usps how long does priority mail take generally takes 1 to 3 business days for domestic deliveries within the United States. Priority Mail is one of the fastest services offered by USPS, ensuring that packages arrive quickly and reliably. The delivery time depends on the origin and destination of the package, and USPS offers a flat rate for Priority Mail, regardless of weight (up to a certain limit) and distance. Customers can also add tracking and delivery confirmation for an additional level of assurance. Priority Mail is a popular choice for businesses and individuals who need to send items quickly but don’t want to pay for expedited services like Priority Mail Express. It also offers free packaging materials, which helps reduce shipping costs for small businesses.