While USPS typically offers the cheapest options, UPS and FedEx prices are competitive. All three carriers offer flat-rate shipping options. USPS cannot ship packages weighing more than 70 pounds.

United Parcel Service (NYSE:UPS) announced on Tuesday the expansion of its shipping portfolio with two new ground services.

A larger Flat Rate Box means a higher rate increase. ships at the lowest cost compared to FedEx and UPS each and every time. USPS's shipping rates tend to equal those of UPS and FedEx Ground as the ...