In essence, there is only one main difference between flat rate and Priority Mail: the price. All of your shipments are shipped ... There will be a $1 increase in rates for the Large Flat Rate Box. up ...
USPS is increasing rates in parcel delivery services, effective this week. Here's what to know about the cost to ship your packages.
The U.S. Postal Service launched two new Priority Mail and Priority Mail Express stamps today at the Big Sky, Montana, Post ...