From London Gatwick airport fly to Cardiff airport then bus to Cardiff. 5hrs 13min $188. From London Gatwick airport fly to Bristol airport, bus to Bristol Temple Meads, then train to Cardiff. 5hrs 23min $277. From Gatwick Airport train to Reading then train to Cardiff Central. 3hrs 06min $95. From Gatwick Airport train to Clapham Junction StnFalcon Rd, line 170 bus to Victoria Coach Station, then bus to Cardiff, Kingsway. 4hrs 51min $72. From South Terminal Bus Station line 201 bus to Bristol Bus Stn then bus to Cardiff, Bus Station (Cardiff Central Bus Station B4). 5hrs 45min $60. From London Gatwick drive to Cardiff. 2hrs 58min $55.