Looking for something that won't cost an arm and a leg? Enter the economy car. This small vehicle is the most popular type of rental car in Washington (and ideal if you're on a tight budget). Fuel up the tank on the cheap and you'll be zooming around cities like Seattle and Spokane in no time.That said, Washington is renowned for its rocky coastlines, mountains, and forests. It'd be a shame not to escape the city to tour those glorious sights. If that sounds good to you, reserve an SUV or a full-size vehicle. Even if you don't have plans to venture off the beaten track, you'll enjoy the extra legroom.