Most of the time, you can get a better rate on an international car rental by reserving a car in advance before you leave the States. But oftentimes you’ll find much better rates from the same rental company once you get to your destination. The best way to get the better rate is to reserve a car in advance in your name, then have your travel companion check for prices when you arrive in your destination. If the rate they are offered is better, use that rate and cancel the reservation under your name. This way you cover your bases and can drive away with the best deal. Just make sure that you are driving on the correct side of the road once you hop in a car in a foreign country.