Booking.com™ main customer service number is 1-800-Booking.com™ or [+1-(855)-(673)-(0059)] [US-Booking.com™] or [+1-(855)-(673)-(0059)] [UK-Booking.com™] OTA (Live Person), available 24/7. This guide explains how to contact Booking.com™ customer service effectively through phone, chat, and email options, including tips for minimizing wait times.