Sea freight vs air freight from China to Australia: cost and when to use each
20 September 2026 · 9 min read
Why the freight choice is a real money decision
Freight is not an afterthought on an import order, it is a line item that can swing the landed cost by thousands of dollars. The choice of sea freight vs air freight from China to Australia comes down to a trade-off between cost and speed. Sea freight is cheap and slow. Air freight is fast and expensive, often 8 to 15 times the cost per kilogram. Choosing wrong means either paying a premium you did not need to, or missing a lock-up date because a container is still weeks away.
This guide covers the real cost ranges in AUD, how each option is priced, a worked landed-cost comparison on the same order, and when air freight genuinely earns its premium.
Sea freight vs air freight: the core trade-off
The decision comes down to weight, volume, value, and how much time you have. Sea freight wins on almost everything heavy or bulky. Air freight wins when a small, high-value, or urgent shipment cannot wait for a vessel.
| Factor | Sea freight | Air freight |
|---|---|---|
| Transit (port to port) | 18 to 30 days | 2 to 5 days |
| Door to door (incl. clearance) | 30 to 45 days | 4 to 8 days |
| Priced on | Container (FCL) or cubic metre (LCL) | Chargeable weight (actual or volumetric) |
| Cost per kg (indicative) | roughly $0.30 to $1 | roughly $6 to $12 |
| Best for | Furniture, stone, tiles, windows, flooring, full house sets | Samples, urgent parts, small high-value items |
| Volumetric divisor | n/a (volume priced separately) | 1:6000 (1 cbm treated as 167kg) |
The single biggest driver is density. A pallet of tiles or a crate of stone is heavy and cheap to send by sea per kilogram. The same weight sent by air is punishing. A carton of light, bulky product (think lampshades or cushions) is the opposite: it weighs little but takes up space, so air freight charges it on volumetric weight, not actual weight.
What air freight actually costs from China to Australia
Air freight is priced on chargeable weight, which is the greater of the actual weight and the volumetric weight. Airlines calculate volumetric weight by dividing the shipment volume in cubic centimetres by 6000, so one cubic metre is treated as 167kg. If your goods are light and bulky, you pay on the volume.
Indicative air freight rates from major Chinese airports to Australian capitals commonly run $6 to $12 per kilogram of chargeable weight for general cargo, with a minimum charge that makes very small shipments expensive per kilo. On top of the base rate you have fuel and security surcharges, airport handling, and Australian customs clearance and biosecurity. Express courier services (the door to door integrators) cost more again but bundle clearance and delivery.
Air freight also still attracts duty and GST on arrival, the same as sea freight. The freight and insurance cost is part of the value GST is calculated on, so a high air freight bill also lifts the GST. Confirm current rates and surcharges with your freight forwarder, because air rates move week to week with capacity and fuel.
What sea freight costs, in brief
Sea freight is priced two ways. Full container load (FCL) is a flat rate for a whole 20ft or 40ft container, which is the cheapest option per unit once you have enough to fill or nearly fill a box. Less than container load (LCL) is for smaller shipments, priced per cubic metre (or per tonne, whichever is greater) and consolidated with other importers' goods.
As a rule of thumb, once a shipment passes roughly 12 to 15 cubic metres, a 20ft FCL usually beats LCL on a per cubic metre basis. Below that, LCL is the sensible choice. For the current FCL and LCL rate ranges, port pairs, and what drives the price, see our container shipping cost guide. For how the full timeline stacks up from production to site, see how long shipping from China to Australia takes.
Worked comparison: the same order by sea and by air
Take a 300kg order occupying 2 cubic metres, say a batch of tapware and light fittings for a project, with a factory value of $6,000. The volumetric weight for air is 2 times 167, which is 334kg, higher than the actual 300kg, so air charges on 334kg.
| Item | Sea (LCL) | Air freight |
|---|---|---|
| Factory value (FOB) | $6,000 | $6,000 |
| Freight | $300 to $500 | $2,000 to $4,000 |
| Duty (confirm with broker) | confirm with broker | confirm with broker |
| GST (10% of value plus freight plus duty) | roughly $650 | roughly $850 to $1,050 |
| Clearance and delivery | $400 to $700 | bundled or $300 to $600 |
| Total landed (indicative) | roughly $7,350 to $7,850 | roughly $9,150 to $11,650 |
| Time to site | 30 to 45 days | 4 to 8 days |
The air option costs roughly $2,000 to $4,000 more on a $6,000 order to save around a month. On a heavier order the gap widens sharply, which is why full house sets of windows, stone, and flooring almost always travel by sea. Duty depends on the tariff classification and ChAFTA eligibility, so confirm it with your customs broker rather than assuming a rate. For how duty and GST are calculated, see our import duty and GST guide.
When air freight is worth the premium
Air freight earns its cost in a few specific situations, not as a default.
- Samples and pre-production approvals. Getting a physical sample, a finish swatch, or a first-off unit to Australia in days rather than weeks can save far more than the freight by catching a problem before the full order runs.
- Small, high-value items where freight is a small share of value. For a compact, expensive item, the air premium can be a modest percentage of the total, and speed matters.
- Urgent replacements or a shortfall. A single missing or damaged item holding up a trade is often worth air freighting rather than delaying the job.
- A genuine lock-up or handover deadline. When a slipped vessel would blow a critical date and the cost of delay exceeds the air premium, pay for speed.
For most bulky building materials, the answer is sea freight, planned early. Air freight is the tool you reach for on the small, urgent, or high-value end.
Common mistakes when choosing freight
Air freighting heavy goods to save time. Sending tiles, stone, or a full window set by air can cost more in freight than the goods are worth. Plan the sea shipment early instead.
Forgetting volumetric weight. Light, bulky cartons are charged on volume by air. A shipment that weighs 100kg can be billed as 250kg or more. Check the volumetric weight before you assume air is cheap.
Ignoring the GST lift on air freight. GST is calculated on the value plus freight plus duty, so a big air freight bill also increases the GST payable. It is not just the freight line that moves.
Choosing LCL when you nearly fill a container. If you are close to a full container, an FCL rate is often cheaper per cubic metre than LCL. Do the sum before booking.
Leaving the sea booking too late, then paying for air. Most air freight decisions are really planning failures. Order early, build the sea transit into your program, and keep air for genuine surprises.
Frequently asked questions
Is air freight or sea freight cheaper from China to Australia? Sea freight is far cheaper for anything heavy or bulky, often 8 to 15 times cheaper per kilogram than air. Air freight only makes sense for small, urgent, or high-value shipments where speed is worth the premium.
How long does air freight from China to Australia take? Airport to airport is typically 2 to 5 days, and 4 to 8 days door to door once you add pickup, clearance, and delivery. Sea freight runs 30 to 45 days door to door.
Do I pay duty and GST on air freight? Yes. Duty and GST apply the same way regardless of how goods travel. Because GST is calculated on the value plus freight plus duty, a higher air freight cost also increases the GST.
What is volumetric weight? Air freight charges on the greater of actual weight and volumetric weight. Volumetric weight is the shipment volume in cubic centimetres divided by 6000, so one cubic metre counts as 167kg. Light, bulky goods are charged on volume.
Threadline plans freight into every order from the start, books sea freight early to keep costs down, and uses air only where it genuinely pays. See the windows and doors category or start a request with your order size and timeline.
Ready to get a quote?
Submit your sourcing request and we'll come back with factory pricing, lead times, and a landed cost, usually within 48 hours.