Usps Rates 2024 Chart Ground Shipping. Priority mail, including priority mail flat rate shipping products, has fast shipping times (1, 2, or 3 business days) with flexible prices. Usps has an international delivery service to fit your needs.

This meant the cost to ship these packages might have increased slightly depending. On september 16th, usps adjusted priority mail and ground advantage rates, resulting in increased shipping and mailing costs for certain zip codes.