Russia's Yuri Gagarin Cosmonaut Training Centre has emerged as a prospective customer for the Sukhoi Superjet 100 and Tupolev 204.
A spokesman for the centre says it plans to acquire three specially-configured Superjets and three units of the Tu-204-300 or Tu-214.
"We'll deploy Superjets on transport services to Baikonur and Vostochny space launching sites, as well as use them to train cosmonauts in piloting skills," he explains.
"The Tupolevs will serve as tools for teaching trainees the Earth observation and photographic techniques. Hence we'd like their airframes to have additional windows."
The cosmonaut training centre has begun negotiations with the aerospace agency Roscosmos and United Aircraft, with a view to receiving the aircraft some time after 2015.
The jets will likely replace its fleet of special-purpose Tu-134s and Tu-154s. The spokesman says a longer-term plan envisages acquiring an Ilyushin Il-96 to replace the existing Il-76MDK, on which cosmonauts experience simulated weightlessness.