Charter, also called air taxi or ad-hoc flights require certification from the associated country's regulating body such as the FAA in the U.S. The regulations are differentiated from typical commercial/passenger service by offering a non-scheduled service. In the U.S. these flights are regulated under FAA Part 135. There are some cases where a charter operator can sell scheduled flights, but only in limited quantities.
Aircraft leases are often used by private aircraft operators, as leases provide the same level of access to an aircraft that ownership provides, without the capital expenditure buying a business jet requires. Leases are offered in two main forms: wet leasing, normally used for short-term access; and dry leasing, typically used for longer term leases. Under wet leases, flight crews are provided in tandem with the aircraft, while operators of dry leased aircraft supply their own crews. Combination wet-dry leases may also be offered, as when an aircraft is wet leased to establish service, and once an in-house flight crew is trained, switched to a dry lease.
JetSuite is one of several private aviation companies attempting to make private jet flying accessible to travelers who aren’t part of the billionaire or even millionaire set. In many cases, these companies such as Blade and JetSmarter, are able to offer flights at appealing prices because the trips are shared with a small group of other passengers. While this may not be private flying in the vein of having an entire plane to yourself, travelers fly in and out of small, private airports where they usually don’t have to deal with the Transportation Security Administration and can arrive just five to 15 minutes before their departure time.
the 99,500 lb (45,100 kg), 6,000 nmi Bombardier Global 6000 is the platform for the USAF Northrop Grumman E-11A Battlefield Airborne Communications Node, the radar-carrying ground-surveillance Raytheon Sentinel for the UK Royal Air Force, and Saab’s Globaleye AEW&C carrying its Erieye AESA radar as UK's Marshall ADG basis for Elint/Sigint for the United Arab Emirates; it is also the base for the proposed Saab AB Swordfish MPA and the USAF Lockheed Martin J-Stars Recap battlefield-surveillance program, while IAI's ELI-3360 MPA is based on the Global 5000;
Though the early Lockheed Jetstar had four, most production business jets have two jet engines, mostly rear-mounted podded engine. If mounted below their low wing, it wouldn't allow sufficient engine clearance without a too long landing gear. The HondaJet is the exception with its over the wing engine pods. Dassault Falcon still builds three-engine models derived from the Falcon 50, and the very light jet market has seen several single-engine design concepts and the introduction of the Cirrus Vision SF50 in 2016.