when does the usps come When USPS comes to deliver packages depends on the specific area and route. In most locations, USPS delivers packages Monday through Saturday, with delivery times typically ranging from 9 a.m. to 5 p.m. However, delivery times can vary based on the volume of mail, the destination, and the type of service chosen. Customers can track their packages online for more accurate delivery windows and get updates on their mail’s progress.