Air vs Ocean Freight From China to Amazon FBA

By Bernardo Campelo, Forbes Business Council E-Commerce Leader, Amazon SPN Certified provider, Amazon SP-API authorized partner, and Founder of PrepVia.

The air versus ocean question is usually asked as a freight question and it is really an inventory question. Ocean is priced by volume and takes weeks. Air is priced by weight and takes days. Which one wins depends on what a day of stockout costs your listing, and on whether the freight lands at a dock that can turn it into an FBA shipment fast enough to matter.

Transit, Counted Honestly

Port-to-port numbers flatter ocean freight. A container from South China to the US West Coast spends roughly two to three weeks on the water; to the East Coast through the Panama Canal, four to six. Add origin consolidation and export clearance before departure, terminal time and customs release after arrival, the drayage to the dock, the unload, and prep. Door to live FBA inventory, ocean is a five to eight week decision in normal seasons and longer in peak. Air freight door to door runs about three to eight days, and express couriers two to five, with the same prep step at the end.

The Cost Logic, Without a Rate Sheet

Rates move weekly, so the useful thing is the shape of the math. Ocean charges for space: a 40-foot container costs roughly the same whether it holds 8,000 units or 18,000, so the cost per unit falls as the container fills. Air charges for weight, actual or volumetric, so a light product pays little for the speed and a heavy one pays a lot. The crossover sits where the ocean savings per unit stop covering the cost of the weeks lost, and that depends on the third number most sellers do not compute: what a week out of stock costs the listing.

That number is not just lost sales. Amazon's low inventory level fee charges for running thin, a stockout resets sales velocity that the ranking depends on, and the Buy Box rewards in-stock consistency over price. A listing that earns 3,000 dollars a week in margin cannot save 1,500 dollars on freight by arriving two weeks late.

The Split That Keeps the Prep Window Open

The answer for most established listings is not one mode. It is a split: air the first ten to twenty percent of the order so the listing never goes dark, ocean the rest. The condition that makes the split work is a single landing point in the US. If the air slice and the ocean container both arrive at the same dock, the dock receives, counts and preps each one on arrival and feeds Amazon in sequence, with the ocean stock going into storage until the FBA plan calls for it. PrepVia's standard prep window is 24-36 hours from receiving, and the same dock builds both inbounds.

The Calendar That Decides the Mode

Two dates on the calendar force the decision. Chinese New Year shuts factories for weeks and the weeks before it are the most congested of the year on the water; our Chinese New Year 2027 plan counts backward from the shutdown. And Amazon's Q4 inbound windows close on published dates; the Q4 2026 inventory deadlines guide shows how far ahead ocean has to sail to make them. Air is what you use when the calendar has already decided against ocean.

Frequently Asked Questions

How long does ocean freight take from China to Amazon FBA?

Port to port, roughly two to three weeks to the US West Coast and four to six to the East Coast through the Panama Canal. Door to live FBA inventory adds origin consolidation, customs release, drayage, the unload and prep at a US dock, and Amazon's check-in after the inbound truck arrives. Planned honestly, ocean is a five to eight week decision in normal seasons and longer in peak.

When is air freight worth it for FBA?

When the weeks ocean adds cost more in lost margin, sales velocity and low inventory fees than the freight difference, which is common for light, high-value products with steady sales. Air also wins for the first slice of an order that would otherwise go out of stock, with the bulk following by ocean. Heavy, dense, low-margin goods almost always belong on the water.

Can I ship part by air and part by ocean to the same prep center?

Yes, and it is the setup most established listings converge on. The air slice lands first at the dock, is received and prepped, and goes to Amazon while the ocean container is still on the water. The container lands weeks later at the same dock, is counted against the packing list, and goes into storage or prep as the FBA plan calls for it. One receiving record, one dock, one plan.

Does the freight mode change what the prep center does?

The work is the same: receive, count against the packing list, inspect, label, bag, palletize, build the FBA shipment. What changes is the arrival: an ocean container comes by drayage from the port and is unloaded carton by carton; air freight arrives by truck from the airport, usually on pallets or in loose cartons. PrepVia receives both at the Miami dock and runs the same 24-36 hour standard prep window on each.