when does usps stop delivering

The United States Postal Service (USPS) typically stops delivering mail by around 5:00 PM local time on most days. However, deliveries can sometimes extend until 8:00 PM during busy seasons or due to delays such as traffic or weather. While the official delivery window is generally from 8:00 AM to 5:00 PM, it is not uncommon for mail carriers to deliver later in the evening, especially during peak times or holidays. On Sundays, USPS delivery is generally limited to Priority Mail Express and Amazon packages. For Priority Mail Express, deliveries are usually made by 10:30 AM, and USPS guarantees delivery by 6:00 PM or 6:30 PM latest. If the package is not delivered by then, customers are eligible for a refund. Amazon packages may be delivered as late as 8:00 PM to 10:00 PM on Sundays. Therefore, USPS effectively stops regular mail delivery by 5:00 PM on most days, but with some exceptions for later deliveries during busy periods and Sunday deliveries primarily for expedited services.