Here are the USPS Delivery Standard times for their services:
1-3 Business Days
Get more for your money with fast domestic service in 1, 2, or 3 business days3 based on where your package starts and where it’s being sent.
Priority Mail Express®:
Our fastest domestic service, with limited exceptions, available 365 days a year, with a money-back guarantee*. and overnight scheduled delivery to most U.S. addresses, including PO Boxes™
*over-night guarantee is not for all addresses, please check with us if you have any concerns*
Priority Mail Express International®:
3-5 Business Days
Affordable and fast international delivery to more than 180 countries, plus date certain service delivery.