which shipping company is cheapest The cheapest shipping company depends on the size, weight, and destination of your package. For domestic shipments, USPS is often the most affordable option, especially for smaller packages and letters. For larger items, FedEx and UPS may offer competitive rates, particularly with ground services. Internationally, the cheapest carrier may vary based on the country of origin and destination. Comparing shipping rates using online calculators from USPS, UPS, FedEx, and DHL will help determine the most cost-effective option for your shipment.