Welling will face Dartford in the Blue Square Bet South final after overcoming Sutton United over two legs in their semi-finals ties.
After a 2-1 win in the first let, the two sides played out a goalless draw at Park View Road.
Dartford, meanwhile, defeated Basingstoke 3-1 on aggregate after their 1-0 away win was followed up with a 2-1 victory on Sunday.
Elliot Bradbrook put the Darts into the driving seat with the game's opener on 57 minutes but Shaun McAuley gave his side hope with an equaliser in the 68th minute.
However, The Dragons' final hopes were dashed when Luke Wilkinson put the tie beyond doubt in the 73rd minute.
Welling 0-0 Sutton Utd
Dartford 2-1 Basingstoke
Players leaving so it will be a new start in many ways I think...hope new manager is announced soon o... MORE >>
By orpewise on Mon, 20th May 13
|BlueSq South Standings|
|10||Havant and Waterlooville||58|