Kosmos 265 was operated in an orbit with a perigee of 261 kilometres (162 mi), an apogee of 413 kilometres (257 mi), 70.9 degrees of inclination, and an orbital period of 91.3 minutes. It remained in orbit until it decayed and reentered the atmosphere on 1 May 1969. It was the eighteenth of seventy nine DS-P1-Yu satellites to be launched, and the seventeenth of seventy two to successfully reach orbit.
Payloads are separated by bullets ( · ), launches by pipes ( | ). Manned flights are indicated in bold text. Uncatalogued launch failures are listed in italics. Payloads deployed from other spacecraft are denoted in brackets.