Goals from Jake Gallagher, Sam Corne and a Jamie Grimes own goal condemned Harriers to defeat at Park View Road.
The Wings entered the interval two goals to the good and sent themselves on their way for their first home win of 2015; Harriers, meanwhile, drop down to 13th in the Vanarama Conference.
Both sides had suffered Easter Monday defeats but Harriers’ starting XI remained unchanged, while Welling made three alterations, as Corne, Dominic Vose and Michael Chambers replaced Sam Berry, Joe Healy and Tashan Adeyinka.
And it was a case of ‘same old story’ for Harriers who, despite appearing the better side in a fruitful early period, found themselves 2-0 down at the interval through two wholly avoidable goals.
Skipper Gallagher broke the deadlock for the Wings after 26 minutes as he stood totally unmarked at Danny Lewis
’ near post to head home from St Aimie’s cross, whose route down the right was far too easily navigated.
Welling then added another in an unfortunate, almost comedic own goal for Harriers.
Lewis’ attempted clearance from a Ross Lafayette header on the edge of the box initially seemed to ricochet off Keiron St Aimie, but it was in fact Grimes who was struck by his team-mate's kick, sending the ball soaring in the opposite direction into the back of the net.
And United were mere inches away from making it three on the stroke of half time as Vose dribbled along the byline and passed across goal, where the waiting St Aimie slid in, but somehow knocked the ball behind him when it seemed much easier to score.
They did so, however, in the second half, as Corne skipped into the box, dodging challenges from yellow shirts in the process, and found the bottom corner with a composed finish on the 72nd minute.
It was a frustrating scenario for manager Gary Whild as Harriers had enjoyed a bright opening; Callum Gittings
and Luke Maxwell tested the waters with early shots at goal, before Danny Wright’s skilful flick and turn set himself up for a fifth-minute attempt which was scooped wide.
He and strike partner Lee Hughes were soon in the mix as the latter attempted to steer Wright’s header from Jared Hodgkiss’ cross goalwards, but to no avail.
Harriers certainly appeared comfortable, demonstrated when an initially rare Wings venture forward was brought to an immediate halt by Maxwell inside the first 20 minutes.
But James Fry picked up a knock in the process of Wellings’ counter-attack and was forced off, replaced by Craig Reid.
The break in play slowed the tempo a little and the hosts began to ask questions through Lafayette, before taking the lead soon afterwards and providing themselves with the upper hand.
A Hughes shot from Wright’s pass across the box was blocked shortly afterwards but it wasn’t long before Welling had their second and they kept the pressure up until the interval through Voss and Gallagher.
Harriers re-emerged early ahead of the second half but little changed as Grimes prevented Lafayette from doing more damage with a neat tackle 10 minutes into the second half.
Further re-shuffling was required as, shortly after Kevin Nicholson replaced William Boyle, Gittings hobbled off as the second Harriers player to pick up an injury, with Jamie Spencer called upon in his place.
A meek header by Wright and an ambitious effort from Hughes, who sent a quick-thinking long-distance effort wide after Jonathan Healy’s clearance fell at his feet, preceded Welling’s third goal.
And from then on, apart from a well-saved Nicholson free-kick and a short header by Spencer, the game fizzled out for Harriers, who limped towards a full-time whistle met with jubilation by a Welling side chasing Conference safety.