Introduction
Choosing between sea freight and air freight is one of the most important logistics decisions for any importer. The right choice depends on your product type, order size, timeline, and budget.
Sea Freight Overview
Sea freight is the backbone of global trade, handling over 80% of international cargo by volume.
Advantages
- Lowest cost per unit for large/heavy shipments
- Handles any cargo size from small cartons (LCL) to full containers (FCL)
- Environmentally friendlier than air freight
- No restrictions on batteries, liquids, or other air-restricted goods
Disadvantages
- Slow transit times — 15–45 days depending on route
- Port congestion risks — delays at busy ports
- Minimum charges — LCL shipments have minimum CBM charges
Typical Costs (China to major destinations)
| Route | FCL 20ft | FCL 40ft | LCL per CBM |
|---|---|---|---|
| China → US West Coast | $1,500–2,500 | $2,800–4,500 | $45–80 |
| China → US East Coast | $2,500–4,000 | $4,500–7,000 | $55–95 |
| China → Europe | $1,800–3,000 | $3,200–5,500 | $50–85 |
| China → Middle East | $1,200–2,000 | $2,000–3,500 | $40–70 |
Air Freight Overview
Air freight is the fastest way to move goods internationally.
Advantages
- Speed — 3–7 days door-to-door
- Reliability — fewer delays than sea freight
- Lower insurance costs — shorter transit = less risk
- Smaller minimum shipments — as low as 1kg
Disadvantages
- High cost — 4–6x more expensive than sea freight per kg
- Weight/size limitations — aircraft cargo hold restrictions
- Cargo restrictions — batteries, liquids, and hazardous materials restricted
- Fuel surcharges — volatile pricing tied to fuel costs
Typical Costs
| Weight Range | Cost per kg |
|---|---|
| Under 100kg | $5–8/kg |
| 100–500kg | $3.50–6/kg |
| 500–1,000kg | $2.50–4.50/kg |
| Over 1,000kg | $2–3.50/kg |
Decision Framework
Use Sea Freight When:
- Order value is under $15/kg (freight cost becomes significant % of product value)
- Shipment weight is over 500kg
- You can plan 4–6 weeks ahead
- Products are bulky but not time-sensitive
Use Air Freight When:
- Order value is over $20/kg (freight cost is small % of product value)
- You need goods within 1–2 weeks
- Shipment weight is under 300kg
- Products are seasonal or time-sensitive (holiday inventory, fashion items)
Consider Express Courier (DHL/FedEx/UPS) When:
- Shipment is under 100kg
- You need delivery in 3–5 business days
- Sending samples or urgent replacement parts
Pro Tips
- Combine methods — ship bulk inventory by sea, restock urgently by air
- Plan seasonally — sea freight rates spike before Chinese New Year and in Q4
- Consolidate shipments — combining orders from multiple suppliers into one FCL saves significantly
- Consider rail freight — China-Europe rail (18–22 days) offers a middle ground on the China-Europe route
How Trade Entrust Helps
We manage logistics end-to-end:
- Freight rate negotiation with preferred carrier partnerships
- Shipment consolidation from multiple suppliers
- Real-time tracking and proactive communication
- Customs documentation preparation and clearance support