Gwasanaeth Awyr Mewnol Cymru yw'r ffordd gyflymaf o deithio rhwng y gogledd a'r de, ac mae’n galluogi teithwyr a thwristiaid i deithio ar draws y wlad ac yn ôl mewn diwrnod, heb yr angen i aros dros nos.
The Intra Wales Service is the quickest way of travelling between north and south Wales, allowing business travellers and tourists to travel across the country and return in a day without the need for an overnight stop.