The cost of renting a car in Ohio depends on the type of car you are renting and the season (high or low) when you are making the reservation. Economy and compact cars are the cheapest to rent, whereas luxury, convertibles and bigger cars like minivans are comparatively expensive to rent. There are some other things that can add to the cost of the rental, like the age of the driver and whether you are taking a one-way trip or not (as it comes with an extra fee).