From Gatwick Airport train to Clapham Junction then train to Winchester. 1hrs 45min £34. From Gatwick Airport London bus to Heathrow Airport London then bus to Winchester. 2hrs 45min £34. From Gatwick Airport train to Guildford Railway Station, line 65 bus to Alton, High Street, then line 64 bus to Winchester, Bus Station. 3hrs 10min £24. From London Gatwick Airport (LGW) drive to Winchester. 1hrs 20min £18.