The S Line is a bus line that services Holmes and Harper Junior High Schools, and only runs when DJUSD is in session. It travels from Mace Boulevard and Chiles Road, through the depths of South Davis and El Macero, to Holmes JHS, and finally to Harper JHS. The 2nd morning run also serves Davis High School.

This line runs twice in the mornings, and only once during the afternoons.

The route map and schedule is available in PDF (link) or check out the schedule and route map at the Unitrans website for more information.