The Polish world No. 1 saw off the 20-year-old American 6-4, 6-4 in their quarterfinal clash on Friday.
The Polish player will now face either home favourite Tereza Martincová or Russia's Ekaterina Alexandrova for a place in the championship match.
Świątek last month won the US Open, claiming her seventh title this year.
The 21-year-old, coached by countryman Tomasz Wiktorowski, in early April took over as the new number one in women's tennis, becoming the first Pole to top the world rankings.
(gs)
Source: IAR, PAP