Unlike sea freight, air cargo experiences rapid handling, aircraft vibration, pressure changes, pallet stacking, and multiple loading operations within a short period. As a result, air freight packaging must meet strict airline handling standards while remaining lightweight and cost-efficient.
In this guide, we walk you through the packaging requirements for air shipments, cargo protection methods, and practical packaging solutions.
Why proper packaging matters in air cargo
Many shippers underestimate how rough air cargo handling can be. Cargo may be moved multiple times within hours using forklifts, conveyor systems, pallets, and cargo nets.
Improper freight packaging can result in:
- Broken products
- Water damage
- Crushed cartons
- Cargo rejection
- Customs inspection issues
- Insurance disputes
- Additional airline charges
Additionally, airlines prioritize safety. Weak packaging can become a risk during loading or turbulence. Therefore, carriers may refuse poorly packed shipments.
Air freight weight and size restrictions
Before preparing air freight shipments, it’s essential to understand the size and weight limits imposed by airlines.
Airlines regulate cargo height, length, and width based on aircraft type and loading equipment, which means not every shipment can be accepted in standard form.
For general air freight, standard pallet or unit load device (ULD) dimensions typically do not exceed:
- Length: 44 m (96 in)
- Width: 15 m (125 in)
- Height: up to 1.6 m (63 in), depending on the route and aircraft
However, these are not fixed limits across all carriers. Final acceptance always depends on the operating airline and the available space on the aircraft.
Aircraft type matters
Additionally, cargo height limits vary significantly depending on the aircraft used:
Passenger aircraft (belly cargo):
- Short-haul routes: 60–80 cm height limit
- Medium-haul routes: up to around 110 cm
- Long-haul routes: can reach up to 160 cm in some cases
Dedicated cargo aircraft:
- Much more flexible loading capacity
- Height can reach up to 300 cm, depending on the aircraft model
- Better suited for oversized or industrial cargo
Oversized cargo handling
If your shipment exceeds standard air freight dimensions, it is still possible to transport it, but it requires special handling arrangements.
In such cases, airlines may require:
- Oversized cargo approval in advance
- Special loading equipment or ULD customization
- Additional handling fees
- In extreme cases, a full or partial cargo aircraft charter
Air freight packaging requirements
1. Understand air cargo security screening
Most air freight shipments must undergo security inspection before departure. Depending on the cargo type and shipping arrangement, inspections are usually carried out in one of the following ways:
- Piece-Level Examination: A Regulated Air Cargo Agent (RACA) inspects each carton or item individually, usually for loose or smaller shipments.
- Consolidated Cargo Screening: Cargo is palletized or loaded into Unit Load Devices and screened as one consolidated shipment, commonly used for larger exports.
- Approved Known Consignor Program: Cargo from approved consignors may require less security screening, depending on local aviation regulations.
2. X-Ray screening size and weight limits
Generally, airlines use X-ray machines for air cargo inspection. Therefore, shipments must fit within standard screening dimensions.
For palletized cargo, the typical X-ray screening limits are:
- Maximum dimensions: 20 m × 1.20 m × 1.53 m (L × W × H)
- Maximum weight: 1,000 kg per pallet
If your cargo exceeds these limits, airlines may require additional screening or special handling arrangements.
3. Use strong packaging materials for air freight
For most air shipments, new double-wall corrugated cartons offer the best balance of strength, weight, and cost. Compared with single-wall or reused boxes, double-wall cartons provide better compression resistance and stronger protection for fragile or high-value goods.
Before selecting packaging materials, consider the following factors:
- Cargo weight: Make sure the carton or crate can support the shipment’s weight without collapsing.
- Moisture exposure: Changes in temperature and humidity during flights can damage sensitive goods.
- Cargo security: Plain outer packaging without logos or product markings helps reduce the risk of theft during transit.
