Even smaller private jets require two pilots. Safety risk is significantly higher when a single pilot flies an aircraft, so dual pilot operations are almost always mandatory. With two pilots, the workload is split thereby decreasing stress significantly.

Whether a private jet requires two pilots depends on the aircraft's specific FAA certification and the type of operation. Many smaller "Light Jets" and "Very Light Jets" (VLJs), such as the Cessna Citation Mustang, Embraer Phenom 100, and Pilatus PC-24, are certified for single-pilot operation, allowing an owner-pilot to fly solo. However, most mid-size and large-cabin private jets, including the Gulfstream, Bombardier Global, and Dassault Falcon series, are strictly certified for a minimum of two pilots due to their complexity, speed, and high-altitude capabilities. Furthermore, even if an aircraft is certified for one pilot, almost all commercial charter operators and reputable insurance companies mandate two pilots for safety. Having a co-pilot ensures that workload—such as radio communications, navigation, and emergency procedures—is shared, significantly reducing the risk of pilot fatigue or incapacitation. On ultra-long-haul international flights, a third "relief" pilot is often added to allow crew members to rotate and rest.