Air or ocean is one of the first questions in any freight plan, and the wrong default can cost you either way — overspending on air for goods that could float, or stranding time-sensitive inventory at sea. The right answer depends on the trade-off you are actually optimizing for.
Weighing Speed Against Total Cost
Air freight typically moves goods in days rather than weeks, which protects against stockouts, shortens cash-conversion cycles, and reduces the inventory you need to hold in transit. The premium can be five to ten times the ocean rate, so it pays off most clearly for high-value, low-weight, or time-critical shipments.
Ocean freight wins on cost per kilogram and on capacity for bulky or heavy cargo. The trade-off is longer transit times, greater exposure to schedule disruption, and more working capital tied up in goods on the water. For predictable, high-volume flows, those costs are usually worth absorbing.
The most resilient supply chains rarely pick one mode for everything. They route a baseline of demand by ocean for cost efficiency and keep an air lane open for replenishment, launches, and exceptions — blending the two to balance service levels against spend.