The record for the most time in space

This guy is well over the two year mark.

Krikalev was the Commander of Expedition-11 which launched from the Baikonur Cosmodrome in Kazakhstan on April 14, 2005 aboard Soyuz and docked with the ISS on April 16, 2005. Following 8-days of joint operations and handover briefings, they replaced the Expedition-10 crew who returned to earth aboard Soyuz. During their six-month stay aboard the station the crew continued station maintenance, worked with scientific experiments, and performed a spacewalk in Russian spacesuits from the Pirs Airlock. The Expedition-11 crew in their Soyuz spacecraft landed in the steppes of Kazakhstan on October 10, 2005. In completing this mission Krikalev logged 179 days and 23 minutes in space including an EVA totaling 4 hours and 58 minutes.

In completing his sixth space flight, Krikalev logged a total of 803 days, 9 hours and 39 minutes in space, including eight EVA's.