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21
Cardiff Bus

21 bus timetable: Cardiff Bus Interchange circular

Cardiff Bus Interchange circular

Mode Bus

Not the 21 you're looking for? 72 other bus routes in Great Britain use this number.

Cardiff Bus Interchange → Cardiff Bus Interchange

27 trips · first 06:40 · last 21:35
Mon–Fri Live Valid 2026-07-10 – 2027-05-12

Swipe sideways to see later trips.

Stop
06:40 Cardiff Bus Interchange
07:00 Cardiff Bus Interchange
07:27 Cardiff Bus Interchange
08:10 Cardiff Bus Interchange
08:45 Cardiff Bus Interchange
09:15 Cardiff Bus Interchange
09:45 Cardiff Bus Interchange
10:15 Cardiff Bus Interchange
10:45 Cardiff Bus Interchange
11:15 Cardiff Bus Interchange
11:45 Cardiff Bus Interchange
12:15 Cardiff Bus Interchange
12:45 Cardiff Bus Interchange
13:15 Cardiff Bus Interchange
13:45 Cardiff Bus Interchange
14:15 Cardiff Bus Interchange
14:45 Cardiff Bus Interchange
15:15 Cardiff Bus Interchange
15:50 Cardiff Bus Interchange
16:20 Cardiff Bus Interchange
16:50 Cardiff Bus Interchange
17:25 Cardiff Bus Interchange
17:55 Cardiff Bus Interchange
18:40 Cardiff Bus Interchange
19:35 Cardiff Bus Interchange
20:35 Cardiff Bus Interchange
21:35 Cardiff Bus Interchange
Cardiff Bus Station, Cardiff Bus Interchange Bay 4
07:24
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 Stop 1 outside 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
Whitchurch, Three Elms opposite
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
Maindy, Cathays High School outside
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 Station, Cardiff Bus Interchange Bay 4
·
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

Timetable data from Cardiff Bus, refreshed 2026-07-16 · Source: Traveline National Dataset (TNDS) · Service code S_21:21.

Main stops shown

6 main stops

The map can include more stops across directions; use All Stops above for the full timetable list.

  1. Cardiff Bus Station, Cardiff Bus Interchange Bay 4
  2. Birchgrove Stop 1 outside Principality
  3. Rhiwbina Station before
  4. Whitchurch, Three Elms opposite
  5. Maindy, Cathays High School outside
  6. Cardiff Bus Station, Cardiff Bus Interchange Bay 4

Looking for a different 21 bus?

72 other routes

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21
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Brighton · Brighton & Hove Bus and Coach Company
 21
Worksop Bus Station ↔ Doncaster Interchange B3
Worksop · Stagecoach East Midlands
 21
Southend, Travel Centre ↔ Canvey, Newlands, Creek Road
Leigh-on-Sea · First Essex
 21
Southend ↔ Canvey (Newlands, Creek Road )
South Benfleet · First Essex
 21
Barne Barton - Plympton via Devonport, City Centre, Chaddlewood
Plympton · Plymouth Citybus
 21
Swadlincote ↔ Burton
Swadlincote · Midland Classic
 21
Taunton ↔ Burnham on Sea
Bridgwater · First Devon and Cornwall
 21
Richard Huish College ↔ Rooks Bridge, Garage
Bridgwater · First Devon and Cornwall

See all 73 bus routes numbered 21