A United Launch Alliance (ULA) Atlas V 551 rocket, configured with five side-mounted solid rocket boosters and a medium-length payload fairing, launched the Kuiper 3 [KA-03] mission consisting of 27 Project Kuiper satellites from Space Launch Complex-41 at Cape Canaveral Space Force Station at 8:09 a.m. on 25 September 2025. This mission brings the total Project Kuiper spacecraft deployed to 129 satellites.

United Launch Alliance will deploy the satellites at an altitude of 280 miles (450 kilometers) above Earth, at which point the Project Kuiper team will take over command of the mission from their 24/7 mission operations center in Redmond, Washington, confirm satellite health, and ultimately raise the satellites to their assigned orbit of 392 miles (630 km) above Earth.

This launch continues a new chapter in the commercial launch industry as Amazon partners with ULA to deploy a majority of its advanced satellite constellation using eight Atlas V and 38 Vulcan rockets in accordance with the world's largest commercial launch agreement.