The cheapest freight method typically depends on the type of goods, their weight, volume, and the distance they need to travel. Generally, ocean freight is considered the most cost-effective option for large shipments that are not time-sensitive, as it offers lower rates per cubic meter and can accommodate larger volumes over long distances. Rail and trucking are often more affordable for land transport, especially for medium-sized shipments. Air freight, while fastest, is usually the most expensive. However, LTL (Less Than Truckload) shipping can be a cost-effective solution for smaller shipments, sharing the transportation cost with other goods.