After finishing sixth in the opening round at Lake Placid a week earlier, Chaffer performed consistently over her two runs down the 1.34 kilometre course to finish in eighth place.
Her times were just five one hundredths of a second different from run one to run two, leaving the West Australian happy with her performance.
"My first run was nice until corner 11 and then I came unstuck a little," Chaffer said, "but luckily I could move up a few spots on the second run.
"Overall I'm happy with the result, but I know that I did not slide my best, so there is lots to improve on."
Chaffer's fellow Australian Institute of Sport scholarship holder, Melissa Hoar, continued her solid form with a 13th place finish in Park City.
At the head of the field, the USA's Katie Uhlaender took a thrilling 0.01 second victory over Great Britain's Elizabeth Yarnold, with German Anja Huber in third place.
In the Women's Bobsleigh, Australian pair Astrid Radjenovic and Fiona Harrison, finished 14th and are now 19th in the World Cup.
The FIBT Skeleton World Cup tour moves to Whistler, Canada, for round three next weekend.