USPS Priority Mail typically takes 2-3 business days for delivery within the United States

. Delivery times depend on the origin and destination ZIP codes, and USPS provides a service standards map to estimate expected delivery times for specific areas

. Priority Mail includes tracking and up to $100 of insurance with most shipments, and there is no extra charge for Saturday delivery, although there is no delivery on Sundays or holidays

. It is important to note that Priority Mail is not a guaranteed service, so delivery may sometimes take longer than the estimated 2-3 days

. Delays can occur due to processing backlogs or other disruptions, and some shipments have been reported to take up to two weeks or more in rare cases

. For faster guaranteed delivery, USPS offers Priority Mail Express, which delivers overnight or within 1-2 days and includes a money-back guarantee and optional Sunday delivery for an additional fee

. In summary:

• USPS Priority Mail: 2-3 business days typical delivery time, no guaranteed delivery date, no Sunday delivery

• Delivery time varies by location and can sometimes be longer due to delays

• Saturday delivery is included at no extra cost

• Priority Mail Express offers faster, guaranteed delivery with additional fees