Sea freight is cheaper for heavy, bulky loads; air freight wins on speed and small, high-value goods. Here's how Perth importers decide — with a cost and time comparison.
Last updated: 22 June 2026
In short: Choose sea freight when your shipment is heavy, bulky or not time-critical — it’s far cheaper per kilo but takes roughly 18–35 days to Fremantle. Choose air freight when goods are light, high-value, or you need them fast (about 5–10 days door-to-door to Perth). The deciding factor for most Perth importers is the break-even weight: under roughly 100–150 kg, air is often competitive; above that, sea usually wins.
Sea freight moves your goods in shipping containers (or as shared LCL cargo) from Chinese ports like Shenzhen, Ningbo or Shanghai to Australian ports such as Fremantle, which serves the Perth market. Air freight flies cargo into airports like Perth (PER) far faster, but you pay for that speed.
Sea is priced mainly by volume (cubic metres / CBM) or by container; air is priced by chargeable weight — the greater of actual weight or volumetric weight. That single difference drives most of the cost gap.
| Factor | Sea freight | Air freight |
|---|---|---|
| Transit time (China → Perth) | ~18–35 days | ~5–10 days door-to-door |
| Priced by | Volume (CBM) / container | Chargeable weight (kg) |
| Best for | Heavy, bulky, low-value-per-kg | Light, urgent, high-value |
| Rough cost per kg* | Lowest at volume | Several times higher |
| Carbon footprint | Lower | Higher |
| Port/airport (WA) | Fremantle | Perth Airport (PER) |
*Rates move constantly with fuel, season and capacity — always get a live quote before committing.
Sea wins for the bread-and-butter of importing: furniture, homewares, hardware, packaging, bulk consumer goods — anything where the weight or volume is high relative to value. If you can plan ahead and don’t need stock for a few weeks, sea freight protects your margins. A full container (FCL) into Fremantle is the cheapest per unit; if you can’t fill one, shared LCL still beats air on heavier loads.
Air earns its premium when speed or weight maths is on its side: launching a product and you’ve sold out; samples and pre-production runs; small, light, high-margin items like electronics accessories or cosmetics; or seasonal stock that will miss its window by sea. Many Perth brands use a hybrid — air-freight a small first batch to start selling, then top up the bulk by sea.
Say you’re importing 200 kg of product taking up 1.2 CBM. By sea (LCL) you might pay a modest per-CBM rate plus fixed port and customs charges, landing in Fremantle in around three to four weeks. By air, you’d pay per chargeable kilo — typically several times the sea cost — but have it in Perth within about a week. If the stock isn’t urgent, sea is the clear call. If you’re out of stock and losing sales daily, the air premium can pay for itself.
To turn freight into a true landed figure, read our guide on how to calculate landed cost when importing from China to Australia, and if you’re weighing FCL against LCL, see FCL vs LCL shipping containers.
Consolidate orders so you ship fuller, plan around Chinese public holidays that spike rates, get DDP or door-to-door quotes so there are no surprises at Fremantle, and lock specs early so you’re not air-freighting fixes later. Paying suppliers correctly also avoids costly delays — see our supplier payment terms guide.
Allow roughly 18–35 days port-to-port into Fremantle, plus a few days for customs clearance and inland delivery to Perth. Add buffer around Chinese New Year and peak season.
Per kilo, yes — but for very small, light shipments the fixed costs of sea (port fees, LCL handling) can make air surprisingly competitive. Under about 100–150 kg, always price both.
It’s the greater of the actual weight and the volumetric weight (volume converted to a weight). Bulky-but-light cargo gets charged on volume, which is why air suits dense, heavy-for-size goods.
Yes, and many Perth importers do. Air-freight a small launch batch to start selling immediately, then send the bulk by sea to protect margins.
Air involves less handling and a shorter transit, which can lower damage risk, but good packaging matters most. By sea, specify protective packaging and consider FCL to reduce handling.
How Epic Sourcing helps: We’re an Australian sourcing agency with bilingual teams on the ground in China and Vietnam, offices in 5 countries, and a track record of 20,000+ products sourced for 300+ happy clients — with average savings of around 77%. We handle supplier vetting, quality control, payments and freight so you don’t carry the risk alone. Give us a bell and we’ll map out your next order.
