From London Gatwick airport fly to Cardiff airport then bus to Cardiff. 4hrs 13min $266. From London Gatwick airport fly to Bristol airport, bus to Bristol Temple Meads, then train to Cardiff. 4hrs 33min $294. From Gatwick Airport train to Reading then train to Cardiff Central. 3hrs 02min $71. From Gatwick Airport train to Clapham Junction StnFalcon Rd, line 170 bus to Victoria Coach Station, then line 509 bus to Gabalfa, Interchange (RN Roberts). 4hrs 34min $35. From Gatwick Airport train to Victoria Coach Station then bus to Cardiff, Kingsway. 5hrs 14min $79. From London Gatwick drive to Cardiff. 2hrs 48min $52.