Shipping from China to US: How Transit Time Is Calculated

A seller promises a retail buyer stock by 15 March. His forwarder quoted 18 days to Long Beach, production finishes on 1 February, and the arithmetic looked comfortable. The container is available for collection on 22 March. Nothing went badly wrong. The order waited nine days for a sailing, the vessel called at Busan on the way, discharge took three days, and the box sat at the terminal over a weekend before a truck was available.

Port-to-port transit is a real number and a small fraction of the answer. Building a date you can commit to means counting the segments that never appear in a freight quote, and those segments regularly add more days than the ocean crossing itself.

Key Takeaways

• Port-to-port transit when shipping from China to US west coast ports typically runs 14 to 20 days, while door-to-door commonly runs 20 to 30.

• Measured from cargo ready date, real end-to-end times have recently sat well above 30 days on the west coast lane.

• East coast and Gulf routings add roughly 10 to 20 days over west coast services.

• Shared container shipments add around 5 to 7 days for consolidation at origin and deconsolidation at destination.

• Chinese New Year distorts everything for six to eight weeks, and orders placed in January for February delivery will be late.

Why the Quoted Transit Time Is Not Your Arrival Date

Freight quotes describe the leg the forwarder sells. The journey your inventory actually takes starts earlier and finishes later, and the gap is where planning fails.

Port to Port Is the Middle Segment

A quote saying 16 days measures vessel departure to vessel arrival. It does not include the wait for a sailing, the trucking from your factory to the port, export clearance, discharge at the destination terminal, customs release, or the drayage move (the short truck haul from port to warehouse) at the end.

Flexport's Ocean Timeliness Indicator, which measures from cargo ready date at the factory through to departure from the destination port, has shown China to US west coast figures in the mid-thirties of days during 2026, against port-to-port quotes roughly half that. The discrepancy is not carriers overpromising. It is a different measurement covering more of the journey.

Visibility has improved and has not closed the gap. Live milestone tracking is standard across most forwarders in 2026, so you can see where a container is at any moment. Knowing a box sits at a transshipment hub does not shorten the wait, and buyers sometimes mistake better information for better performance.

The Segments Nobody Puts in the Quote

Seven stages carry time: factory to port trucking, export clearance and terminal receipt, the wait for your booked vessel, the ocean crossing, discharge and terminal processing, customs release, and inland delivery. Each has its own variance, and variance compounds. A one-day slip in each of four stages is a four-day slip overall.

Write the stages down as a list with your own estimates beside them, then compare that total against the number in the quote. Buyers who do this once rarely go back to planning from the port-to-port figure.

Expert Tip:I plan from cargo ready date rather than from shipment date, and I ask suppliers to confirm cargo ready in writing a week before it happens. Shipment date depends on a sailing schedule nobody controls, while cargo ready is the one milestone your supplier owns completely. Anchoring the plan to it separates supplier delay from carrier delay cleanly, which matters enormously when you are working out where a three-week problem actually originated.

The Ocean Leg and What Determines Days at Sea

Time at sea varies by destination coast, by service type and by whether your box changes vessels. Those three variables explain most of the spread between quotes.

West Coast Against East Coast

Services to Los Angeles, Long Beach, Oakland and Seattle typically run 14 to 20 days port to port from the main Chinese ports. Premium express services on this lane can reach the west coast in around 10 to 13 days at a significant price premium, which occasionally beats air freight on total cost for mid-value goods.

East coast and Gulf destinations generally run 30 to 45 days, since the distance is greater and routing is more complex. When canal transit is congested, some importers ship to the west coast and move cargo inland by rail instead, which can recover meaningful time against an all-water routing at modest extra cost.

Origin port choice shapes the ocean leg more than buyers expect. Sailing frequency differs between Shanghai, Ningbo, Yantian and Qingdao, and a factory in one province may truck to a port with three weekly departures or one with daily ones. Ask your forwarder which origin port gives the best schedule for your cargo ready date rather than defaulting to the nearest one.

Direct Services and Transshipment

A direct service loads at your origin port and discharges at your destination port. A transshipment routing unloads your container at an intermediate hub, where it waits for space on a second vessel. That wait is not fixed and does not appear in the quoted transit time as a separate line.

Ask for the routing and the port pairs before booking, and treat direct and transshipment services as different products rather than as competing prices. On tight timelines the difference decides whether you make a season.

Common Mistake to Avoid:Building your inventory plan on the quoted ETA (estimated time of arrival) is the error that produces stockouts. The word estimated is doing real work in that phrase, and schedule reliability across the industry has spent years well below what buyers assume. Plan against a date range instead of a single day, use the pessimistic end for customer commitments, and check the vessel schedule weekly rather than waiting for your forwarder to report a delay you could have seen coming.

The Two Ends: Origin and Destination Time

Both ends of the lane consume more days than importers expect, and both are more controllable than the ocean leg.

From Cargo Ready to Vessel Departure

Once goods are packed, they need trucking to the port, an export declaration, and delivery into the terminal before the cut-off. Cut-offs come in two forms: a documentation deadline several days before sailing, and a physical cargo deadline usually a day or two later. Missing either rolls your container to the next sailing, which on a weekly service means seven lost days.

Space availability matters as well. During peak periods carriers oversell capacity and roll containers even when everything on your side was correct. Booking two to three weeks ahead of cargo ready date reduces exposure considerably, and it costs nothing to do.

