List of X-1 flights
The Bell X-1 was the first crewed airplane to exceed the speed of sound in level flight and was the first of the X-planes.
XS-1 pilots
| Pilot | Agency | Flights | Aircraft |
| Joseph Cannon | Bell Aircraft | 1 | 46-064 |
| Chalmers "Slick" Goodlin | Bell Aircraft | 26 | 46-062, 46-063 |
| Alvin "Tex" Johnston | Bell Aircraft | 1 | 46-063 |
| Jack Woolams | Bell Aircraft | 10 | 46-062 |
| Robert Champine | NACA | 13 | 46-063 |
| Scott Crossfield | NACA | 10 | 46-063 |
| John H. Griffith | NACA | 9 | 46-063 |
| Herb Hoover | NACA | 14 | 46-063 |
| Howard Lilly | NACA | 6 | 46-063 |
| Joseph A. Walker | NACA | 2 | 46-063 |
| Fred Ascani | USAF | 1 | 46-063 |
| Albert Boyd | USAF | 1 | 46-062 |
| Frank Everest | USAF | 10 | 46-062 |
| James Fitzgerald | USAF | 7 | 46-062 |
| Patrick Fleming | USAF | 1 | 46-062 |
| Richard Johnson | USAF | 1 | 46-062 |
| Gustav Lundquist | USAF | 6 | 46-062 |
| Jack Ridley | USAF | 5 | 46-062 |
| Chuck Yeager | USAF | 34 | 46-062, 46-063 |