An on-board courier (OBC), also called hand-carry, is a person who buys a seat on a scheduled passenger flight and carries your shipment as their own checked or cabin baggage, keeping it in their custody from pickup to delivery. It exists for small, urgent, high-value consignments where losing a day costs more than the courier's fare and fee: a grounded aircraft, a stopped production line, a sample that has to be on a buyer's desk tomorrow. The key takeaway: OBC buys control and speed through the airport, not capacity. It only works for what a courier can lawfully carry as passenger baggage, and the goods remain commercial goods for customs, export control and dangerous goods purposes. For anything larger, the comparison is with next-flight-out air cargo or a charter, which our guide to air charter vs scheduled air freight covers in detail.
How an on-board courier shipment works
- Quote and booking. The provider checks commodity, weight, dimensions, value and destination, finds the fastest flights a courier can make, and books a ticket, usually a flexible fare.
- Pickup. The courier collects the goods with the commercial invoice, export paperwork and any certificates the item needs (an aircraft part normally travels with its release certificate). Good practice is for the courier to see the goods packed, because at check-in and security they answer for what is in the bag.
- Flight. The goods go in the hold as checked baggage or stay in the cabin. If a connection slips, the courier rebooks themselves and the goods, which unaccompanied cargo cannot do.
- Arrival and delivery. The courier declares the goods to customs as commercial goods, often with a broker lined up in advance, then hands them to the consignee.
The defining feature is unbroken custody: the shipment never sits in a cargo terminal waiting for a cut-off, a build-up or a release from a ground handler.
When OBC beats next-flight-out or a charter
There are three ways to move something urgent by air, and they suit different shipments. Next-flight-out (NFO) puts the shipment on the first available commercial flight as priority cargo, unaccompanied. A charter hires a whole aircraft. OBC sends a person with the goods.
| Factor | On-board courier | Next-flight-out cargo | Air charter |
|---|---|---|---|
| Practical size | What fits in passenger baggage, a few pieces of limited weight each | Anything the aircraft hold and the cargo acceptance rules allow | Up to the aircraft's full payload |
| Custody | Courier holds or tracks the goods throughout | Handed to the airline and its handlers | Dedicated aircraft, but cargo still handled at both ends |
| Airport dwell | None beyond passenger check-in and arrival customs | Cargo cut-off before departure and terminal release after arrival | Flexible, set around the charter schedule |
| Disruption recovery | Courier rebooks on the next passenger flight | Airline or forwarder rebooks the cargo | Depends on the operator and aircraft |
| Dangerous goods | Very limited (passenger rules, see below) | Possible as declared cargo, within the DGR | Possible as declared cargo, within the DGR |
| Cost driver | Courier time, tickets and baggage charges, largely independent of weight | Chargeable weight at a premium rate | The whole aircraft, regardless of load |
A common misconception is that OBC is always faster than NFO. On a direct lane with a robust part, NFO may arrive just as quickly at a fraction of the cost, because the cargo flies on the same aircraft the courier would have taken. OBC earns its premium where the cargo process itself is the delay: a cargo cut-off several hours before departure, a transit hub where cargo connections are slow or uncertain, customs at the destination that can be cleared by a passenger at night but not by a cargo terminal until the next working day, or goods too valuable or sensitive to leave with handlers. A charter only makes sense when the shipment is too big for a courier and too urgent or too awkward for scheduled cargo space.
Typical use cases
- AOG aircraft parts. An aircraft on ground (AOG) waiting for a small rotable, avionics unit or seal costs its operator for every hour it sits.
- Production line-down parts. A missing controller or sensor can stop an automotive or electronics line, and the stoppage usually dwarfs the courier bill.
- Samples and prototypes that must reach a buyer, test lab or trade show on a fixed date.
- Original documents and data media needed for a signing, tender or deadline.
The limits: what a courier can and cannot carry
Baggage size, weight and piece count
A courier is a passenger, so the shipment has to fit that passenger's baggage rules. Allowances vary by airline, route and fare, and extra pieces or weight are bought on top. Many airlines refuse any single checked bag over 32 kg (Cathay Pacific and Malaysia Airlines have explained the cap as protecting baggage handlers), and OBC providers commonly work to 32 kg per piece. Cabin baggage is smaller still. Several couriers can split a larger shipment, but beyond a few pieces the economics swing back to NFO or charter.
Dangerous goods: passenger rules are for personal items
This is the limit most often misunderstood. Under the IATA Dangerous Goods Regulations (subsection 2.3) and the ICAO Technical Instructions they follow, dangerous goods must not be carried in passenger or crew baggage except as specifically permitted, and the permitted items are framed around a traveller's own needs. US federal rules show the same logic: 49 CFR 175.10 exempts listed hazardous materials only "when carried by aircraft passengers or crewmembers", and several of the exceptions, including portable electronic devices, apply only to items carried "for personal use". Spare lithium batteries must be in carry-on baggage only, lithium ion spares must not exceed 100 Wh, and a passenger may carry at most two spares above 100 Wh and up to 160 Wh with the airline's approval.
The practical consequence: a courier cannot use passenger allowances to move a commercial consignment of dangerous goods. Batteries shipped as stock, chemicals, aerosols, paints, adhesives, magnetised material and anything else classified under the regulations must travel as declared air cargo with a shipper's declaration, if they are permitted by air at all. Equipment that contains lithium batteries needs particular care, and many OBC providers will ask for the battery specification before accepting it. Our guides to IATA and IMDG dangerous goods rules and shipping lithium batteries by air and sea explain the cargo route.
