usps flat rate shipping times

usps flat rate shipping times USPS flat rate shipping offers predictable shipping costs for packages of various sizes, with delivery times depending on the service chosen. For domestic shipments, USPS Priority Mail Flat Rate typically delivers within 1-3 business days, while Priority Mail Express Flat Rate offers overnight delivery. For international shipments, USPS Flat Rate services may take 6-10 business days for Priority Mail International or 3-5 business days for Priority Mail Express International, depending on the destination country.