Who owns the planes that are used for jet card programs come from three sources: Fractional Fleets: NetJets, Flexjet, and Airshare, for example, tap into fractional fleets they manage and operate on behalf of fractional shareowners. Owned/Leased Fleets: Nicholas Air, VistaJet, and FlyExclusive are examples of jet card companies that own or lease their own fleets. Managed Fleets: Solairus, Jet Aviation, and Jet Linx manage and operate jets on behalf of individual owners who allow them to use those aircraft to fulfill jet card flights when they aren't flying on them. Jet card brokers like Sentient Jet, Magellan Jets, and Private Jet Services (PJS) Group don't operate aircraft. They go out into the market to source jets for your flights. Brokers each have their own standards of sourcing. Some have what they call open fleets - a set of operators who meet their standards, and they use them exclusively. Each business model has its advantages, depending on your needs. However, all operators carrying passengers on private jet charter flights for jet cards have to meet minimum government standards in the U.S., referred to as Part 135. Even if you buy a jet card with an operator, there is a chance a third-party operator will fly your trip if your provider doesn't have your contracted type of aircraft available.