Grey charter, how to recognise an illegal flight
A flight sold for money without a commercial certificate can look exactly like the real thing. Here is how the rules are bent, why it matters and the signs to watch for.
Grey charter is the polite name for something blunt: a flight sold for money by someone who is not allowed to sell it. The aircraft may be immaculate and the pilot experienced. What is missing is the commercial certificate, and with it the oversight, the training regime and very often the insurance that a paying passenger assumes are in place.
Private and commercial flying are two legal worlds
In the United States the line runs between two parts of the Federal Aviation Regulations. Part 91 contains the general operating rules that apply to every flight, private ones included. Part 135 adds the much stricter requirements for on-demand commercial operations, and only an operator certificated by the FAA may fly under it. Offering transport to the public for payment, known as , is exactly what requires that certificate.
European rules draw the same line in different words. Commercial air transport needs an Air Operator Certificate (AOC) from the operator’s national authority, together with the rules on crew training, maintenance and flight time limits that come with it. A business jet flown privately operates under a separate and lighter set of rules for non-commercial flights. The aircraft can be identical. The obligations are not.
How the rules get bent
Most grey charter does not look like piracy. It looks like a private flight with a payment attached, and three patterns recur.
- stretched too far. A US private pilot may share fuel, oil, airport costs or rental fees with passengers, but must pay at least a pro rata share and have a common purpose for the trip. In Europe, cost-shared flights are limited to six people and to aircraft that are not classed as complex, which rules out every business jet.
- A lease that hands you the responsibility. You are asked to sign a lease for the aircraft alone, a so-called , while the same company supplies the pilot. On paper you become the party with operational control, and with it the responsibility for a flight you know nothing about.
- Owners and pilots selling direct. A privately owned aircraft is offered for paid trips to recover its running costs, or a pilot sells flights on an aircraft they can access, outside any certificate.
Why it matters to you
The first risk is insurance. An aircraft insured for private use may not be covered when it carries paying passengers, and the UK Civil Aviation Authority warns passengers plainly that on an unlicensed flight they may not be insured. The moment after an incident is the worst possible time to discover which policy applies.
The second risk is oversight. A certificated operator is inspected by its authority, must train and check its pilots on a fixed cycle, follow an approved maintenance programme and respect flight time limits. Outside that system nobody verifies whether the crew rested, whether the pilot is current on the type or whether maintenance is up to date. It may all be fine. You simply have no way of knowing.
It may all be fine. You simply have no way of knowing.
The warning signs
No single sign proves that a flight is illegal, but several together should stop the booking until you have clear answers.
- A price far below what comparable operators quote for the same class of aircraft and route
- Payment requested to an individual or a personal account rather than to a company
- The owner or the pilot selling the flight directly, with no operator named
- Vague or changing answers when you ask which company holds the certificate
- A request to describe the trip as private, or advice on what to say if an inspector meets the aircraft
- A lease or similar document that makes you responsible for the flight
- No safety briefing on board, and in the United States no on the invoice
Price needs context. Indicative charter rates for a light jet sit at about €3,800 to €5,200 per flight hour before VAT, with positioning on top. An offer well below that band deserves questions, unless it is a genuine empty leg from a named operator. In the United States, legitimate operators must charge federal excise tax, and the FAA lists its absence among its red flags, alongside coaching passengers on what to tell an inspector.
What to do if something feels wrong
- Ask in writing which company holds operational control of the flight, and under which certificate.
- Request the certificate and the page of the operations specifications that lists the aircraft registration.
- Ask for an insurance certificate that names the operator and the aircraft and covers commercial charter use.
- If the answers are missing, evasive or inconsistent, decline the flight and book with a certificated operator.
- Report the offer to the aviation authority of the country concerned.
Authorities want to hear about it. The FAA runs a hotline for reports of suspected illegal charter, and the UK CAA accepts reports from the public as well. Other national authorities have their own channels, usually listed on their consumer pages.
The industry takes the problem seriously, not least because legitimate operators lose business to it. In December 2020 twelve business aviation associations, among them the European Business Aviation Association, NBAA in the United States and the International Business Aviation Council, formed the Air Charter Safety Alliance to raise awareness of illegal charter among customers, brokers and authorities.
Terms in this article
- Holding out
- Offering air transport to the public for payment, which under US rules requires a commercial operating certificate.
- Dry lease
- A lease of the aircraft without crew. Combined with a pilot supplied by the same party, it is a classic route to illegal charter.
- Cost sharing
- Splitting the direct costs of a private flight among the occupants, allowed only within narrow limits and never for business jets in Europe.
- Federal excise tax
- A US tax on commercial air transportation that legitimate charter operators must charge.
Questions readers ask
Is a cheap empty leg a sign of grey charter?
Not in itself. A genuine empty leg is a commercial flight that a certificated operator has to fly anyway to reposition an aircraft, so a lower price is normal. It deserves the same checks as any charter: the operator’s name, the certificate, the aircraft on that certificate and insurance for commercial use. The warning sign is a low price combined with vague answers.
Can a private owner ever let passengers contribute to costs?
Only within narrow limits. US private pilots may share certain costs with passengers who have a common purpose, and owners of large or turbine-powered multi-engine aircraft can use specific arrangements such as time sharing, with defined limits on reimbursement. None of these allows selling flights to the public. In Europe, cost sharing is restricted to small aircraft that are not classed as complex, so it never applies to a business jet.
What should I do if I suspect a past flight was illegal?
Keep the documents you received, including the quote, the invoice and any lease or contract, and report the flight to the aviation authority of the country where it took place. The FAA runs a hotline for suspected illegal charter and the UK CAA accepts reports from the public. For future trips, ask for the operator’s certificate before you pay.
