As of early 2026, the Bombardier Global 8000 is the fastest civilian business jet in the world, boasting a top speed of Mach 0.94 (approx. 721 mph). It recently broke the sound barrier during testing, making it the first transcontinental ultra-high-speed cruise jet since the Concorde. For a civilian with a "need for speed," this aircraft allows you to fly from London to Perth in record time. If you mean "fly" as a pilot, the Cessna Citation X+ remains a popular second-place contender with a top speed of Mach 0.935. For those who want a "fighter pilot" experience, companies in 2026 offer civilian flights in L-39 Albatros or MiG-29 jets, where you can reach supersonic speeds as a passenger. The Global 8000 is the premier choice for 2026 "time-hackers," offering a high-altitude "smooth-flex" wing that dampens turbulence while traveling at nearly the speed of sound, making it the undisputed king of fast, private global travel.