Ferrer, seeded sixth, schooled Benneteau as the Frenchman played in his first semi-final at the elite Masters 1000 level.
He needed just 71 minutes to seal the victory and give himself a shot at adding a second title of 2014 to the trophy he lifted in Buenos Aires.
Ferrer will aim for his 22nd career trophy when he faces off on Sunday against either second-seeded Roger Federer or Canadian Milos Raonic, the fifth seed.
"But as they lost, I took my chance and got into the final. I'm trying to improve my game every day."
- Sports & Recreation
- David Ferrer
- Julien Benneteau
- Cincinnati Masters
- Roger Federer