Fourth seeds Paes and Hingis were in top form as they staved off a tough challenge from the second-seeded pair of Rohan Bopanna and Yung-Jan Chan of Chinese Taipei 6-2, 7-5.
Both the teams served four aces each but the Bopanna-Chan combine suffered on the unforced errors count, which was 12 as compared to 9 from Paes and Hingis.
The Indo-Swiss pair will now face the US duo of Bethanie Mattek-Sands and Sam Querrey.
Paes, Mirza in US Open finals