In this first comparison, I looked at shipping rates for 1, 3, and 5-pound packages that fit in the 8 11/16 inch by 5 7/16 inch by 1 3/4 inch small flat rate … Our Express Mail ® Flat-Rate … These shipping rates are tiered, based on the total weight of your product selection.For example, any product combination under 2,000 lbs. USPS Flat Rate Shipping Delivery Times. How long does Standard Flat Rate Shipping take? My dad ordered a pc game on ebay using flat rate shipping. For domestic service, the delivery timeframe is usually between 1 to 3 business days. Get a USPS flat rate box. There are small, medium, and large flat rate boxes; And the bigger the box, the higher the shipping … For our customers that require freight carrier shipments, PSC now offers Flat Rate Shipping for select locations in the Northeastern United States. Prices vary by product, as shown in the table below. He ordered it on Saturday, July 29th. Below are several price comparisons, looking at USPS flat rate shipping versus published United Parcel Service and FedEx retail rates. will ship for a low rate … Instead of packing items in your own box, choose from a variety of flat rate boxes at your local USPS office. How long would it take to get to a suburb … If It Fits, It Ships ®.Priority Mail ® service offers a variety of Flat-Rate Boxes and Envelopes that ship for the same price to any domestic address, regardless of how much they weigh or how far they’re going. It sure does! Small flat rate boxes vs. ground shipping. With the USPS international flat rate service, the delivery timeframe is quoted as 6 to 10 business days. Does USPS Flat Rate Include International? 1. Flat-Rate Package Options.