21 Cardiff circular via Rhiwbina, Whitchurch
Operated by Cardiff Bus. First bus 06:40, last bus 21:35. 27 journeys on weekdays. Fares: set by the operator — more.
Wanted a different 21? 59 other bus routes are numbered 21 elsewhere in the UK — see every 21 bus timetable by area.
| Stop | 06:40 | 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cardiff Bus Interchange Bay 4 | · | 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 (o/s Principality) | 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 (before) | 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 (opp) | 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 (o/s) | 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 | 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 |
Each column is one journey, headed by the time it sets off. A · means that journey does not stop there. Times are shown at the route's main timing stops — buses serve all stops in between. Switch a table to All stops for every stop it calls at, or open a stop's own page for live departures there.
Christmas & bank holidays
These dates are not the usual timetable for the day they fall on. They come from the operator’s published data, which for Christmas and New Year is often late or incomplete, so check with Cardiff Bus before you travel. Everything above is an ordinary week.
- Christmas Day — Friday, 25 December 2026 The operator’s data lists more buses on this date than on an ordinary Friday (43 journeys, against 27), which usually means two timetables have been added together by mistake. Check with Cardiff Bus before you travel.
- Boxing Day — Saturday, 26 December 2026 The operator’s data lists more buses on this date than on an ordinary Saturday (67 journeys, against 24), which usually means two timetables have been added together by mistake. Check with Cardiff Bus before you travel.
- New Year's Day — Friday, 1 January 2027 The operator’s data lists more buses on this date than on an ordinary Friday (43 journeys, against 27), which usually means two timetables have been added together by mistake. Check with Cardiff Bus before you travel.
Route map
All stops on route 21
21 towards Cardiff Bus Station
All 47 stops
- Cardiff Bus Interchange Bay 4 Cardiff Bus Station
- Westgate Street KN (o/s) Cardiff
- Kingsway GA (o/s) Cardiff Castle
- Corbett Road (before) Cathays Park
- Blackweir (o/s) Blackweir
- Maindy Stadium (opp) Maindy
- Parkfield Place (after) Maindy
- North Road Clinic (o/s) Gabalfa
- Cross Inn (before) Birchgrove
- Birchgrove 1 (o/s Principality) Birchgrove
- Pantbach Avenue (after) Birchgrove
- Welwyn Road (before) Birchgrove
- Kyle Avenue (before) Birchgrove
- Rhiwbina Station (before) Rhiwbina
- Rhiwbina Shopping Centre (o/s) Rhiwbina
- Lon-y-Rhyd (after) Rhiwbina
- Heol y Deri (after) Rhiwbina
- Heol Nant Castan (before) Rhiwbina
- Heol Llanishen Fach (o/s 65) Rhiwbina
- Heol Uchaf Spar (before) Rhiwbina
- Heol Lewis (after) Rhiwbina
- Gron Ffordd (before) Rhiwbina
- Wenallt Road (before) Rhiwbina
- Lon Ysgubor (after) Rhiwbina
- The Deri (before) Rhiwbina
- Rhiwbina Hill (opp 52) Rhiwbina
- Caer Wenallt North (before) Pantmawr
- Caer Wenallt South (after) Pantmawr
- Heol Pant Y Rhyn (before) Coryton
- Hollybush Inn (before) Coryton
- Whitchurch Hospital (after) Whitchurch
- Whitchurch Library (opp) Whitchurch
- Plas y Llan (after) Whitchurch
- Merthyr Road Shops (o/s Opticians) Whitchurch
- Three Elms (opp) Whitchurch
- Ararat Church (after) Whitchurch
- The Philog (o/s 71) Whitchurch
- Cross Inn (before) Birchgrove
- St Josephs Convent (o/s former) Gabalfa
- Cathays High School (o/s) Maindy
- Blackweir (opp) Blackweir
- Rosemount (after) Blackweir
- College Road RK (o/s) Cathays Park
- Law Courts RJ (o/s) Cathays Park
- Kingsway GR (o/s) Cardiff Castle
- Westgate Street KG (o/s) Cardiff
- Cardiff Bus Interchange Bay 4 Cardiff Bus Station
Towns & areas on this route
Frequently asked questions
What time is the first 21 bus?
The first 21 departure on weekdays leaves at 06:40 (check the full timetable below for your stop, as times vary along the route — weekend times can differ).
What time is the last 21 bus?
The last 21 on weekdays leaves its first stop at 21:35. Always check the timetable for your specific stop — later stops are reached after this time.
How much does the 21 bus cost?
The England fare cap doesn't apply in Wales — Cardiff Bus sets the fares on the 21. Check their website or the Traveline Cymru fare finder for current prices.
Who runs the 21 bus?
The 21 is operated by Cardiff Bus.
Timetable data from Cardiff Bus via the DfT Bus Open Data Service (Wales feed). Check before you travel — services can change at short notice.