X4 Merthyr Bus St Arr ↔ Cardiff Greyfriars Road Stop GJ
Operated by Stagecoach South Wales. First bus 06:31, last bus 18:25. 22 journeys on weekdays.
💷 The England fare cap doesn't apply in Wales — Stagecoach South Wales sets the fares on the X4. Check their website or the Traveline Cymru fare finder for current prices. Who travels free →
Timetable
Times are shown at the route's main timing stops — buses serve all stops in between. For times at your exact stop, open the stop's own page.
towards Cardiff Greyfriars Road Stop GJ · Monday to Friday towards Cardiff Greyfriars Road Stop GJ · Saturday towards Merthyr Bus St Arr · Monday to Friday towards Merthyr Bus St Arr · Saturday
| Merthyr Bus Station 8 | 06:31 | 07:21 | 08:31 | 09:33 | 10:33 | 11:33 | 12:33 | 13:33 | 14:45 | 16:00 | 17:15 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Pontypridd Bus Station Stand 8 | 06:54 | 07:45 | 08:57 | 09:57 | 10:57 | 11:57 | 12:57 | 13:57 | 15:09 | 16:26 | 17:41 |
| Day Centre (before) | 07:06 | 07:58 | 09:10 | 10:09 | 11:09 | 12:09 | 13:09 | 14:09 | 15:21 | 16:39 | 17:53 |
| Greyfriars Road GJ | 07:31 | 08:34 | 09:36 | 10:34 | 11:34 | 12:34 | 13:34 | 14:34 | 15:49 | 17:09 | 18:19 |
Route map
All stops on route X4
X4 towards Cardiff Greyfriars Road Stop GJ
- Merthyr Bus Station 8 Merthyr Tydfil
- Warlow Street (after) Merthyr Tydfil
- Castle Bingo (nr Aldi) Merthyr Tydfil
- Mardy (nr) Merthyr Tydfil
- Gladstone Terrace (o/s 16) Merthyr Tydfil
- Evans Halshaw (o/s) Merthyr Tydfil
- Hoovers Top Gate (after) Pentrebach
- Hoovers Main Gate (after) Pentrebach
- Pontypridd Bus Station Stand 8 Pontypridd
- Ynysangharad Park Gates (o/s) Pontypridd
- Catherine Street E2 Pontypridd
- Roundabout (after) Upper Boat
- Pottery (before) Treforest Industrial Estate
- Day Centre (before) Treforest Industrial Estate
- Trefforest Estate Offices (nr) Treforest Industrial Estate
- Oxford Street (o/s 39) Nantgarw
- Cross Keys Inn (nr) Nantgarw
- Caedelyn Road (after) Whitchurch
- Tyn y Parc Road (after) Whitchurch
- Heol Nest (after) Whitchurch
- Manor Rise (before) Whitchurch
- Cross Inn (before) Birchgrove
- Pantbach Place (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
- Greyfriars Road GJ Cardiff
- Law Courts RJ (o/s) Cathays Park
X4 towards Merthyr Bus St Arr
- Greyfriars Road GJ Cardiff
- Corbett Road (before) Cathays Park
- Blackweir (o/s) Blackweir
- Maindy Stadium (opp) Maindy
- Parkfield Place (after) Maindy
- North Road Clinic (o/s) Gabalfa
- Manor Way (o/s 15) The Philog
- Westfield Road (after) Whitchurch
- Manor Rise (after) Whitchurch
- High School (o/s) Whitchurch
- Heol y Forlan (before) Whitchurch
- Tyn y Parc Road (before) Whitchurch
- Brocastle Road (after) Whitchurch
- Cross Keys Inn (nr) Nantgarw
- Oxford Street (opp 47) Nantgarw
- Day Centre (o/s) Treforest Industrial Estate
- Honeywell`s (nr) Treforest Industrial Estate
- Pottery (after) Treforest Industrial Estate
- Roundabout (before) Upper Boat
- Pontypridd Bus Station Stand 5 Pontypridd
- Ynysangharad Park Gates (o/s) Pontypridd
- Hoovers Sports (o/s) Pentrebach
- Hoovers Top Gate (before) Pentrebach
- Hoovers Main Gate (after) Pentrebach
- Mardy (nr) Merthyr Tydfil
- Mardy Terrace (o/s 6) Merthyr Tydfil
- Evans Halshaw (opp) Merthyr Tydfil
- Warlow Street (before) Merthyr Tydfil
- Castle Bingo (nr) Merthyr Tydfil
- Merthyr Tydfil College (nr) Merthyr Tydfil
- Merthyr Bus Station 1 Merthyr Tydfil
Service history & registered changes
- 🆕 Registered effective 1 Sept 2026 Operating between Lancaster Railway Station and Lancaster University given service number X4 / 4 effective from 01 September 2026. To amend Stopping Places.
- 🆕 Registered effective 19 Jul 2026 Operating between Corby, George Street and Peterborough, Queensgate Bus Station given service number X4 effective from 19 July 2026. To amend Timetable.
- 🆕 Registered effective 19 Jul 2026 Operating between Northampton Bus Interchange and Corby George Street given service number X4 effective from 19 July 2026. To amend Stopping Places and Timetable.
- 🆕 Registered effective 31 May 2026 Operating between Corby and Peterborough given service number X4 effective from 31 May 2026. To amend Route and Timetable.
From official Traffic Commissioner registrations. All service changes →
Towns & areas on this route
CardiffMerthyr TydfilPontypriddWhitchurchGabalfaBirchgrovePentrebachNantgarwCathays ParkMaindyTreforest Industrial EstateUpper Boat
Frequently asked questions
What time is the first X4 bus?
The first X4 departure on weekdays leaves at 06:31 (check the full timetable below for your stop, as times vary along the route — weekend times can differ).
What time is the last X4 bus?
The last X4 on weekdays leaves its first stop at 18:25. Always check the timetable for your specific stop — later stops are reached after this time.
How much does the X4 bus cost?
The England fare cap doesn't apply in Wales — Stagecoach South Wales sets the fares on the X4. Check their website or the Traveline Cymru fare finder for current prices.
Who runs the X4 bus?
The X4 is operated by Stagecoach South Wales.
Timetable data from the operator via the DfT Bus Open Data Service. Check before you travel — services can change at short notice.