Carvana, the largest online used auto retailer in the US, has launched a same-day vehicle delivery service in Arizona. The service will be rolled out in select markets across the country in the coming months. The company's integrated online auto retail experience includes financing, insurance, warranty and service, as well as selling or trading in a vehicle. Carvana's new same day process allows customers to purchase a vehicle, get pre-qualified and approved online in as little as two to three minutes, and have the vehicle delivered within hours.