Carmarthen ▸ London
London ▸ Carmarthen ⇄Direct buses · no change
- 11:10 → 17:20National Express 508Carmarthen, Rose and Crown → London, Victoria Coach Station Arrivals · via Swansea, Bridgend, Reading6h105 stopsRuns: Sat, SunBook on National Express ↗
- 11:10 → 17:35National Express 508Carmarthen, Rose and Crown → London, Victoria Coach Station Arrivals · via Swansea, Bridgend, Reading6h255 stopsRuns: Only Fri 30 Oct, Fri 6 Nov, Fri 13 Nov, Fri 20 NovBook on National Express ↗
- 11:10 → 17:50National Express 508Carmarthen, Rose and Crown → London, Victoria Coach Station Arrivals · via Swansea, Cardiff, Reading6h405 stopsRuns: Mon to ThuBook on National Express ↗
Local times at each stop. Times from official open data: National Coach Services Dataset (Department for Transport) (file of 23 Oct 2026). Checked Thu 29 Oct 2026; they cover 29 Oct to 25 Nov 2026. Timetables change, so check with the operator before you travel. A bus from a company that publishes no open timetable may be missing. Contains public sector information licensed under the Open Government Licence v3.0: the National Coach Services Dataset (Department for Transport), taken from the Bus Open Data Service website. How we build this.
Quick answers
Is there a direct bus from Carmarthen to London?
Yes. 1 a day on average, with National Express, no change of bus (29 Oct to 25 Nov 2026).
How long is the bus from Carmarthen to London?
The fastest takes 6h10; the slowest 6h40, for 291 km as the crow flies.
When do the buses leave?
The earliest leaves at 11:10 and the latest at 11:10, local time in Carmarthen. Not every bus runs every day: pick a date above.
Is there a night bus from Carmarthen to London?
Not an overnight one: every bus here travels by day or evening.