Air Freight vs Sea Freight: Which Should You Use for Your Production Run?

Sea freight for the bulk of the order. Air freight for the part you cannot afford to wait for.

That is the short answer, and it is right most of the time. The longer answer is where the money is, because the freight line on your quote is rarely the number that decides anything. What decides it is chargeable weight, destination charges and how much a lost month of selling actually costs you.

Here is how to run the decision properly, with the arithmetic that goes underneath it.

What is the real difference between air and sea freight?

Speed and how you get charged.

Air freight moves a shipment from China to Australia in roughly three to eight days door to door. Sea freight takes twenty to thirty-five days port to port, plus a week either side for pick-up, clearance and delivery. Call it five weeks realistically.

Air is priced on chargeable weight. Sea is priced on volume, either per cubic metre for a shared container or as a flat rate for a container of your own.

Indicative rates on the China to Australia lane in September 2026 look roughly like this. Air freight sits around USD 3.70 to 8 per kilogram of chargeable weight. Express courier is around USD 6 per kilogram. Shared container sea freight runs about USD 35 to 150 per cubic metre for the ocean leg. A 20ft container is roughly USD 2,200 to 2,600 and a 40ft is roughly USD 4,300 to 5,200.

Those rates move constantly. Treat them as a shape, not a quote.

When does air freight actually make sense?

Four situations, and only four.

• The product is small and dense. Jewellery, cosmetics, supplements, small electronics. Low volume relative to value, so the air premium stays small per unit.
• You are already late. A launch date, a stockist delivery window, a Christmas run. Air freight is expensive. Missing a season is more expensive.
• The shipment is tiny. Under about one cubic metre, shared container destination charges can make sea barely cheaper than air. Sometimes not cheaper at all.
• You are testing. First two hundred units to see if it sells before you commit five thousand to a boat.

Outside those, sea freight wins and it is not close.

How do you work out the break-even?

Compare cost per unit door to door. Not freight line against freight line.

Here is a worked example. Illustrative numbers, but the shape is real.

You have 1,000 units. Packed and palletised, the shipment is 6 cubic metres and weighs 480 kilograms.

By air: chargeable weight is not 480 kilograms. Airlines charge on volumetric weight where that is higher, and the formula is length by width by height in centimetres, divided by 6,000. Six cubic metres works out to 1,000 kilograms volumetric. So you pay for 1,000 kilograms.

• Air freight at USD 5 per kilogram: USD 5,000
• Origin charges, customs clearance and delivery: USD 800
• Total: USD 5,800. Per unit: USD 5.80

By sea, shared container:

• Ocean freight, 6 cubic metres at USD 60: USD 360
• Origin charges at the China end: USD 300
• Australian destination charges, deconsolidation and clearance: USD 1,100
• Truck to your warehouse: USD 250
• Total: USD 2,010. Per unit: USD 2.01

The gap is USD 3.79 per unit, or about USD 3,800, to save roughly four weeks.

Now look again at the sea column. The ocean freight was USD 360 of a USD 2,010 bill. The thing everyone shops on was eighteen percent of the cost.

That is the single most useful thing to understand about freight. Ocean rates are cheap and everything bolted to them is not.

Why is my air freight quote higher than the weight of my goods?

Volumetric weight. It catches people out constantly.

Air freight uses length by width by height in centimetres divided by 6,000. Express couriers usually divide by 5,000, which makes them harsher again on bulky goods.

A carton measuring 60 by 40 by 40 centimetres has a volumetric weight of 16 kilograms. If the actual contents weigh 8 kilograms, you pay for 16.

Light and bulky is the worst combination in freight. If your product is one of those, the fix is often not a cheaper forwarder. It is the carton. Two centimetres off a master carton height can change how many fit on a pallet and what you pay to move it. Ask your factory for carton dimensions and cubic metres per carton before the packaging is signed off, not after. Our guide to sourcing custom packaging overseas covers where that gets decided.

Should I use a shared container or a full container?

Shared container, usually written LCL, means your pallets travel with other people's. You pay per cubic metre and you pay a set of destination fees for having your goods separated out at the other end.

Full container, written FCL, means you pay a flat rate for the box whether you fill it or not. A 20ft container holds roughly 28 to 33 usable cubic metres.

