UPS delivery to residential addresses typically occurs between 9 AM and 7 PM, with some deliveries occasionally arriving later, especially during busy periods. Drivers often have shifts scheduled through 9 PM and may deliver as late as 9 PM or even later under certain conditions. For business addresses, deliveries usually happen during regular business hours, generally before 5 PM. Special services like UPS Next Day Air have guaranteed delivery times by morning or early afternoon of the next business day. Delivery times can be affected by factors such as location, weather, and holiday seasons, potentially causing later deliveries.