Peak season compresses everything at this end. The weeks before Chinese New Year and the run-up to the autumn retail season both produce heavy booking demand, tighter cut-off enforcement and more rolled containers. Shipping outside those windows where your product allows it removes a category of delay rather than merely managing it.

From Arrival to Available

Discharge and terminal processing typically take two to four days after the vessel berths. Customs release can be same-day for a clean entry with documents filed in advance, or considerably longer if your shipment is selected for examination. Then the container needs a truck and an appointment, which during busy weeks is the constraint that bites. Major gateways publish this data, and thePort of Los Angeles cargo operations dashboardreports import container dwell in bands alongside truck and rail dwell times, updated each business day.

Shared container shipments add time at both ends. LCL cargo (less than container load, where your pallets travel with other shippers' goods) waits for the consolidation container to fill at origin and for deconsolidation at destination, commonly adding five to seven days in total.

Expert Tip:Send documents to your customs broker the day the vessel sails, not the week it arrives. A clean entry filed early clears quickly, and the cost of being early is zero. I keep a standing instruction with suppliers that the commercial invoice, packing list and bill of lading go out within 48 hours of departure. Most delays I see at the destination end are document delays wearing a customs costume, and they are entirely preventable from your desk.

Building a Date You Can Plan Around

The point of all this counting is a number you can give a customer. Getting there means working backwards and building in the right kind of slack.

Working Backwards From Your Sell-By Date

Start with the date stock must be sellable, subtract receiving and processing time at your warehouse, subtract inland delivery, subtract customs and terminal time, subtract the ocean leg, subtract the wait for a sailing, and subtract production. That total is your order date, and it is usually earlier than instinct suggests.

For west coast destinations, a workable planning figure from order placement to sellable stock is often 60 to 90 days including production. East coast destinations push toward 75 to 105. Treat those as starting frameworks and refine them with your own shipment history, which is far more useful than any published average.

Communicate the date as a window rather than a day. Retail customers and marketplace planning both cope well with a stated range and badly with a firm date that moves twice. Giving the pessimistic end of your range as the commitment, then delivering early, is a considerably better position than the reverse.

Buffers and Calendar Risk

A buffer of around two weeks on top of your calculated date is common practice among experienced importers, and some carry more on high-stakes launches. The buffer is not pessimism, it is arithmetic.Sea-Intelligenceput global schedule reliability at 62.6% in June 2026, with vessels that did arrive late running an average of 5.31 days behind. Roughly one sailing in three misses its window, and that is the number your plan has to absorb.

Calendar risk deserves separate treatment. Chinese New Year fell in mid-February during 2026 and lands in early February in 2027, with factories winding down two to three weeks beforehand and taking one to two weeks to return to full output afterwards. Golden Week in early October creates a smaller version of the same effect. Orders that need to land in the first quarter should be placed and booked well before the December rush.

Expert Tip:Keep a simple record of every shipment you run: cargo ready date, sailing date, arrival date, and date available at your warehouse. After six shipments you have a private benchmark worth more than any industry figure, because it reflects your suppliers, your ports and your broker. I've watched buyers argue with forwarders using published averages when their own history told a clearer story. Four columns in a spreadsheet is the whole exercise.

Where NewBuyingAgent Shortens the Front End

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Frequently Asked Questions

How long does shipping from China to the US actually take?

Port to port runs roughly 14 to 20 days to the west coast and 30 to 45 days to the east coast. Door to door, most importers see 20 to 30 days for west coast destinations and 30 to 45 for east coast. Measured from the date goods are ready at the factory, recent figures on the west coast lane have sat above 30 days.

Why is my container later than the ETA I was given?

Common causes are a rolled booking at origin, a transshipment wait, terminal congestion at arrival, a customs examination, or no available trucking appointment. Schedule reliability on this lane has been well short of perfect for years. Ask your forwarder which of those applies, since the answer determines whether anything can be done.

Is air freight worth it to recover a delayed shipment?

Air moves in roughly 5 to 10 days door to door and costs several times more per kilogram. It usually makes sense for goods above roughly $15 to $20 per kilogram in value, or where a stockout would cost marketplace ranking. Splitting a shipment, with a portion by air and the balance by sea, is often the better answer than converting the whole order.

How much buffer should I build into my planning?

Two weeks on top of your calculated arrival date is a common working figure, with more for launches and seasonal deadlines. Build the buffer into the order date rather than into the promise you give customers. Your own shipment history is the best guide once you have run half a dozen containers.

Conclusion

Transit time is an addition problem that most importers only solve halfway. Count from cargo ready to sellable stock, treat the ocean leg as one of seven segments, and keep your own record of what actually happened on each shipment. Buyers who plan that way stop making promises the calendar was never going to keep. For the part of the timeline that runs before the container, NewBuyingAgent manages factory selection, production oversight and delivery from China.

Sources

1. Sea-Intelligence — Global Liner Performance report, global schedule reliability and average delay for late vessel arrivals, June 2026 —https://sea-intelligence.com/press-room/400-global-schedule-reliability-drops-to-62-6-in-june-2026— accessed 5 August 2026

2. Flexport — Ocean Timeliness Indicator, weekly transit benchmark from cargo ready date to destination port departure —https://www.flexport.com/blog/flexport-ocean-timeliness-indicator/— accessed 5 August 2026

3. Port of Los Angeles — Cargo Operations Dashboard, daily import container dwell, truck turn and rail dwell statistics —https://portoflosangeles.org/business/operations— accessed 5 August 2026