From London Mitcham bus to Gatwick Airport London. 52min £16. From Mitcham, Downe Road Mitcham Library bus to Gatwick Airport, South Terminal Coach Station. 54min £6. From Mitcham Eastfields train to Clapham Junction then train to Gatwick Airport. 44min £15. From Mitcham taxi to London Gatwick Airport (LGW). 31min £95. From Mitcham drive to London Gatwick Airport (LGW). 31min £5.