ups ground vs usps UPS Ground and USPS each offer distinct benefits depending on the type of shipment. UPS Ground is ideal for heavier packages and offers more predictable delivery times, typically ranging from 1 to 5 business days. It is often more reliable for larger and heavier shipments. USPS, on the other hand, offers more affordable options for lighter packages through services like First Class and Priority Mail. While USPS can be cost-effective, especially for small packages, UPS Ground provides better service for businesses shipping heavier items.