A single-entity charter is one in which an individual or company charters a plane and bears the entire cost of the flight, so that the passengers do not pay their own airfare. There is no minimum passenger requirement, since the cost is per flight, not per person. Single-entity charters are typically used for business purposes -- for example, travel to meetings and conferences, incentive travel or VIP leisure travel.
Fliers with flexibility should sign up for empty-leg email lists of companies like Magellan Jets, who regularly send out emails selling discounted flights from, say, the plane of a corporate exec who flew to Los Angeles but is looking to offset his cost of getting the plane back to New York. “I wouldn’t say that the cost of flying private has gone down, but there are new ways of pricing charter that makes it more accessible,” says David Zipkin, co-founder and VP of Tradewind, the service known for semi-private flights in the Northeast and Caribbean. “In our case, we save people money with our shared charters, and we also sell discounted empty legs.”

Lastly, don't be afraid to ask about safety: Any reputable operator should have safety information prominently featured on their website, and won't mind answering questions about their pilots, such as how many hours they have flown. (At least 250 hours, which is what it takes to get a commercial license; NetJets mandates at least 2,500 hours; Wheels Up, mandates 7,000 hours for a captain and 4,000 for a first officer.) Gollan suggests fliers ask if the pilot has any health issues, and feel free to ask if the operator (or plane itself) have any accidents or incidents in its history.
Flight departments are corporate-owned operators who manage the aircraft of a specific company. Ford Motor Company, Chrysler, and Altria are examples of companies that own, maintain and operate their own fleet of private aircraft for their employees. Flight departments handle all aspects of aircraft operation and maintenance. In the United States, flight-department aircraft operate under FAR 91 operating rules.
The forward wing sweep, 20,280 pounds (9.20 t) MOTW Hamburger Flugzeugbau HFB 320 Hansa Jet first flew on 21 April 1964, powered by two General Electric CJ610, 47 were built between 1965 and 1973. The joint Piaggo-Douglas, 18,000 pounds (8.2 t) MOTW Piaggio PD.808 first flew on 29 August 1964, powered by two Armstrong Siddeley Vipers, 24 were built for the Italian Air Force.