Flight duration does not show the total time a product spends in air-freight transit. The schedule for terminal acceptance, security, build-up, transfer, arrival unloading and customs varies by selected route.
Before booking, ask the carrier about cargo acceptance window, cutoff, possible transfers, how delay notices are sent and whether temperature-controlled holding is available. Put responsibility for the final leg from the last terminal to the consignee in writing.
In the shipment plan, record local time, responsible party, expected duration and actual events at each stage. This timeline shows where time accumulated; do not assume a particular hour or temperature effect without your own route records.
Validate the packaging separately using the actual product, starting temperature, cold source, waiting and transfer scenario. State logger location in the test plan and request handling-event records from the carrier. Air-cargo acceptance does not by itself prove that the hold chills the product or that packaging is adequate for the whole route. If dry ice is used, obtain current dangerous-goods and carrier approval separately.
