Sea vs Air vs Rail vs Express: Shipping from China Compared

Once your goods are packed, the shipping mode decides two things you care about most: how long your cash is tied up in transit and how much each unit costs to land. The four realistic options from China are ocean freight, air freight, express courier and, for Europe, rail. This guide compares them on transit time, relative cost and billing rules, then gives you a table to pick one.

The four modes at a glance#

Each mode trades speed for cost, and the gap between them is large. Treat the times below as typical ranges from published carrier and marketplace guidance, not guarantees; weather, port congestion, customs holds and peak season all stretch them.

Sources: China–US times and the weight thresholds are from Freightos' China–US shipping guide; rail time and the rail-versus-air cost ratio are from DHL Freight's China–Europe overview; the volumetric ratios are from DHL Global Forwarding and DHL Express.

How chargeable weight works#

Every carrier bills on chargeable weight: the higher of the actual gross weight and the volumetric weight. Volumetric weight turns your carton volume into kilograms using a density ratio, and the ratio differs by mode.

DHL Global Forwarding publishes the standard freight ratios, with dimensions in centimeters:

1. Air freight (1:6): length × width × height ÷ 6,000 = kg per package.
2. Ocean LCL (1:1): length × width × height ÷ 1,000 = kg, so one cubic meter counts as 1,000 kg. Full containers are priced per box instead.
3. Rail (1:3): length × width × height ÷ 3,000 = kg.
4. Road: varies by carrier and region, so ask.

Express couriers use a tighter ratio. DHL Express, for example, divides by 5,000, which equals 200 kg per cubic meter, and bills whichever of the two weights is higher. Some carriers and forwarders apply different divisors on specific lanes, so read the rate sheet.

Worked example. One carton measures 60 × 40 × 40 cm and weighs 12 kg (0.096 CBM):

• Express at ÷5,000: 19.2 kg chargeable, not 12 kg
• Air freight at ÷6,000: 16 kg chargeable
• Rail at ÷3,000: 32 kg volumetric, still billed on volume
• Sea LCL: 0.096 CBM, though many LCL quotes set a minimum chargeable volume that a single carton will not reach

The lesson is that light, bulky products such as plush toys, lampshades or plastic storage are punished hardest by express and air. Dense products such as metal hardware often bill on actual weight in every mode.

Sea freight: the default for volume#

Sea freight is the cheapest way to move anything heavy or bulky, and it is the only practical option for full containers. Freightos gives about 30–40 days door to door for China to the US; the port-to-port leg is shorter, but trucking, customs and port handling at both ends add days.

You book either a shared container (LCL) or your own container (FCL). As a rule of thumb from both Maersk and Freightos, a full container starts to make sense at around 15 CBM. See LCL vs FCL for the break-even math and the extra fees LCL carries.

Ocean rates are the most volatile part of your landed cost. For context, Drewry's World Container Index on 24 September 2026 put a 40ft container at $7,838 Shanghai–Los Angeles, $10,373 Shanghai–New York and $3,485 Shanghai–Rotterdam, with the composite index at $4,468. Those are spot benchmarks, not your quote, and they move every week.

Asia–Europe transit times are also in flux. In September 2026 several major carriers began moving some Asia–Europe services back through the Suez Canal after routing them around the Cape of Good Hope, and said the change depends on Red Sea security. Ask your forwarder which routing your sailing uses, because it changes the transit time by more than a week.

Air freight: fast, but billed on space#

Air freight suits product launches, stock-outs and high-value goods where days in transit cost more than freight. Freightos gives about 8–10 days door to door for China to the US on standard air freight, and says express air services typically cut 2–3 days off that.

Air freight moves airport to airport by default. You still need export clearance in China, import customs clearance, and trucking at both ends, so ask whether a quote is door to door and whether duties are included. Batteries, magnets, liquids, powders and aerosols can be restricted or need dangerous-goods paperwork, which limits which airlines and forwarders will take them.

China–Europe rail: the middle option#

Rail only makes sense for Europe and Central Asia; there is no rail option for North America. DHL Freight gives about 10–20 days door to door between China and Germany, depending on how far inland in China the cargo starts. It also puts rail costs at about half of air freight rates.

Rail is less exposed to weather than sea and air, but it has few alternative routes, so a disruption at one border crossing can delay many trains. Rail services run both full containers and consolidated (LCL) cargo on fixed schedules. It is worth a quote when sea is too slow and air too expensive, for example a mid-season restock for a European warehouse.

Express couriers: simplest for small parcels#

Express couriers such as DHL, FedEx and UPS carry the parcel door to door and normally handle customs clearance for you. Freightos suggests allowing about three days from China to the US, though remote pickup areas and customs holds add time.

Express is usually the cheapest mode for small shipments because air freight and sea freight carry fixed charges (documentation, terminal handling, customs entry) that dominate the bill on a few cartons. Freightos' rule of thumb is express up to about 150 kg, air freight between about 150 kg and 500 kg, and sea above about 500 kg. Test that against real quotes, especially for bulky goods where the ÷5,000 divisor inflates express costs quickly.

How to choose: a decision checklist#

Work through these questions in order and stop at the first clear answer.

1. Is it a sample or a few cartons? Use express.
2. Will a stock-out cost more than the freight premium? Use air freight, or express if it is under roughly 150 kg.
3. Is it going to Europe and too urgent for sea? Get a rail quote alongside air.
4. Is it over roughly 500 kg or several CBM? Use sea freight: LCL below about 15 CBM, FCL above.
5. Is the product light but bulky? Calculate chargeable weight for each mode before deciding; the ranking can change.
6. Does it contain batteries, liquids or magnets? Confirm the carrier accepts it before you book.

Whatever you choose, compare quotes on the same basis: same Incoterm, same pickup and delivery points, and the same inclusions for customs clearance and duties. The EXW vs FOB vs DDP guide explains which costs sit with you under each term. Then add freight to duties and fees in a landed cost calculation so you are comparing total cost per unit, not just freight. If you sell on Amazon, see shipping from China to Amazon FBA for the extra carton and labeling rules.