Kayak is a great source that offers you the ability to search hundreds of travel sites at once. Gone are the days when you needed to look at five different sites and hope that you were finding the best deal possible. Simply choose the Cars menu item, enter your destination, and you will immediately be presented with car price and size options, number of passenger options, preferred rental agency options, and more. You can set everything up online, including whether you prefer to have your car waiting for you at the terminal, or you prefer to take the shuttle. With so many options available at your fingertips, you will find that renting through Kayak is a breeze.