what is priority mailing
The US Postal Serviceâs Priority Mail is a quick yet economical way to mail packages under 70 pounds within the United States. Using Priority Mail Flat Rate packages designed by USPS or your own boxes, you can ship items across the country and have them arrive in one to three days to most locations. Unlike other services, USPS doesnât add surcharges for residential delivery, fuel, Saturday delivery or delivery to out-of-the-way places.