Mills scored 102 goals for Whitehawk after joining the club in 2012, having previously had spells with clubs including Peterborough United and Torquay United.
The 27-year-old joined Fleet in the summer of 2017 but spent much of last season on loan at Dartford and the Fleet made him available for transfer this summer.
He re-unites with former Whitehawk manager Steve King at Park View Road.
Welling have just lost striker Adam Coombes to new league rivals Billericay Town and Mills fits the bill as an ideal replacement for the Wings. |