How long does it take and is there a bus from merthyr tydfil to brecon
There is a Cardiff bus (X43) which goes from Merthyr to Brecon....takes 30 - 40 minutes. About 6 a day.Edited: 24 August 2013, 14:00
National Express also serve Brecon once a day each way.
Through ticketing is available to/from various locations across the country.
Hope this info may be of some help.