Gabe Robinson (2) and Francis Spiterl got the goals – all in the second half – to put DEan Cox’s side in the hat for Monday’s first qualifying round draw.
Lancing beat Crawley Down Gatwick in the extra preliminary round a fortnight ago and will now be hoping their cup form rubs offs in the SCFL premier division, in which they have had a tough start.
See pictures by Stephen Goodger from the Lancing-Harefield tie on this page and those linked and get the local football action in the Worthing Herald, out on Thursday.
17. Lancing FC v Harefield United in the FA Cup pictures by Stephen Goodger (24).jpeg
Lancing FC v Harefield United, FA Cup preliminary round Photo: Stephen Goodger
18. Lancing FC v Harefield United in the FA Cup pictures by Stephen Goodger (20).jpeg
Lancing FC v Harefield United, FA Cup preliminary round Photo: Stephen Goodger
19. Lancing FC v Harefield United in the FA Cup pictures by Stephen Goodger (23).jpeg
Lancing FC v Harefield United, FA Cup preliminary round Photo: Stephen Goodger
20. Lancing FC v Harefield United in the FA Cup pictures by Stephen Goodger (19).jpeg
Lancing FC v Harefield United, FA Cup preliminary round Photo: Stephen Goodger