Every exporter eventually faces the same question: does this shipment go by sea or by air? The honest answer is that it depends on four factors — cost per kilogram, transit time, cargo characteristics and how firm your delivery date really is.
When Sea Freight Makes Sense
Sea freight remains the default for high-volume, low-urgency cargo. If your shipment can tolerate a three to six week transit window and cost per unit matters more than speed, sea freight — whether full-container or LCL — will almost always be cheaper per kilogram than air.
When Air Freight Makes Sense
Air freight earns its premium when a shipment is time-critical, high-value relative to its weight, or replacing lost sales matters more than freight cost. Sample shipments, urgent replenishment orders and perishable or high-value goods are the clearest cases.
A Third Option: Splitting the Shipment
Many of our clients combine modes on a single order — air-freighting a partial shipment to cover an urgent portion of demand while the bulk of the order moves by sea at a lower cost. This is one of the reasons a coordinated freight desk matters: it can plan both legs as one shipment plan rather than two disconnected bookings.
What To Check Before You Decide
Beyond mode, confirm your Incoterms, whether cargo insurance is included, and that your export documentation is ready before booking — a booking without complete paperwork is one of the most common causes of delay at origin, regardless of which mode you choose.