Safarova held serve eight times in her 6-4, 6-3 victory over the sixth-seeded Erakovic of New Zealand, competing the win in 1 hour, 29 minutes.
It was the left-handed Czech's first win in five years.
Erakovic, appearing in her second Quebec final in three years, fell to 1-3 in career in WTA finals.
Benedict Cumberbatch's dramatic reading of R. Kelly lyrics is just what you need
Beyonce flaunts bikini body, Blue Ivy in vacation pics