The A4066 road, connecting St Clears and the coastal resort of Pendine, runs through the town, providing relatively easy access to the A40.
Mae ffordd yr A4066, sy'n cysylltu Sanclêr a chyrchfan arfordirol Pentywyn, yn rhedeg drwy'r dref, gan ddarparu mynediad cymharol hawdd i'r A40.