Transit time is the middle, not the total
A schedule might show 24 days port to port, but your goods are in motion far longer. Add the booking window before departure, export clearance and gate-in at origin, then import clearance, terminal release and inland delivery at destination. On most lanes these stages add ten to sixteen days around the ocean leg. Transshipment adds another variable: each relay port introduces a connection window of two to five days, and a missed connection rolls the box to the next sailing. When comparing routings, a direct sailing that looks slower on paper often beats a faster relay that risks a missed transfer.
Book earlier than feels necessary
Vessel space sells out first on the sailings everyone wants — month-ends, pre-holiday rushes and peak season. Booking two to three weeks ahead secures better rates and your choice of departure instead of whatever space is left. Last-minute bookings travel, but they travel on the carrier's terms. Equipment matters too: standard 40ft boxes are usually plentiful, but reefers, high-cubes and 20ft units in export-heavy regions can run short. If your cargo needs special equipment, add another week and name the container type explicitly on the booking.
Put the buffer where it protects you
One missed transshipment connection can cost a week, and no forwarder controls the weather. Promise your customers the second feasible arrival date, not the first, and keep safety stock against the longest leg of the journey rather than spreading it thin. Buffers feel expensive until the week they save you. Seasonality deserves its own buffer: autumn peak season and pre-Lunar-New-Year rushes routinely add a week of port congestion on major lanes. Mark those windows on your planning calendar a year out and pull forward any launch-critical stock.
Measure door to door, every time
After each shipment, record the dates that actually mattered: cargo-ready day, sailing day, discharge day and delivery day. Over a quarter, this log reveals which lanes run true and which need bigger buffers — the same discipline behind our 98% on-time arrival record. A simple spreadsheet works: one row per shipment, promised versus actual dates, and a note on the cause of any gap. Review it monthly with your forwarder so recurring problems — a congested relay port, a slow trucking leg — get fixed structurally instead of surprising you twice.
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