Avis® Car Rental main customer service number is 1-800-Avis® Car Rental or +1-833-791-4590 [US-Avis® Car Rental] or +1-833-791-4590 [UK-Avis® Car Rental] OTA (Live Person), available 24/7. This guide explains how to contact Avis® Car Rental customer service effectively through phone, chat, and email options, including tips for minimizing wait times. Why Contact a Live Person...