The rollout of a new Soyuz rocket in March 2013 allowed Russia to cut travel time to the orbiting lab from two days travel in cramped quarters to just six hours.
The next manned mission to the ISS is due to blast off from the Russia-leased launch pad in Kazakhstan on September 2, carrying a Russian, a Kazakh, and a Dane.
Nasa earlier this month extended its contract with Russia's space agency for $490 million (roughly Rs. 3,124 crores) to carry US astronauts to the International Space Station amid a lack of Congressional funding. The United States has been dependent on Russia for ISS access since it ended its space shuttle program in July 2012.
The United States will continue to rely exclusively on Russia to take astronauts to the orbiting outpost under the new contract, which runs until 2019, even as relations between the two countries have reached their lowest point since the Cold War.