What is an air waybill (AWB)?
Definition, structure and specifics of the AWB - from chargeable weight to automated air freight invoice auditing
The air waybill (AWB) is the standardised freight document of air cargo. Its structure follows IATA specifications, which makes it more uniform worldwide than the documents of any other transport mode. The AWB confirms takeover of the shipment, documents the contract of carriage and carries the billing basis - but it is not a document of title: unlike the bill of lading, the AWB transfers no right to the goods; release is to the named consignee.
Key facts
- IATA-standardised and non-negotiable - receipt and contract evidence, not a document of title.
- The AWB number has eleven digits: a three-digit airline prefix + an eight-digit serial number with check digit.
- Master AWB (airline → forwarder) and house AWB (forwarder → customer) exist in parallel in consolidations.
- Billing uses the chargeable weight: the higher of actual and volumetric weight (standard: 1 m³ ≈ 167 kg) - the classic source of discrepancies in freight invoice auditing.
- With the e-AWB, the electronic waybill has become the default in air freight; mixed paper and digital stocks remain everyday reality nonetheless.
Structure and core fields
An AWB contains, in standardised fields:
- Parties: shipper, consignee, issuing agent (forwarder),
- Route: airports of departure and destination (IATA codes), routing via intermediate stops if any,
- Shipment: number of pieces, gross weight, chargeable weight, nature of goods,
- Billing: rate class, rate/charge, surcharges and fees (e.g. fuel and security surcharge, handling), payment terms (prepaid/collect).
Unlike CMR or B/L, the AWB thus carries the billing logic inside the document: whoever audits air freight invoices finds the reference values in the waybill itself.
Chargeable weight: the most frequent source of differences
Air freight is billed on the higher of two values: the actual gross weight and the volumetric weight (standard conversion 6,000 cm³ per kg, i.e. 1 m³ ≈ 167 kg). Light, bulky shipments are billed by volume. In practice, discrepancies arise when airline, forwarder and shipper calculate with different dimensions or rounding - or when the house AWB carries different values than the master AWB. Position-level freight invoice auditing recalculates the chargeable weight from the document data instead of adopting the invoiced value.
Automated extraction and auditing
AI-based extraction captures AWB number, airports, weights, rate class and charges template-free - across airline and forwarder layouts, from scans included. The values feed the 3-way match of invoice, rate agreement and waybill; every adopted value remains traceable to its source location via visual grounding. Together with packing list, commercial invoice and customs documents, the complete, verified document set of the air freight shipment emerges.
Frequently asked questions (FAQ)
What is an air waybill?
The IATA-standardised freight document of air cargo: receipt and contract evidence carrying the shipment’s billing basis - but not a document of title.
How is the AWB number structured?
Eleven digits: a three-digit airline prefix plus an eight-digit serial number whose last digit is a check digit.
What is the difference between master AWB and house AWB?
The airline issues the master AWB to the forwarder, the forwarder issues house AWBs to its customers - in consolidations both exist in parallel.
What does chargeable weight mean?
The higher of actual and volumetric weight (standard: 1 m³ ≈ 167 kg). It is the billing basis and the most frequent source of differences in air freight invoices.
Can AI read and audit air waybills automatically?
Yes - template-free extraction captures the AWB fields and recalculates the chargeable weight; deviations from the invoice land in the review queue with their source location.
Further reading: The solution page freight invoice automation shows the 3-way match for air, sea and road freight in detail - EU-hosted, live in under 4 weeks.