Zipline says quieter flight software is now on its whole fleet

Zipline said on 27 October 2026 that sound-optimized dynamic flying is now on its whole delivery fleet, and that the change plus other hardware and software work cut modeled sound exposure per flight by 68 percent and peak volume by 24 percent versus its 2025 fleet. It also said flights are 53 seconds shorter on average, use 21 percent less energy, and that the fleet has flown nearly 150 million commercial autonomous miles. Those figures are the company's own modeling and counts; Aerospace Testing International reported them on 28 October without an independent measurement.