Portal:Spaceflight/On This Day/4 September
- 1981 - A Soyuz-U launches the Kosmos 1303 satellite.
- 1981 - A Kosmos-3M launches the Kosmos 1304 satellite.
- 1982 - A Tsyklon-2 launches the Kosmos 1405 satellite.
- 1984 - A Soyuz-U launches the Kosmos 1592 satellite.
- 1984 - A Proton-K launches there GLONASS satellites.
- 1985 - A Kosmos-3M launches the Kosmos 1680 satellite.
- 1989 - A Titan 34D launches two DSCS satellites.
- 1996 - A Zenit-2 launches the Kosmos 2333 satellite.
- 1997 - An Atlas IIAS launches the GE-3 satellite.
- 1999 - An Ariane 4 launches the Koreasat-3 satellite.
- 2010 - A Long March 3B launches the ChinaSat 6A satellite.