From Mitcham Eastfields train to Clapham Junction then train to Gatwick Airport. 48min £15. From Mitcham Fair Green bus to Banstead, The Woolpack then line 420 bus to Gatwick Airport, Gatwick South Terminal. 2hrs 58min £7. From Mitcham taxi to London Gatwick Airport (LGW). 30min £98. From Mitcham drive to London Gatwick Airport (LGW). 30min £4.