The program was responsible for sending into space the first citizen of a country other than the US or USSR: Vladimír Remek of Czechoslovakia.

Of the countries involved, only Bulgaria sent two cosmonauts to space, although the second one did not fly under the Interkosmos program, and the French spationaut Jean-Loup Chrétien flew on two flights.

[8] The Soviet Union also made offers of joint human spaceflight on a commercial basis to the United Kingdom and Japan, resulting in the first British and Japanese cosmonauts.

In the early 1980s, an offer was made to Finland as well, with test pilot Jyrki Laukkanen mentioned as one of the potential Finnish cosmonauts.

[citation needed] The two exceptions include (largely fictionalised) Interkosmos from 2006, and cooperation document from 2009 (in Polish) titled Lotnicy Kosmonauci ("Aviators-Cosmonauts").