which is the cheapest way to ship a package depends on factors such as the size, weight, and destination of the package. For small, lightweight packages, USPS First Class Mail is often the most affordable option, while larger or heavier packages might be cheaper with FedEx Ground or UPS Ground services. Using flat-rate boxes from USPS can also offer savings for heavier items that fit within the specified dimensions. To determine the cheapest shipping option, it’s essential to compare prices across different carriers using online shipping calculators or tools.