us postal priority mail delivery time typically takes 1-3 business days, depending on the distance between the origin and destination. USPS Priority Mail is one of the fastest standard services offered by the postal service, making it a popular choice for those needing reliable and timely delivery. Priority Mail includes a free tracking number, and in some cases, USPS offers delivery confirmation and insurance for valuable or fragile items. Delivery times may be extended during holidays or periods of high shipping volume.