According to Trips to Discover’s analysis, National Car Rental charges the least amount of fees in proportion to the total checkout price. Image: Tripstodiscover.comNational Car Rental took the number 1 spot for best car rental company of 2023, according to a ranked list by Trips to Discover, a travel discovery platform. The company analyzed 176 mock rental car bookings at the five largest U.S. airports. For National Car Rental, an average daily cost for a rental car (AVG) is $132.37. Thrifty Car Rental takes fifth place with an average daily cost of $110.34 and an average fee percent of 17.65%.