From Mitcham Eastfields train to Clapham Junction then train to Gatwick Airport. 44min £15. From Mitcham, Downe Road Mitcham Library bus to Gatwick Airport, South Terminal Coach Station. 54min £14. From Mitcham taxi to London Gatwick Airport (LGW). 30min £98. From Mitcham drive to London Gatwick Airport (LGW). 30min £4.