X4 Merthyr Tydfil to Cardiff via Pontypridd, Whitchurch
Operated by Stagecoach South Wales. First bus 06:31, last bus 18:25. 22 journeys on weekdays. Fares: adult single £1.40 to £7.70 — more.
Wanted a different X4? 24 other bus routes are numbered X4 elsewhere in the UK — see every X4 bus timetable by area.
| Stop | 06:31 | 07:21 | 08:31 | 09:33 | 10:33 | 11:33 | 12:33 | 13:33 | 14:45 | 16:00 | 17:15 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 |
Each column is one journey, headed by the time it sets off. 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.
Fares on the X4
Adult single £1.40 to £7.70 · Child single £0.90 to £1.00 · Child return £1.60 to £4.00
Adult single fare table, stage to stage
| £1.40 | Mardy | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| £2.10 | £1.40 | BakersGarage | |||||||||
| £2.90 | £2.60 | £2.10 | Hoover | ||||||||
| £6.30 | £6.30 | £6.30 | £6.30 | Pontypridd | |||||||
| £6.80 | £6.80 | £6.80 | £6.80 | £2.90 | Upper Boat | ||||||
| £6.80 | £6.80 | £6.80 | £6.80 | £3.70 | £1.60 | OxfSt/PcN'garw | |||||
| £6.80 | £6.80 | £6.80 | £6.80 | £3.70 | £1.60 | £1.60 | N'garw Xkeys | ||||
| £7.70 | £7.70 | £7.70 | £7.70 | £3.70 | £3.70 | £3.70 | £3.70 | Manor Way | |||
| £7.70 | £7.70 | £7.70 | £7.70 | £3.70 | £3.70 | £3.70 | £3.70 | £2.60 | G'balfa B'weir | ||
| £7.70 | £7.70 | £7.70 | £7.70 | £3.70 | £3.70 | £3.70 | £2.60 | £2.60 | £1.90 | Corbett Rd | |
| £7.70 | £7.70 | £7.70 | £7.70 | £3.70 | £3.70 | £3.70 | £3.70 | £2.60 | £1.90 | £1.90 | Cardiff centre |
Read along the row of the stage you travel to, to the column below the stage you board at; the first stage is MerthyrTydBS.
Stagecoach's published fares on the Bus Open Data Service, in force from 1 September 2026. A fare stage is a group of neighbouring stops that are priced the same. Fares change — check with Stagecoach South Wales before you travel.
Tickets on the X4
Stagecoach South Wales publishes singles, day returns, day tickets and season tickets on this route for adults, children and young people.
Return Wales · Single Wales · Day NetworkRider · Aberdare DayRider · Child TocynyCymru · Weekly NetworkRider
…and 17 more tickets on this route.
Ticket types come from Stagecoach South Wales's own fares data on the Bus Open Data Service, last updated 3 September 2026. Prices for singles and returns are under Fares above; for the others, check with Stagecoach South Wales.
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 Stagecoach South Wales before you travel. Everything above is an ordinary week.
Not published yet: Christmas Eve, Christmas Day, Boxing Day, 28 December, New Year's Eve, New Year's Day and 2 January. Operators often publish festive timetables only a few weeks ahead, so check again nearer the date.
Route map
All stops on route X4
X4 towards Cardiff
All 30 stops
- Merthyr Bus Station 8 Merthyr Tydfil
- Castle Bingo (nr Aldi) Merthyr Tydfil
- Warlow Street (after) 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
- Ynysangharad Park Gates (o/s) Pontypridd
- Pontypridd Bus Station Stand 8 Pontypridd
- Catherine Street E2 Pontypridd
- Roundabout (after) Upper Boat
- Pottery (before) Treforest Industrial Estate
- Trefforest Estate Offices (nr) Treforest Industrial Estate
- Day Centre (before) 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
- Pantbach Place (before) Birchgrove
- 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
- Greyfriars Road GJ Cardiff
X4 towards Merthyr Tydfil
All 31 stops
- 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
- Tyn y Parc Road (before) Whitchurch
- Brocastle Road (after) Whitchurch
- Heol y Forlan (before) 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
- Ynysangharad Park Gates (o/s) Pontypridd
- Pontypridd Bus Station Stand 5 Pontypridd
- Hoovers Sports (o/s) Pentrebach
- Hoovers Main Gate (after) Pentrebach
- Hoovers Top Gate (before) Pentrebach
- Evans Halshaw (opp) Merthyr Tydfil
- Mardy Terrace (o/s 6) Merthyr Tydfil
- Mardy (nr) 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 registration & registered changes
- Service change effective 29 March 2026 To amend Timetable.
- New service effective 31 August 2025 Monday to Saturday
From official Traffic Commissioner registrations. Registration PG0006630/382 · Changes in Cardiff Council · All service changes →
Towns & areas on this route
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?
Stagecoach South Wales's published fares on the X4: adult single £1.40 to £7.70, child single £0.90 to £1.00, child return £1.60 to £4.00. 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 Stagecoach South Wales via the DfT Bus Open Data Service (Wales feed). Registered with the Traffic Commissioner as PG0006630/382. Check before you travel — services can change at short notice.