The future of aviation is currently splitting into two high-speed paths: Supersonic and Hypersonic travel. Several companies, most notably Boom Supersonic with its "Overture" jet, are working to return supersonic flight to the masses by 2030, with target speeds of Mach 1.7 (about 1,300 mph). This would cut a flight from New York to London down to roughly 3.5 hours. Looking further ahead into the mid-2030s and 2040s, researchers are exploring hypersonic flight, which exceeds Mach 5 (over 3,800 mph). At these speeds, aircraft would travel through the upper atmosphere, allowing for "anywhere to anywhere" travel in under two hours. However, the speed of future "standard" commercial flight is actually trending toward being slower or remaining constant as airlines prioritize fuel efficiency and sustainability over raw velocity. The next generation of narrow-body jets will likely maintain current speeds of 500–600 mph but utilize "Open Fan" engine technology or hydrogen propulsion to reach net-zero emissions, proving that in 2026, "green" is often the new "fast."