To compare different car rental prices, visit a travel site such as Orbitz.com, Kayak.com or Expedia.com, click the Cars tab on the home page, enter rental car pick-up and drop-off locations, dates and times, and click Search. Orbitz offers a matrix that displays the different rental companies' weekly prices for each car type and highlights the cheapest rental prices in green. Kayak displays a similar table when you click Rental Agency/Car Type Matrix above the search results.
Orbitz and Kayak's car rental price comparison tables compare cars in categories such as economy, standard or luxury. To find more detailed information about the vehicles, scroll through the list of available rentals to view the typical car brands and models that the different companies rent in each category. To tailor a search, specify the desired car type, and apply filters such as air conditioning or automatic transmission.
Most rental companies include unlimited mileage in the prices they quote, but check for additional charges for trips that exceed a set mileage, as these can increase the overall cost of a rental. Orbitz and Expedia offer free cancellation on rentals booked through their sites, enabling you to lock in the price at the time of booking and cancel at no cost.