From Gatwick Airport train to Reading then train to Cardiff Central. 3hrs 18min £80. From Gatwick Airport London bus to Cardiff Coach Station. 4hrs 45min £42. From London Gatwick Airport (LGW) drive to Cardiff. 2hrs 48min £40. From London Gatwick airport fly to Bristol airport, bus to Bristol Temple Meads, then train to Cardiff. 5hrs 13min £113. From Gatwick Airport towncar to Cardiff. 2hrs 47min £60.