priority mail usps shipping time typically ranges from 1 to 3 business days within the U.S., depending on the origin and destination. USPS Priority Mail is a reliable and faster option compared to standard ground services, providing timely delivery with tracking included. For international shipments, Priority Mail can take 6 to 10 business days, with varying times based on the destination country. It’s often used for shipments that require a balance between cost and delivery speed, offering a quicker alternative to First-Class Mail.