Mae gwasanaeth T1C yn aros wrth bob safle bws rhwng Aberystwyth - Aberaeron - Llanbedr Pont Steffan a Chaerfyrddin ac wedyn yn aros wrth rai safleoedd rhwng Caerfyrddin a Chaerdydd drwy Gross Hands, Gorsaf Fysiau Abertawe a Phentref Manwerthu Pen-y-bont ar Ogwr.
T1C service stops at all stops between Aberystwyth - Aberearon - Lampeter and Carmarthen and then operates limited stops between Carmarthen and Cardiff via Cross Hands, Swansea Bus Station and Bridgend Outlet Village.