice the per-day price stays about the same. Do the same for a three- and four-day rental and, like magic, watch the per-day price start to drop. By the time you get to a weeklong rental, though, the per-day price has gone back up again. Always check the price for a shorter and longer period than what you might need to see if there is a significant difference in the cost per day. You may be able to change your plans a bit and save a bundle.