21 bus: Cardiff Bus Station – Rhiwbina (circular)
Cardiff Bus bus 21 is a circular service around Cardiff Bus Station via Birchgrove, Rhiwbina, Whitchurch and Maindy. Runs every day. On Tuesday 3 November the first bus from Birchgrove leaves at 06:40 and the last at 21:35, about every 30 minutes during the day.
Operated by Cardiff Bus. Timetable for Tuesday, 3 November 2026. Plan a journey · Print this timetable
Questions
- When is the first and last 21 bus around Cardiff Bus Station?
- On Tuesday 3 November the first bus leaves Cardiff Bus Station at 06:40 and the last at 21:35, 27 journeys in all.
- Does the 21 bus run on Sundays?
- Yes. Runs every day.
- How often does the 21 bus run?
- On Tuesday 3 November it runs about every 30 minutes during the day (09:00 to 15:00), 27 journeys from Birchgrove.
- Where does the 21 bus stop?
- Main stops: Cardiff Bus Interchange Bay 4 (Cardiff Bus Station), Birchgrove 1 (Birchgrove), Rhiwbina Station (Rhiwbina), Three Elms (Whitchurch), Cathays High School (Maindy). The full list is in the timetable below.
- Who runs the 21 bus?
- Cardiff Bus.
Towards Cardiff Bus Station
| Stop | Journey 1 | Journey 2 | Journey 3 | Journey 4 | Journey 5 | Journey 6 | Journey 7 | Journey 8 | Journey 9 | Journey 10 | Journey 11 | Journey 12 | Journey 13 | Journey 14 | Journey 15 | Journey 16 | Journey 17 | Journey 18 | Journey 19 | Journey 20 | Journey 21 | Journey 22 | Journey 23 | Journey 24 | Journey 25 | Journey 26 | Journey 27 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cardiff Bus Interchange Bay 4, Cardiff Bus Station | 07:00 | 07:27 | 08:10 | 08:45 | 09:15 | 09:45 | 10:15 | 10:45 | 11:15 | 11:45 | 12:15 | 12:45 | 13:15 | 13:45 | 14:15 | 14:45 | 15:15 | 15:50 | 16:20 | 16:50 | 17:25 | 17:55 | 18:40 | 19:35 | 20:35 | 21:35 | |
| Birchgrove 1 | 06:40 | 07:13 | 07:43 | 08:28 | 09:00 | 09:30 | 10:00 | 10:30 | 11:00 | 11:30 | 12:00 | 12:30 | 13:00 | 13:30 | 14:00 | 14:34 | 15:04 | 15:34 | 16:09 | 16:39 | 17:09 | 17:44 | 18:14 | 18:58 | 19:52 | 20:50 | 21:50 |
| Rhiwbina Station | 06:44 | 07:18 | 07:49 | 08:34 | 09:07 | 09:37 | 10:07 | 10:37 | 11:07 | 11:37 | 12:07 | 12:37 | 13:07 | 13:37 | 14:07 | 14:40 | 15:10 | 15:40 | 16:15 | 16:45 | 17:15 | 17:50 | 18:20 | 19:03 | 19:57 | 20:54 | 21:54 |
| Three Elms, Whitchurch | 07:06 | 07:44 | 08:23 | 09:04 | 09:32 | 10:02 | 10:32 | 11:02 | 11:32 | 12:02 | 12:32 | 13:02 | 13:32 | 14:02 | 14:32 | 15:05 | 15:36 | 16:06 | 16:41 | 17:11 | 17:41 | 18:16 | 18:46 | 19:25 | 20:18 | 21:13 | 22:13 |
| Cathays High School, Maindy | 07:14 | 07:53 | 08:35 | 09:12 | 09:40 | 10:10 | 10:40 | 11:10 | 11:40 | 12:10 | 12:40 | 13:10 | 13:40 | 14:10 | 14:40 | 15:12 | 15:45 | 16:15 | 16:50 | 17:20 | 17:50 | 18:25 | 18:55 | 19:33 | 20:26 | 21:20 | 22:20 |
| Cardiff Bus Interchange Bay 4, Cardiff Bus Station | 07:24 | 08:03 | 08:50 | 09:27 | 09:55 | 10:25 | 10:55 | 11:25 | 11:55 | 12:25 | 12:55 | 13:25 | 13:55 | 14:25 | 14:55 | 15:27 | 16:00 | 16:30 | 17:05 | 17:35 | 18:05 | 18:40 | 19:10 | 19:48 | 20:36 | 21:30 | 22:30 |
Places on this route
Timetables from the Bus Open Data Service (Department for Transport), updated Tuesday, 3 November 2026. Stop details from NaPTAN. Train timetables contain data from Network Rail, licensed under the Open Government Licence; live train times from National Rail. Times are UK local time and can change at short notice: check before you travel.
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