The rule of thumb: below about 10 cubic metres, shared. Above about 15, your own container. In between, get both quoted door to door and compare.

Two things push that crossover lower in Australia than it is elsewhere. Deconsolidation fees at Australian container freight stations run high, and they are charged per shipment as much as per cubic metre. That means small shared shipments carry a disproportionate load. If you are moving 12 or 13 cubic metres and nobody has quoted you a 20ft, ask.

What is not in your freight quote

Ask for a door to door quote and ask specifically what is excluded. The line items that turn up later are usually these.

• Origin charges at the factory end, including export customs and terminal handling
• Terminal handling and port service charges in Australia
• Container freight station and deconsolidation fees on shared shipments
• Customs broker fee and the Import Processing Charge
• Biosecurity inspection, and treatment or fumigation if your goods or pallets are flagged
• Duty and GST
• Storage if the shipment sits at the port because paperwork is wrong
• Tail-lift or hand unload if your warehouse has no dock

On the tax side, shipments valued at AUD 1,000 or more need a formal import declaration. GST is 10 percent, calculated on the customs value plus duty plus transport and insurance, and it is claimable if you are registered. Duty depends entirely on your tariff classification, and many goods of Chinese origin enter Australia at zero duty under ChAFTA if you hold a valid declaration of origin from your supplier. Ask for it before the goods ship. Our piece on HS codes and import duty walks through getting the classification right.

Every one of these belongs in your landed cost per unit before you place the order, not after the invoice arrives.

Who pays for what? Check your Incoterm first

Before you compare freight quotes, know where the factory's responsibility stops.

On FOB terms the factory delivers to the port of departure and everything after that is yours. On EXW terms it is yours from the factory door, including export clearance, which is a genuine headache for a first-time importer. On DDP the supplier quotes it all delivered, which sounds easy and usually means you are paying their margin on freight without seeing it.

Comparing an FOB quote from one factory against a DDP quote from another tells you nothing. Get them onto the same basis first. We break the terms down in Incoterms explained.

The split shipment

This is the tactic most founders never get told about, and it is the one we use most.

Air a small portion of the order. Send the rest by sea.

Say you have made 2,000 units. Air 200 of them for about USD 1,200. They land in a week. You start selling, you fill pre-orders, you get product to your stockists and to the people who will photograph it. The other 1,800 come by sea and arrive five weeks later at USD 2 a unit.

Your blended freight cost barely moves. Your launch moves forward by a month.

It also de-risks the order. If something is wrong with the product, you find out from the 200 that landed early, not from a container you have already paid the balance on. That said, air freighting samples is not a substitute for checking the goods before they leave. A pre-shipment inspection still happens at the factory, before the balance payment.

Does the time of year change the answer?

Yes, and September is when it starts to matter.

Freight rates climb into the last quarter as everyone moves Christmas stock, then climb again in the weeks before Chinese New Year as factories push to ship everything before they close. Space gets tight and rates get quoted short. A rate you were given in September may not hold in November.

If your production run is landing in that window, book earlier than feels necessary and get the rate confirmed in writing with a validity date. The Chinese New Year 2027 shutdown timing sets the deadline that everything else works backwards from.

A checklist before you book

1. Get carton dimensions, cartons per pallet, total cubic metres and total gross weight from your factory in writing.
2. Work out volumetric weight so you know what air would actually cost.
3. Confirm your Incoterm and what the factory is and is not doing.
4. Get two door to door quotes, both broken into line items, both with a validity date.
5. Ask each forwarder in writing what is excluded.
6. Confirm your tariff classification and whether a declaration of origin gets you to zero duty.
7. Add freight, duty, GST and clearance to your landed cost model before you approve production.
8. Decide whether a split shipment buys you enough time to be worth the premium.

The takeaway

Freight is not a cost you shop for at the end. It is a design decision you make at the start, and it is mostly decided by the size of your carton.

Sea for the volume. Air for the urgency. Split the shipment when a month of selling is worth more than the premium, which is more often than founders expect.

Once the stock is in the country, the decisions change shape. How you warehouse it, pick it and get it to customers is a different problem with different numbers, and Kristy covers that side in shipping and fulfilment for your product business.

If you want a second set of eyes on a freight quote, a carton spec or the landed cost on your next production run, book a sourcing call. We will look at the real numbers with you.