REPORT: Luton Town 1 Wigan Athletic 2
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Only brilliant goalkeeper from Ben Amos had kept Latics in the game in the first half.
But there was nothing he could do just before half-time when a Carlton Morris header looped over his left hand and into the top corner.
Luton continued to press in the second period, with Leam Richardson making a triple change on the hour mark to try to stem the flow.
That saw Graeme Shinnie, Nathan Broadhead and Aasgaard coming on, and immediately Latics looked sharper.
Callum Lang grabbed the equaliser with 10 minutes left, with a shot that deflected in off Tom Lockyer.
And Aasgaard proved what proved to be the winner with a fantastic curling strike into the top corner from the edge of the box.
Luton thought they’d levelled right at the death, but the flag was up on the near side for offside.