Air freight from China is usually a matter of days; sea freight is usually a matter of weeks. That headline is true and still not enough to plan a PO. You must compare stacks: pickup, export, main carriage, customs, and delivery, on the same door, with the same cargo card.
This 2026 comparison covers process clocks, cost implications of time, planning bands, documents that steal days, DDP versus port, LCL versus FCL, packaging, customs exams, and mistakes. Bands are planning tools, not guarantees. Xinhan Logistics quotes a named origin and a named place. We will not pretend a brochure sailing is your ETA.
Ask for factory-ready date to sellable date. Anything shorter is marketing.
1. Compare stacks, not slogans
Air: pickup, airport terminal, screening, flight, destination breakdown, import, truck. Sea: pickup or CFS, export, gate-in, sailing, discharge, import, CY or destuff, truck. If you compare “6 hour flight” to “18 day sailing,” you have compared a movie to a logistics file. Stack versus stack.
2. Planning bands for air
Airport to airport often 3–8 days after the booking is real. Door to door often 5–12 days for routine commercial cargo with clean papers. Express parcels often 3–7 days. Weekends, peak, DG acceptance, and missing MSDS sit outside. Inland pickup to a distant gateway adds a day you should have counted.
3. Planning bands for sea
FCL water time depends on the string: many China–US West Coast bands about 14–22 days; US East Coast often 26–38; North Europe often 25–40; many Middle East bands 18–30. Door to door adds inland China, cutoff wait, and destination. LCL often adds 3–10 days versus a similar FCL because of consol and destuff. Blank sailings add weeks, not hours.
4. Planning table: clocks you should demand
| Clock | Air personality | Sea personality |
|---|---|---|
| Origin dwell | Airport cutoff and screening | CFS consol or CY gate-in / VGM |
| Main carriage | Flight plan in days | Vessel string in weeks |
| Arrival to available | Breakdown and import file | Terminal availability and free time |
| Last mile | Airport truck or DDP door | CY pickup, destuff, or DDP door |
| Exception | Offload, exam, DG reject | Roll, congestion, exam, storage |
Demand these clocks on both quotes. Xinhan Logistics plans bands, not birthday ETAs.
5. Why LCL is slower than people expect
Your cargo waits for other cargo. Then it waits to destuff. Then it waits for CFS release. That is why “sea is 20 days” on a website and your LCL is 30 to the door. If the comparison is air versus LCL, use LCL’s stack, not FCL’s brochure.
6. Why FCL can still miss a window air would hit
A box that sails on time can sit in detention because the warehouse has no slot. Time is not only water. Receiving capacity is a clock. Air pallets into a parcel door can beat FCL into a full yard even when ocean looked “only two weeks.”
7. Cost of time is part of how long
Longer sea means more inventory cash. Faster air means more freight cash. How long is a finance question. Put days on the P&L. Do not discuss transit as if it were free.
8. Documents that add days to either mode
Wrong consignee, late SI, late ISF-style filings, vague HS, missing battery papers. Air loses a flight. Sea loses a week. The document is a clock. A packing list that arrives after cutoff is how long it takes: until next week.
9. DDP versus port changes the end of the stack
Port arrival is not door arrival. DDP includes import and last mile, which can add days that a CY quote hides. Compare door to door if that is how you sell. Compare available-at-CY if you truly have a broker machine. Mixing them makes air look slower or faster than it is.
10. LCL versus FCL on the sea side of ‘how long’
If you are asking how long sea takes, first say which product. FCL availability at CY is one date. LCL cartons on a truck is another. A 2026 importer who says “sea takes 25 days” without LCL/FCL is quoting a rumour.
11. Packaging and time
Bad packing causes rewrap, exam, and claims — all extra days. Air reweigh arguments delay acceptance. LCL carton repairs delay destuff. Packaging is a transit-time control.
12. Customs exams and the comparison
One exam can erase air’s advantage. One exam on sea can push you past free time. Build clearance quality the same for both. Then the remaining difference is physics and strings, which is what you actually wanted to compare.
13. Origin city shifts both durations
Chengdu cargo is not Yantian cargo. Add inland days. A sea file from inland plus a slow consol can overlap an air file from Guangzhou in surprising ways. Name the factory when you ask how long.
14. Peak season stretches both, unevenly
Air queues at screening and allocation. Sea blank sailings and equipment shortage. In peak, widen the bands. Do not use an April stack to plan October. How long it takes is seasonal. Your SOP should say so.
15. How a forwarder should quote time
Factory-ready → cutoff → departure → arrival → available → delivered, each as a band. Assumptions listed (no exam, space confirmed, documents on day X). Xinhan Logistics would rather show a wide honest band than a fake exact ETA.
16. Common time mistakes
- Using sailing days as door-to-door days.
- Comparing express 4 days to FCL 18 water days as if both were doors.
- Ignoring the day the factory actually finishes packing.
- Assuming DDP is same duration as CY plus “a truck.”
- Planning zero days for destination customs.
17. What to send for a transit estimate
Factory-ready date, packed CBM and kg, origin city, destination city, LCL/FCL preference if any, DDP or port, commodity. We will return air and sea stacks. We will not return a single magic number.
