Portal:Spaceflight/On This Day/18 September
- 1959 - A Vanguard launches the Vanguard 3 satellite.
- 1962 - A Thor-Delta launches the Tiros 6 satellite.
- 1964 - A Saturn I launches Apollo test flight A-102.
- 1965 - A Kosmos-1 launches five satellites.
- 1968 - A Thorad-Agena launches a CORONA satellite.
- 1968 - Zond 5 flies past the Moon, carrying a number of animals which are later safely recovered.
- 1969 - A Voskhod launches the Kosmos 299 satellite.
- 1973 - A Feng Bao 1 fails to launch the JSSW satellite.
- 1975 - A Vostok-2M launches a Meteor satellite.
- 1977 - A Tsyklon-2 launches the Kosmos 954 satellite.
- 1980 - A Soyuz-U launches the manned Soyuz 38 mission.
- 1981 - A Kosmos-3M launches the Kosmos 1308 satellite.
- 1981 - A Soyuz-U launches the Kosmos 1309 satellite.
- 1982 - A Soyuz-U launches the Progress 15 spacecraft to resupply Salyut 7.
- 2002 - An Atlas IIAS launches the Hispasat 1D satellite.
- 2006 - A Soyuz-FG launches the manned Soyuz TMA-9 mission, carrying Anousheh Ansari, the first Iranian in space, and first female space tourist.
- 2007 - A Delta II launches the WorldView-1 satellite.
- 2011 - A Long March 3B launches the ChinaSat-1A satellite.
- 2012 - A Long March 3B launches the Beidou-2 M5 and M6 satellites for the Chinese Beidou Navigation Satellite System.
- 2013 - An Atlas V launches the USA-246 military communication satellite for the AEHF system.
- 2013 - An Antares launches Cygnus Orb-D1, the first Cygnus commercial logistics spacecraft to the ISS.