If you ship from China to the US, the core decision is still ocean or air, and the numbers in 2026 make the trade-off sharper than before. Rates moved, transit shifted, and the end of de minimis changed how the buyer experiences the delivery. Here is the practical picture as the market stands, so you can set the split on data rather than habit, because the habit that worked in 2024 is the one losing money in 2026.
Ocean transit from major Chinese ports to the US West Coast runs about 18 to 25 days on the water, with another several days for clearance and delivery. To the East Coast, add the Panama routing or a rail leg across the country, pushing total door-to-door closer to 35 to 45 days. Rates move with the season. They sit lower in quiet months and climb through the fourth quarter as peak allocations tighten. A West Coast box that costs one number in August can cost a third more by November, and the increase is not negotiable once the ship is full and the slot is gone.
Express and air freight cut that to roughly 3 to 7 days door to door, including clearance on a DDP lane. The cost per kilo is several times ocean, but for urgent stock, samples, or high-value goods the speed protects the sale. Many sellers run a base of ocean for planned inventory and keep air for exceptions. The ratio depends on margin: if air freight is under about 15 to 20 percent of the retail value, air often pays for itself by preventing a stockout that costs far more than the freight. The stockout is the hidden cost that never appears on the rate sheet.
The de minimis change reshaped the calculus. With every US parcel now needing a formal entry, the old cheap-postal trick is gone, so DDP has become the standard way to keep the buyer experience clean. Under DDP the forwarder pre-pays duty, files the entry, and the customer pays once at checkout. The quote should show duty up front so the product page price is honest, not a teaser that breaks at delivery. A duty surprise is the fastest way to lose a repeat customer, and repeat customers are the ones who carry the business through the slow months.
Rate timing matters. Ocean carriers announce General Rate Increases at set points in the year, and booking early often locks a lower number. Waiting for a spot dip in peak season is a gamble that usually loses. For air, capacity tightens around the same holidays, so express rates also rise in Q4. The earlier you commit, the better the number and the firmer the space, because both modes ration capacity by commitment, not by request, and the request that arrives late is the one that gets declined.
Transit reliability is the quiet factor. Ocean schedules slipped through 2025 and 2026 as carriers adjusted networks around disrupted corridors, so build a buffer of one to two weeks between arrival and the date you actually need stock. A plan with no slack is a plan that breaks in peak, when a single missed connection cascades through your whole replenishment and leaves the shelf empty for the week that matters most.
For most sellers the answer is a mix, not a single mode. Steady, forecastable volume goes ocean DDP. Fast or unpredictable demand goes air DDP. The split is different per product, and it should be reviewed each quarter as rates move. A SKU that fits ocean in Q1 may need air in Q4, and the sellers who review win the season while the ones who set it once watch margin leak.
A practical way to set the split is to rank your SKUs by sell-through speed and value. Fast, high-value movers earn air budget. Slow, bulky, low-margin goods stay ocean. Mid-tier items get a hybrid: ocean base plus a small air safety net for replenishment. This keeps cost down without risking the bestsellers, which is where the revenue actually lives and where a stockout hurts most.
The mistake we see is using last year's ratio without revisiting it. Rates, surcharges, and demand all shift, and a static split quietly bleeds margin or availability. The sellers who set the mix quarterly treat freight as a managed cost, not a fixed habit, and the managed cost is the one that stays predictable when the market is not.
Three moves for your US lanes: rank SKUs by value and speed to set the ocean-air split; lock ocean space early to avoid the Q4 rate climb; and keep a standing air option for replenishment so a hot SKU never goes dark. Those three turn a guessing game into a plan.
At Yitong we quote China to US lane by lane with duty included, and we hold both ocean and express capacity through peak. Send us your product weights, values, and target arrival dates and we will show you the ocean-air split that keeps cost and speed in balance, with a rate validity window so the number does not drift under you between quote and booking.
