Denise Marie Woodrum, 51, was arrested at Sydney Airport last year after border officials found cocaine stuffed inside high heels and other belongings in her luggage.
In January, she pleaded guilty to the illegal import but told the court she was a victim of an online romance scam.
A judge found she had willingly participated in the operation.
On Thursday, the New South Wales District Court sentenced Woodrum, from Missouri, to a maximum of seven-and-a-half years in jail.