Operated by SBST
| Direction | First bus (wkday) | Last bus | AM peak | AM off-peak | PM peak | PM off-peak |
|---|---|---|---|---|---|---|
| Fernvale Stn/Blk 439A → Sengkang Int | 06:00 | 10:00 | 2–3 min | 3–4 min | — | — |
First/last bus are at the origin stop, weekdays. Frequencies are LTA's scheduled ranges in minutes.