Plans flexible? Avoid the underage surcharge & one way fee! How? Relocation car rentals. Sometimes, car rental agencies need to move a car from one branch to another. The agency sets the timeframe, relocation cities and cost (usually $0-5/day). You choose an itinerary that works for you and reach out to them. Sites like Transfercar and imoova.com act as an intermediary between you and the car rental agency. Happy driving!