The Indo-Czech pair will take on Austria-Brazil pair of Alexander Peya and Bruno Soares in the US Open men's doubles final.
Earlier, Paes and Stepanek ended Bob and Mike Bryan's chances of winning the calendar-year grand slam with their three-set win in the semi-finals.
40-year-old, tennis maestro, Paes will be chasing his third US Open doubles title and eighth major of his career.
Paes will be chasing his third US Open doubles title and 8th major of his career
Paes will be playing his seventh men's doubles final at US Open, winning twice and lost four so far.
Overall, this will be his 16th Grand Slam men's doubles final. He also owns six Grand Slam mixed doubles titles from 14 finals.
Leander Paes at US Open:
1999: Paes & Mahesh Bhupathi lost to Lareau & O'Brien
2004: Paes & David Rikl lost to Mark Knowles & Daniel Nestor
2006: Paes & Martin Damm bt Jonas Bjorkman & Max Mirnyi
2008: Paes & Lukas Dlouhy lost to Bob & Mike Bryan
2009: Paes & Dlouhy bt Bhupathi & Knowles
2012: Paes & Radek Stepanek lost to Bryan brothers.
(with agency inputs)