(Okay, we'll try to stop saying Benjamin.) For the results, Kayak looked at both domestic and international round-trip flights in economy class; evaluating search dates between July 1, 2016 and June 30, 2017 for travel dates in that same period. Of course, What are the cheapest days to fly? is a complicated question.
A Russian Soyuz capsule usually takes at least two days to rendezvous with the ISS, because of the carefully timed dance of manoeuvres that must take place for a spaceship to safely meet the orbiting laboratory. Using a new launch process, three astronauts have now made the trip in just under 6 hours.
1 As of 2013, there has been 174 spacewalks outside the modules in support of the ISS's construction and maintenance, that's almost 1,100 hours (nearly 46 days). 2  There's been 38 expeditions to the ISS as of 2013. An expedition can last up to six months.