

Priority Mail Cubic will likely be your best alternative.

The Postal Service is efforting to simplify Priority Mail pricing and will accept regional rate boxes if you have them. USPS Priority Mail Regional Rate has been discontinued as of January 2023. Learn more about USPS Priority Mail Flat Rate. Keep in mind you must use the USPS Priority Mail Flat Rate envelopes or boxes in order to ship with this service level. territories, come with free tracking, and include $100 in insurance. USPS Priority Mail Flat Rate packages are generally delivered within 1-3 business days within the U.S.

