NASA’s X-59 Flies Supersonic. NASA
NASA’s X-59 quiet supersonic aircraft has completed its first flight faster than the speed of sound on June 5, 2026, an important milestone for NASA’s Quesst mission.
This achievement marks the first time the experimental aircraft has entered the supersonic phase of testing, bringing the program one step closer to its goal of making quieter supersonic flight possible.
Although the cockpit display showed a speed of Mach 1.07, the aircraft was actually flying at about Mach 1.0. The difference was caused by calibration settings that currently make the displayed speed slightly higher than the true speed. NASA will continue refining the system as testing progresses and the aircraft flies at higher speeds.
NASA’s X-59 Flies Supersonic. NASA
The flight is a major step forward as the X-59 expands its testing envelope and prepares for future missions designed to demonstrate low-noise supersonic travel.
Why it matters:
The X-59 is designed to solve one of the biggest challenges of supersonic flight—the loud sonic boom. By creating a much quieter “sonic thump,” the aircraft could help make commercial supersonic travel over land possible again. This first supersonic flight proves the aircraft can safely operate at these speeds and moves NASA closer to gathering the data needed to shape future aviation regulations and potentially enable faster passenger flights around the world.
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