How fast does an f15 having to be flying to create a sonic boom?
The F15 needs to be flying faster than the speed of sound, which is approximately 768 miles per hour (1236 kilometers per hour) at sea level or 1,125 feet per second (343 meters per second). So, the F15 would need to be flying faster than Mach 1, which is the speed of sound, to create a sonic boom.