---
id: KB-LG-015
url: https://app.codecontract.io/help/logistics/air-cargo-what-changes-versus-road
idioma: en
categoria: sector-logistica
subcategoria: aereo
audiencia: usuario
nivel: intermedio
actualizado: 2026-08-13
tambienEn: [es]
relacionados: [KB-LG-013, KB-LG-002]
citadoPor: [KB-LG-018]
---

# Air cargo: what changes versus road

_It travels faster and stops for different reasons: here what delays you is not traffic, it is security and paperwork._

**Responde a:** sending goods by air documentation · why is all my air cargo screened · difference between air and road freight · what the airline needs to load

The first air shipment surprises nearly everyone: the flight takes four hours and the goods take four days. It is not the plane — it is everything that happens before it boards, and it runs on rules that road transport simply does not have.

## What changes versus a lorry

| Aspect | By road | By air |
| --- | --- | --- |
| Who may hand over the cargo | Anyone | Depends on whether you are accredited in the security chain |
| What is checked | The transport documents | The documents and, often, the cargo physically |
| What drives the price | Weight | Weight or volume, whichever is greater |
| What stops a shipment | An error in the transport document | Also packaging or a declaration that does not fit |
| Room to correct | Hours | The flight leaves anyway: it waits for the next one |

> [!IMPORTANT]
> The first row decides your lead times and almost nobody knows it before their first shipment: **if your company is not accredited within the air cargo security chain, every shipment goes through physical screening**. That adds time, cost and sometimes means opening the packaging you prepared so carefully. Accreditation is applied for, takes its own process and cannot be improvised for Thursday's shipment — but it changes the whole operation for anyone shipping regularly.

## What to have ready before booking

1. **A real description of the goods, not a commercial one** — «Samples» is not a description and generates the most queries.
2. **Weight and dimensions of the packed unit** — The charge comes from there, and a wrong measurement is corrected late.
3. **Knowing whether it contains anything restricted** — Batteries, aerosols, liquids: the whole procedure changes.
4. **And commercial documentation consistent with itself** — Invoice, packing list and your declaration must say the same.

> [!WARNING]
> What really holds shipments up is not customs: it is **something inside that nobody declared**. A device with a lithium battery, a spray can inside a box of spares, a sample containing alcohol. Whoever packs it does not think of it as dangerous because they handle it daily, and by air it has its own treatment. Asking «does this contain batteries, liquids or gases?» before packing avoids half the incidents.

## Who you talk to for what

**En corto**

- The freight forwarder places the cargo and knows what each airline accepts.
- The customs agent handles customs, which is a different matter.
- And security accreditation is your own process, not something the forwarder solves for you.

> [!NOTE]
> Which roles exist in the air cargo security chain, what each requires and which goods are restricted are governed by specific aviation rules and vary by country and airline. **Your forwarder or adviser settles that**; here we explain why air freight behaves differently and what is worth resolving beforehand.

**Is accreditation worth it?**

If you ship often, almost always: it saves on every shipment.

**Can I send anything by air?**

No, and what you cannot varies. Ask before packing.

**Why am I charged more weight than it weighs?**

Because volume counts when it is greater; measuring properly avoids surprises.

## Ejemplos

**A company air-freights spares and the shipment is grounded by an undeclared aerosol.**

- Checks for batteries, liquids or gases before packing and declares them

→ The next shipment leaves on the planned flight, with no box opened at the airport.

**Air documentation is prepared with less margin.**

- Checks what is missing when the booking is confirmed

→ The gap is caught before cut-off.

**A document arrives late and the cargo misses the flight.**

- Requests early whatever depends on third parties

→ The wait runs in parallel.

**A commodity restriction is discovered at the airport.**

- Checks the data sheet before accepting the load

→ The decision is taken with the document in view.

**A client asks about a shipment from months ago.**

- Keeps the file with its date

→ You answer without reconstructing.

**Every shipment is prepared from scratch.**

- Reuses what repeats per destination

→ The second shipment costs half.