Best packaging materials for air cargo
In addition to corrugated cartons, here are some of the most commonly used air freight packaging materials:
Wooden crates
Wooden crates are ideal for:
- Heavy machinery
- Fragile equipment
- High-value cargo
For international exports, wooden packaging must comply with ISPM 15 regulations.
Foam cushioning
Foam materials absorb shock and vibration during transport. Common options include:
- Polyurethane foam
- EVA foam
- Custom foam inserts
These materials work especially well for electronics and fragile cargo.
Stretch film and pallet wrap
Stretch wrapping secures cartons on pallets and prevents cargo movement during transit. It also offers basic protection against dust and moisture.
Moisture barrier packaging
Moisture protection is important for products sensitive to humidity, including:
- Electronics
- Metal components
- Precision machinery
Moisture barrier bags, desiccants, and vacuum packaging help prevent corrosion and condensation damage during air transport.
4. Palletizing and cargo securing methods
Proper palletizing improves air cargo safety and handling efficiency.
Best practices for palletizing
- Use strong, undamaged pallets
- Distribute weight evenly across the pallet
- Avoid cartons hanging over the edges
- Secure cargo with straps or bands
- Wrap pallets tightly with stretch film
Meanwhile, damaged pallets should never be reused.
Air cargo ULD considerations
Many airlines load shipments into air cargo container. This method improves handling efficiency, but it still requires proper packaging. Goods must remain stable, protected, and well-secured inside the unit.
However, air freight does not always rely on ULDs. Some shipments move as individual cartons or crates, depending on cargo type, size, and airline requirements.
In most cases, freight forwarders can help determine the most suitable loading method based on your shipment structure and destination requirements.
5. Label shipments clearly
Each shipment must display accurate handling labels so logistics teams can manage the cargo correctly.
Clearly indicate special handling instructions, such as:
- “Fragile” for delicate goods
- “This side up” for orientation-sensitive cargo
- “Keep dry” for moisture-sensitive products
- Hazard labels for regulated dangerous goods
Apply all labels in large, easy-to-read fonts and place them on multiple sides of each carton or pallet. Each label should also include key shipment details, such as the destination address, return address, and shipment reference number.
To avoid issues during transit, also place a copy of essential contact details inside the package in case external labels fall off.
6. Include a complete commercial invoice
Every international air freight shipment must include a commercial invoice. This document allows customs officers to identify the shipment contents, value, and shipper details.
Without a correct invoice, customs may hold the cargo, leading to delays, storage charges, or clearance issues.
Always ensure the commercial invoice clearly lists:
- Product description
- Quantity
- Declared value
- Shipper and consignee details
Cargo insurance for air freight
Even with strong packaging and careful handling, unexpected problems can still happen during international shipping. For this reason, cargo insurance remains an important part of air freight shipping. It provides financial protection and helps reduce the risks associated with high-value or fragile cargo.
Sustainable air freight packaging solutions
Today, many businesses look for sustainable air freight packaging solutions that reduce waste while protecting cargo during transport.
Popular sustainable packaging materials include:
- Recyclable cartons
- Biodegradable fillers
- Reusable pallets
- Paper-based cushioning
- Lightweight packaging materials
Reducing unnecessary packaging not only lowers waste but also helps decrease volumetric weight and air freight costs.
In addition, lightweight and recyclable materials can improve operational efficiency and support long-term sustainability goals.
Expert tips for safe air freight shipping
After years of handling international shipments from China to the global market, the ASLG team understands one important fact:
Most cargo damage starts with poor packaging, not transportation itself.
To reduce shipping risks and avoid unnecessary costs, we support:
- Cargo size and weight checks based on airline requirements
- Export-grade packaging solutions for different cargo types
- Palletizing and cargo securing services
- Moisture and shock protection for sensitive products
- Packaging support for oversized cargo and industrial equipment
- Dangerous goods packaging assistance
- Air freight pallet preparation and wrapping
- Packaging optimization to reduce volumetric weight and shipping costs
- Cargo inspection and loading coordination before departure
