usps priority mail fee is the cost associated with one of the U.S. Postal Service’s most popular shipping services. Fees vary based on package weight, dimensions, and destination but typically include tracking and insurance. USPS Priority Mail is ideal for fast, affordable domestic shipping, usually delivering within 1 to 3 business days. Flat Rate options offer predictable pricing for standard box sizes, regardless of weight. Understanding the USPS Priority Mail fee structure helps individuals and businesses budget accurately for shipments while optimizing delivery speed and value.