How far did Rosetta stone spacecraft travelrosetta?

The Rosetta spacecraft traveled approximately 6.4 billion kilometers (about 4 billion miles) during its journey to comet 67P/Churyumov-Gerasimenko. Launched in 2004, it used gravity assists from Earth and Mars to reach its destination, arriving at the comet in August 2014 after a decade-long voyage. Rosetta's mission included orbiting the comet and deploying the Philae lander to study its surface and composition.