Why Air Cargo Shipments Get Delayed — and How to Read the Signs in Tracking

Most air cargo delays are not mysteries. They follow a small number of patterns, and each pattern leaves a recognisable trace in the tracking history. If you learn to read those traces, you can tell within minutes whether a shipment is simply waiting for the next flight or whether someone needs to act, and you will know whom to call.

First, know who can see what

The airline reports what happens to the master air waybill inside its own network: acceptance, flights, arrival, notification and handover. It does not see the truck to the origin airport, and it usually has no visibility of customs brokerage or the final delivery. If your forwarder consolidated your goods, the airline also cannot see your individual house AWB. Keep that in mind when you read the history: silence from the airline is sometimes simply the shipment being somewhere the airline cannot see. Our status codes guide defines each event used below.

Delays at origin

Booked but not tendered

The forwarder booked space, but the cargo did not reach the airline's warehouse. It may still be at the factory, stuck in traffic, or waiting for export documents.

In tracking: BKD for a flight, then nothing. The flight departs, and either the booking disappears or a new BKD appears for a later date.

What to do: ask the shipper or forwarder whether the cargo has left the pickup point. The airline has nothing to report until it receives the goods.

Missed cut-off

Airlines set a latest acceptance time for each flight, which depends on the station and the type of cargo. Cargo delivered after that time is usually still accepted, but it is rolled to the next flight.

In tracking: RCS with a time close to departure, followed by a new booking on a later flight rather than DEP on the original one.

What to do: usually nothing beyond confirming the new flight with your forwarder.

Security screening

Cargo that does not come from a secure supply chain must be screened before loading. Busy screening facilities, items that cannot be cleared by the first method, or missing security status on the paperwork all add time.

In tracking: RCS, then a gap before any manifest or departure event. Some carriers show no dedicated screening status at all.

What to do: ask the forwarder whether the shipment was screened and released for loading.

Dangerous goods not compliant

If the Shipper's Declaration, marks, labels or packaging do not meet the IATA Dangerous Goods Regulations, the airline will refuse or hold the shipment until it is corrected.

In tracking: RCS or FOH (freight on hand) with no progress, sometimes a discrepancy event.

What to do: the shipper and forwarder must fix the documents or packaging. This cannot be solved by the consignee.

Delays in the air network

Offloaded for payload or capacity

On passenger flights, cargo travels in the lower deck and gets whatever weight and space remain after passengers, bags and fuel. Strong headwinds, a full passenger load or a swap to a smaller aircraft type can cut the cargo payload at short notice, and some cargo is offloaded.

In tracking: MAN for a flight, then no DEP for those pieces, followed by a new booking or manifest on a later flight. Some carriers show an explicit offload or discrepancy (DIS) event; others simply re-book.

What to do: confirm the new flight. If the cargo is offloaded repeatedly on the same route, ask the forwarder to consider an alternative routing or a freighter.

Missed connection at a hub

Much cargo moves through hubs such as IST, DOH or FRA. If the inbound flight arrives late or the transfer takes longer than planned, the shipment waits for the next onward departure.

In tracking: ARR and RCF at the hub, then a later onward booking. For a route like BEG–IST–DOH, the gap appears in Istanbul.

What to do: usually wait. If the next connection is several days away, your forwarder can ask the airline about alternatives.

Split shipments

A multi-piece shipment may travel on more than one flight, either by plan or because not all pieces fit.

In tracking: piece counts that do not match the AWB total, for example DEP for 3 of 5 pieces, and a separate event later for the other 2. Some interfaces show only the latest event, so you may see "Arrived" while two pieces are still at origin.

What to do: check pieces and weight on every line. The consignee normally cannot collect a partial shipment for customs clearance until all pieces arrive, depending on local practice.

Weather, air traffic control and peak season

Fog, storms, de-icing and airspace restrictions delay flights for everyone. Peak periods, such as the run-up to the end-of-year holidays, fill aircraft and warehouses, which leads to more offloads and slower handling.

In tracking: late DEP times, re-bookings across many shipments, and slower progress between ARR and RCF.

What to do: build buffer time into the plan, especially for deadline-driven shipments.

Delays at destination

Documentation discrepancies

If the pieces or weight on the AWB do not match the flight manifest or what was physically received, the shipment can be held while the stations reconcile it. Missing documents in the pouch have the same effect.

In tracking: DIS, or RCF with a different piece count from the AWB. You may also see no AWD (documents delivered) event.

What to do: give the forwarder the exact AWB number and piece count. It is worth validating the number with the AWB validator before chasing anyone.

Ground handler backlog

After arrival, a ground handler breaks down pallets and checks pieces in. When several freighters land at once, this takes longer.

In tracking: ARR followed by a long gap before RCF.

What to do: usually wait. If the gap passes a day, the forwarder's destination agent can query the handler directly.

Customs holds

Customs may request documents, inspect goods, or wait for duties to be paid. The airline holds the cargo until customs releases it.

In tracking: RCF and possibly NFD, then nothing for days. Customs events appear only on some carriers.

What to do: contact the customs broker, not the airline. Our customs clearance guide lists the documents usually requested.

Consignee not collecting

Cargo sits in the warehouse because nobody has picked it up. Storage charges normally start after a free period that varies by airport.

In tracking: NFD with no DLV.

What to do: if you are the consignee, confirm who is collecting. If you are the shipper, ask the buyer or the destination agent.

How long is too long?

There is no universal standard, and published transit times are planning figures, not guarantees. These practical rules of thumb help decide when to act:

• If there is BKD but no RCS after the planned flight has left, ask your forwarder the same day.
• If there is no new event 24 hours after the scheduled arrival, ask your forwarder to check with the destination handler.
• If the shipment has been re-booked more than once on the same leg, ask for an alternative routing.
• If NFD is more than a couple of working days old with no DLV, check customs status and collection arrangements before storage charges grow.
• If the piece count is short on arrival, raise it immediately, not after the rest arrives.

Whom to contact

Airlines generally deal with the party on the master AWB, which is usually the forwarder, so contacting the airline directly as a shipper or consignee rarely gets faster answers.

Checking the history on AWBTracking.net

Run the AWB through our free lookup and read the full event list, not only the latest status, paying attention to piece counts and stations. If something does not make sense, the troubleshooting page covers common tracking problems such as numbers not found or events that stop updating.