Ocean freight is the transport of goods by sea in containers or bulk, the most widely used method for moving large volumes of cargo in international trade because of its low cost per unit.
Ocean freight, also called sea freight, is the transport of goods by sea — usually in shipping containers, and sometimes as bulk or break-bulk cargo. It is the backbone of international trade, moving the large majority of the world's traded goods because it offers the lowest cost per unit for large volumes.
Ocean freight is one of the two main international transport modes; the other is air freight, which is faster but far more expensive.
In ocean freight, goods are loaded into containers (or handled as bulk) and carried by cargo ships between seaports. A freight forwarder typically arranges the booking, documentation and coordination, while the carrier issues a Bill of Lading as the transport document. Ocean freight suits almost every category of goods, from raw materials to finished products.
Ocean freight is shipped in two main ways. FCL (Full Container Load) gives one shipper exclusive use of a container, which is efficient for larger volumes. LCL (Less than Container Load) consolidates cargo from several shippers into one container, so each pays only for the space used — ideal for smaller shipments.
The main trade-off is speed: ocean freight is slower than air, with transit times ranging from days to several weeks depending on the route, plus time for handling and customs clearance. Buyers should also plan for port charges and avoid demurrage and detention by clearing and collecting cargo promptly.
Ocean freight wins on cost and capacity but is slower; air freight wins on speed but is far more expensive and limited by weight and size. Most bulk B2B trade moves by sea, while air is reserved for urgent, perishable or high-value goods. The right choice depends on the shipment's size, value, and how quickly it is needed.
Ocean freight is the most widely used method of international shipping, offering low cost and high capacity for large volumes at the expense of speed. Understanding FCL and LCL options, planning for transit time and port charges, and weighing sea against air freight helps importers and exporters move goods efficiently and economically.