These zones are dynamic, as they differ based on the location you ship from. Shipping Zoneĥ0-mile radius covering the continental US, Alaska, Hawaii, and US Territories such as Puerto Rico and the Virgin Islands.įreely Associated States that are mostly based in the Pacific Ocean, such as Guam, Northern Mariana Islands, and Republic of the Marshall Islands. Here are the shipping zones as defined by USPS. When we are determining the postage rates of the following USPS domestic shipping services, we consider the weight of the shipment and the distance it travels. To understand how the shipping cost is calculated, you need to have a better understanding of USPS zones. To Conclude: USPS Priority Mail vs USPS Flat Rates.

When to use the USPS Large Flat Rate Box.

USPS Priority Mail vs USPS Large Flat Rate Box.

When to use the USPS Medium Flat Rate Box.

USPS Priority Mail vs USPS Medium Flat Rate Box.When is USPS Small Flat Rate Box a better choice.USPS Priority Mail vs USPS Small Flat Rate Box.

Priority mail flat rate cost