18. Split shipments and mixed clocks
How long does the PO take if 15% flies and 85% sails? Two clocks. Plan sales on the air clock and replenishment on the sea clock. Do not average them into a meaningless 18 days.
19. Insurance waiting times
Claims extend the practical duration of a file even if transit was short. Photograph origin. Time to money after damage is part of “how long” for finance, even if operations hates hearing it.
20. What we will not publish
No live AIS-based promise for your unbooked cargo. No fake ‘today’s average air is 4.2 days.’ Bands plus a dated plan after booking are how time is managed.
21. Worked comparison logic
Goods packed 8 September in Dongguan, must be on a Los Angeles shelf 25 September. Air stack may fit. Sea FCL stack almost certainly does not unless the cargo is already at CY on a miracle string. Goods packed 8 September for a December DC fill: sea, and air would be a waste of chargeable kg. Copy the logic.
22. Reduce duration without defaulting to air
Hit cutoffs. Use FCL if LCL destuff is the delay. Pre-clear documents. Book earlier. Duration is often process, not physics. Switch to air when process cannot recover the date.
23. A short audit list
- Same door on both stacks.
- LCL/FCL specified for sea.
- Factory-ready date, not PO date.
- Customs days not assumed zero.
- Peak flag on / off.
24. How to choose using time
If the air stack is the only one that lands before the sellable date, choose air or a split. If both land, choose on cost and risk. How long is the filter. Money is the score among survivors.
25. Request both stacks
Email Xinhan Logistics the factory-ready date and the door. Ask how long air takes compared with sea on this card, with LCL and FCL separated. We will draw clocks, not slogans.
26. Plan the sellable date, then book
Transit time is a plan to a date you can defend in a sales meeting. Air is days. Sea is weeks. Your cargo card decides whether that gap matters. Freeze the date. Then freeze the mode.
27. Keep updating the stack after booking
How long it takes changes when a flight offloads or a vessel blanks. Demand exception calls the same day, not a quiet new ETA in a portal. Time management is communication. Quiet is a delay you have not named yet.
Weekends, holidays, and terminal calendars.
China Golden Week, destination public holidays, and weekend terminals change both stacks. Air can sit on a ramp. Sea can sit through a holiday window and then miss a truck slot. How long it takes includes calendars that are not sailing days. Put holidays on the Gantt. A band that ignores Golden Week is not a band. It is an April copy-paste into October.
Availability versus delivery: two different dates.
Cargo can be ‘available’ at CY or at an air cargo terminal and still be three days from the door. Appointments, chassis, and tail-lifts live in that gap. When you compare how long air takes versus sea, compare delivered dates if you sell from a warehouse, not available dates if you cannot pick up today. Many fake comparisons die here. Demand both timestamps.
Measurement: start the clock at factory-ready, not at PO stamp.
A PO dated 1 September with goods ready 18 September has a 17-day origin wait that is not freight. Importers who say sea is slow are often measuring PO-to-door, which includes production. Production is not air versus sea. Start at packed and ready. Then the comparison is fair. Xinhan Logistics will ask for factory-ready because otherwise we would be quoting manufacturing time in a freight disguise.
Rolls, offloads, and how to treat them in planning.
Plan a probability of one exception on peak strings and peak flights. Do not plan zero. If your sellable date has no exception margin, you do not have a sea option, and you may not have an air option either if allocation is tight. How long it takes in the real world is band plus exception. Buy margin or buy air earlier. Do not buy a single-point ETA and then act shocked.
Different destination regions, different stacks.
US West Coast sea is not US East Coast sea. Intra-Asia sea can overlap air on some short lanes in surprising ways. Europe rail is another stack entirely. This article compares air freight to sea freight from China as products. Your lane still needs its own numbers. Ask for the lane, not ‘international.’ Time is geography.
After-sales: returns and the reverse clock.
How long the reverse path takes can decide whether you fly a replacement or wait for a return-to-vendor sea file. Replacement air is often the hidden duration of a cheap outbound sea. If returns are common, include a reverse-time rule in the mode policy. Duration is a loop for some businesses, not a one-way sailing.
Screening queues and CFS close times as hidden days.
Air screening can add a night you will not see on a flight duration graphic. LCL CFS close can add two days you will not see on a sailing schedule. Ask the house where cargo sits waiting to become ‘on a plane’ or ‘on a vessel.’ Those dwells are how long it takes. Hide them and every comparison is optimistic by the same two days, which is enough to pick the wrong product.
Xinhan Logistics will show origin dwell as a band. If a competitor shows zero dwell, they are selling a flight time, not a file time. File time is what your warehouse feels.
Contact Our China Freight Forwarding Team
If you are importing from China and need a shipping plan, transit-time estimate, or all-in quotation, contact Xinhan Logistics. Send the product name, packed dimensions, gross weight, origin city in China, and delivery city so we can recommend LCL, FCL, air freight, or DDP door-to-door service.
Email: gzxinhang@126.com
Website: https://www.wuliuaou.com/
We handle sea freight, air freight, customs support, and door-to-door delivery for importers, wholesalers, and e-commerce sellers.