From London Gatwick airport fly to Cardiff airport then bus to Cardiff. 5hrs 03min $267. From London Gatwick airport fly to Bristol airport, bus to Bristol Temple Meads, then train to Cardiff. 6hrs 01min $292. From Gatwick Airport train to Reading then train to Cardiff Central. 3hrs 13min $95. From Gatwick Airport train to Clapham Junction StnFalcon Rd, line 170 bus to Victoria Coach Station, then bus to Cardiff, Kingsway. 4hrs 39min $82. From South Terminal Bus Station bus to Heathrow Central Bus Station then line 202 bus to Cardiff, Bus Station (Cardiff Central Bus Station B2). 5hrs 25min $48. From London Gatwick drive to Cardiff. 2hrs 48min $57.