The result saw the Reds take the last-16 tie 7-1 on aggregate, with goals from Jesse Lingard and substitute Anthony Martial securing the win on the night.
Here are the top talking points from the second leg…
COPENHAGEN IN COLOGNE
Although the job against LASK was virtually done heading into the match, United still needed to see out the tie and completely secure a quarter-final place. Having done so, the Reds will now head to Cologne on Monday to face FC Copenhagen for a spot in the last four. The Danes take on Ole Gunnar Solskjaer’s side after winning 3-1 on aggregate against Istanbul Basaksehir, having overturned a one-goal deficit from the first leg.