
It usually delivers packages and envelopes in 1-3 days. Whereas, Priority Mail is a standard delivery service by USPS.

Flat rate for this service starts at $24.70 with 3 box types meant for different types of items. The Express service is available to most US addresses with a few exceptions. Priority Mail Express is a guaranteed delivery service which offers overnight scheduled delivery by 10:30 am. Priority Mail Express & Priority Mail Flat Rateįlat rate boxes are available with both Priority Mail Express and Priority Mail services from USPS.

USPS Flat Rate Boxes with WooCommerce Shipping Plugins.EasyPost vs - Priority Mail® Flat Rate Box Charges.Priority Mail Express & Priority Mail Flat Rate.
