From Monmouth bus to Cardiff University. 1 h £8. From Wyesham Turn bus to Chepstow, Bus Station (Chepstow Bus Station), walk to Chepstow, then train to Cardiff Central. 2 h 2 min £16. From Over Monnow, Somerset Road bus to Newport, Friars Walk then line 30 bus to Cardiff, Customhouse Street (Golden Cross PH). 2 h 2 min £9. From Monmouth taxi to Cardiff. 40 min £169. From Monmouth drive to Cardiff. 40 min £7.