From London Gatwick airport fly to Cardiff airport then bus to Cardiff. 4hrs 23min $267. From London Gatwick airport fly to Bristol airport, bus to Bristol Temple Meads, then train to Cardiff. 5hrs 06min $291. From Gatwick Airport train to Reading then train to Cardiff Central. 3hrs 13min $85. 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 $57. From South Terminal Bus Station bus to Heathrow Airport Terminal 4, Heathrow Terminal 4 then line 202 bus to Cardiff, Bus Station (Cardiff Central Bus Station B2). 6hrs 05min $48. From London Gatwick drive to Cardiff. 2hrs 48min $60.