Security screening
Both checked and cabin bags go through passenger screening, and the cabin liquids rules apply to the courier like anyone else. Sealed packaging does not exempt the contents from inspection, so the courier should know what is in every piece and carry documents that describe it plainly.
Customs: hand-carried goods are still commercial goods
The second big misconception is that goods carried by a passenger slip through customs as personal baggage. They do not. Personal duty-free allowances apply to a traveller's own goods, not to goods carried for a business, and a courier who presents commercial goods as personal effects is making a false declaration. The treatment depends on the country, but the pattern is consistent:
- United Kingdom. HMRC guidance on bringing commercial goods into Great Britain in baggage (last updated 23 January 2026) allows a simple online declaration, made in the 5 days before arrival, for goods worth less than 2,500 pounds and weighing less than 1,000 kg, provided they are not restricted, controlled or excise goods and no relief is being claimed. Above those limits a full import declaration is needed before arrival, normally through a customs agent. There is no duty-free allowance for commercial goods.
- United States, imports. Commercial goods carried by a traveller are declared on arrival. Under 19 CFR 143.21(a), shipments not exceeding 2,500 US dollars can generally use informal entry; above that, a formal entry is normally required, usually filed by a licensed customs broker. Some goods cannot use informal entry at any value, so check before the courier flies.
- United States, exports. Hand-carrying does not take goods outside the export filing rules. The Foreign Trade Regulations exempt baggage and personal effects from Electronic Export Information filing (15 CFR 30.37(p)), but goods carried to a customer are not personal effects. EEI is generally required when any single Schedule B line exceeds 2,500 US dollars or an export licence is needed, unless another exemption applies, such as a temporary export returning within a year. See our guide to AES and EEI export filing.
Export controls apply in full. A controlled item carried in a suitcase is exported exactly as if it went as cargo, and licence requirements do not change with the mode.
Two reliefs come up often in OBC work. An ATA carnet suits goods that will come back: commercial samples, professional equipment and exhibition goods shown at a trade fair and returned. It does not fit goods that will be sold, consumed or installed, so an AOG part fitted to the aircraft is a normal import, not a temporary one. For aircraft parts specifically, Article 24 of the Chicago Convention provides for spare parts for foreign aircraft engaged in international air navigation to be admitted free of customs duty, subject to the importing state's rules and supervision. Whether and how that relief applies to a given part is a question for the broker at destination, ideally before the courier lands. If you are unsure who should make the declaration, our guide on whether you need a customs broker sets out the options.
How OBC pricing is built
OBC is priced from the courier's time and travel, not from the weight of the goods, which is why a 2 kg part and a 20 kg part on the same route can cost almost the same. Air cargo works the other way round, as our guide to how air freight pricing works explains. A typical OBC quote is built from these components:
| Component | What drives it |
|---|---|
| Courier fee | A day rate or mission fee for the courier's time door to door, sometimes including the return day |
| Air tickets | Last-minute, often flexible fares out and back; a higher cabin may be specified for the baggage allowance |
| Excess baggage | Airline charges for pieces or weight above the fare's allowance |
| Ground transport | Pickup to the departure airport and delivery from the arrival airport |
| Customs and duties | Broker fees for export and import declarations, plus duty and import tax at cost |
| Expenses | Hotel, meals and visas if the courier has to overnight or needs one |
Ask whether the quote is all-in or estimated, and which items are passed through at cost. Airline baggage charges and duties can only be estimated until check-in and clearance.
Insurance needs its own line. If checked baggage is lost or damaged, an airline's liability under the Montreal Convention is limited to 1,519 Special Drawing Rights per passenger (the limit since 28 December 2024), unless a special declaration of interest was made at check-in, and the courier has to prove the value. That will rarely cover a high-value part. Arrange cargo insurance for the declared value, as covered in our guide to why carrier liability is never enough.
What to ask an OBC provider
- Is the courier an employee or a subcontractor, and who is liable if the goods are lost?
- What is the routing, and the fallback if a connection fails?
- Checked or cabin baggage, and how many pieces and kilograms does the quote assume?
- Has the commodity been reviewed for dangerous goods, including batteries?
- Who files the export and import declarations and who pays duty and import tax?
- Does the courier have the right passport and visa for the destination and any transit point?
- What insurance is included, and up to what value?
- Which costs are fixed, and which are estimated or passed through at cost?
What to do next
- Write down the commodity, HS code, weight, dimensions, value and the latest acceptable delivery time before you call anyone; a provider can quote much faster with these.
- Check whether the goods contain anything classified as dangerous goods, including batteries. If they do, plan for NFO cargo with a shipper's declaration rather than a courier.
- Get two quotes on the same brief: one OBC and one NFO. If the times are close, the cheaper NFO option often wins.
- Line up the customs side at both ends (export filing, import declaration, carnet if the goods are returning) before the courier leaves.
Time-critical work rewards having providers lined up before you need them. More than 29,300 logistics companies are searchable by country and service in the CargoLinked directory, so you can identify forwarders at both ends of a lane that handle urgent air shipments, and the public requests board lists freight that shippers have posted for forwarders to quote on directly.
This guide is general information, not legal, customs, dangerous goods or tax advice. Baggage policies, customs thresholds and dangerous goods rules change and vary by airline and country; confirm the current requirements with the airline, the customs authority of each country involved, or a licensed customs broker or dangerous goods professional before you ship.
