A great deal of past research in reading fluency has focused on oral reading fluency in L1, but literature in EFL oral reading and silent reading is still in its infancy. This study attempts to examine the development of silent reading fluency in a speed reading course and aims to determine whether an improvement in silent reading speed facilitates oral reading fluency development. The participants were from four intact classes at a university in Vietnam. While the four groups were following the usual English program at the university, the two treatment groups were also following a speed reading course, which lasted two months. In each session of the course, they were asked to read a 550-word text and answered 10 comprehension questions that accompanied the text. The results indicated that the treatment groups significantly improved their reading fluency in and outside the speed reading course, but made minimal increases in oral reading speed.