Launch from Baikonur; landing 87 km northeast of Arkalyk.

Docking with US-Apollo-spacecraft ASTP at 17.07.1975; docking time 52 hours. It was the first docking of two spacecrafts, launched from different nations. The crewmembers rotated between both spacecrafts and perfomed material experiments. After separation second short-time docking with Soyuz 19 as the active part but no more crew transfer. After final separating the crew performed several experiments including solar and earth photography.

The landing was without any problems, only 6 km far from its aim point.