Garcia will seek her ninth career WTA title and second this year after winning the grass-court Bad Homburg Open.
The Frenchwoman, who a day earlier ended top-ranked Iga Swiatek's clay-court winning streak, broke her 10th-seeded Italian opponent four times to improve to 3-0 against her.
The former world No. 4 served six aces on a rainy day in Warsaw en route to her 17th win in her past 20 matches.
Bogdan reached her first career WTA final by defeating Kateryna Baindl of Ukraine 7-5, 7-5.
Garcia won their only previous encounter, beating the Romanian in the second round at Wimbledon in 2017.