Paszek upset the fourth-seeded Bartoli 4-6, 7-5, 6-4 in a match that took more than 3 hours. Paszek had at least two breaks in each set. She dropped just eight points in serve in the third set -- even though Bartoli had a break -- in earning a spot in a WTA final for the fourth time.
Kerber made short work of Klara Zakopalova in a 6-0, 6-3 win in her 59-minute semifinal. She won 64 percent of the points in the match after taking nearly 70 percent in the opening set.
Kerber is also in her fourth tournament title match. She picked up her first two championships earlier this year. Paszek will be in her first final since September 2010 when she won the second or her two WTA championships.
Saturday's match will mark the first career meeting between Kerber and Paszek.
The AEGON International champion will take home $107,000, with $57,000 going to the runner-up. Bartoli and Zakopalova each earned $35,500 as semifinalists.