X4 bus: Cardiff – Merthyr Tydfil
Stagecoach South Wales bus X4 runs between Merthyr Tydfil and Cardiff via Pontypridd and Treforest Industrial Estate. Runs Monday to Saturday. On Tuesday 10 November the first bus from Merthyr Tydfil leaves at 06:31 and the last at 17:15, about every hour during the day.
Operated by Stagecoach South Wales. Timetable for Tuesday, 10 November 2026. Today's timetable · any day up to 60 ahead: add ?date=YYYY-MM-DD to this page's address. Plan a journey · Print this timetable
Adult single £0.70 to £15.40, day ticket £6.80, weekly £17.90, monthly £63.10. From the operator's published fares; caps, passes and concessions can be cheaper.
Questions
- When is the first and last X4 bus from Merthyr Tydfil to Cardiff?
- On Tuesday 10 November the first bus leaves Merthyr Tydfil at 06:31 and the last at 17:15, 11 journeys in all.
- When is the first and last X4 bus from Cardiff to Merthyr Tydfil?
- On Tuesday 10 November the first bus leaves Cardiff at 07:37 and the last at 18:25, 11 journeys in all.
- Does the X4 bus run on Sundays?
- No. Runs Monday to Saturday.
- How often does the X4 bus run?
- On Tuesday 10 November it runs about every hour during the day (09:00 to 15:00), 11 journeys from Merthyr Tydfil.
- Where does the X4 bus stop?
- Main stops from Merthyr Tydfil to Cardiff: Merthyr Bus Station 8 (Merthyr Tydfil), Pontypridd Bus Station Stand 8 (Pontypridd), Day Centre (Treforest Industrial Estate), Greyfriars Road GJ (Cardiff). The full list is in the timetable below.
- Who runs the X4 bus?
- Stagecoach South Wales.
- How much does the X4 bus cost?
- Adult single £0.70 to £15.40, day ticket £6.80, weekly £17.90, monthly £63.10. Singles and returns depend on how far you travel; caps, passes and concessions can be cheaper.
Merthyr Tydfil to Cardiff
| Stop | Journey 1 | Journey 2 | Journey 3 | Journey 4 | Journey 5 | Journey 6 | Journey 7 | Journey 8 | Journey 9 | Journey 10 | Journey 11 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Merthyr Bus Station 8, Merthyr Tydfil | 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, Treforest Industrial Estate | 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, Cardiff | 07:31 | 08:34 | 09:36 | 10:34 | 11:34 | 12:34 | 13:34 | 14:34 | 15:49 | 17:09 | 18:19 |
Cardiff to Merthyr Tydfil
| Stop | Journey 1 | Journey 2 | Journey 3 | Journey 4 | Journey 5 | Journey 6 | Journey 7 | Journey 8 | Journey 9 | Journey 10 | Journey 11 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Greyfriars Road GJ, Cardiff | 07:37 | 08:40 | 09:40 | 10:40 | 11:40 | 12:40 | 13:40 | 14:40 | 16:00 | 17:20 | 18:25 |
| Day Centre, Treforest Industrial Estate | 08:01 | 09:03 | 10:03 | 11:03 | 12:03 | 13:03 | 14:03 | 15:06 | 16:33 | 17:50 | 18:49 |
| Pontypridd Bus Station Stand 5 | 08:13 | 09:15 | 10:15 | 11:15 | 12:15 | 13:15 | 14:15 | 15:22 | 16:50 | 18:06 | 19:01 |
| Merthyr Bus Station 1, Merthyr Tydfil | 08:37 | 09:39 | 10:39 | 11:39 | 12:39 | 13:39 | 14:39 | 15:47 | 17:18 | 18:31 | 19:26 |
Places on this route
Timetables from the Bus Open Data Service (Department for Transport), updated Monday, 9 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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