GOALS in each half from Carl Owen and James McIntosh ensured Airbus a place in next season's top flight.
Owen broke the deadlock two minutes before the break when he latched on to a through ball from Jack Abraham to force the ball past Prestatyn keeper Jon Dunt from close range.
In a first-half dominated by defences, Andy Moran brought saves from home keeper Chris Doran early on, while Matty Woodward's drive from 20 yards was tipped over the bar by Dunt.
It took a superb save from Doran to keep out a Jon Fisher-Cooke straight after the break and Moran also forced the home stopper into a save wiith a diving header.
Wingmakers' sub Marc Lloyd Williams was foiled by Dunt but the hosts sealed the victory eight minutes from time when fellow sub James McIntosh scored with a superb looping header.
Prestatyn almost scored a consolation, but Fisher-Cooke's shot rebounded off the crossbar.
Airbus line up: C Doran, R Edwards, G Feliciello, M Woodward, M Allen, A Williams (Josh Johnson 29'), J Abraham,  D Desormeaux, P McManus, C Owen (James McIntosh 75'), T Rowlands (Marc Lloyd Williams 55').
Sub not used: J Challinor.
Attendance: 202