Traveling at Mach 10 (ten times the speed of sound, or approximately 12,348 km/h or 7,673 mph), the flight from London to New York would take roughly 27 minutes. The great circle distance between London (LHR) and New York (JFK) is approximately 5,570 kilometers (3,460 miles). At Mach 10, you are traveling at about 205 kilometers per minute. While the math suggests a sub-30-minute journey, in a real-world 2026 "hypersonic" scenario, the total travel time would be longer—likely closer to 45 to 60 minutes—to account for the gradual acceleration phase required to prevent the passengers from experiencing lethal G-forces and a prolonged deceleration phase. Additionally, the aircraft would need to fly much higher in the atmosphere to minimize aerodynamic heating. While Mach 10 remains in the realm of experimental "Scramjet" technology and high-speed missiles in 2026, these theoretical calculations illustrate why hypersonic travel is considered the "final frontier" for global connectivity, potentially making an Atlantic crossing feel like a short commute.