Diego Simeone's side are through to the semi-finals for the third time in four seasons alongside city rivals Real Madrid, who beat them after extra-time and penalties respectively in the 2014 and 2016 finals and triumphed in a 2015 quarter-final. Incredibly unlikely yet still a freakish possibility that would have been in keeping with Leicester's astonishing title win last season.
Registering eight shots at goal, attempting 12 crosses and created three chances - all to the visitors' none - and had the away side on the backfoot as they made 18 clearances.
Leicester defender Christian Fuchs spoke beforehand about the part the home crowd could play and the wall of noise and fireworks that greeted kickoff would have shaken less battle-hardened sides than Atletico. "Not in my lifetime".
Leicester City striker Leonardo Ulloa believes Claudio Ranieri's controversial sacking brought about a "momentum change" for the Premier League champions.
The tactic certainly made life hard for Atletico.
Leicester City manager Craig Shakespeare has suggested that there have been no talks over remaining at the King Power Stadium next season.
Vardy's goal was no more than they deserved and for a time they had Atletico rocking, giving the King Power Stadium belief that another miracle was on the cards. Hopefully it is no more but I've only just seen him briefly at the end.
Two years ago, they were relegation battlers.More news: Close election in Kansas gives hope to Democrats
Bayern was trying to become only the third team to reverse a first-leg home loss in Champions League history, along with Inter Milan in 2011 and Ajax in 1996. They ended up winning the group after going 4-1-1 and picking up 13 points, two more the second-placed Porto.
Yet that was as good as it got for Leicester, whose European adventure sadly seems over for a long time.
"You've got to be careful that you don't get too carried away in football". Simeone wants that trophy badly and his passion on the sidelines in these ties is a small indicator of just how badly he does.
"The here and now is the important bit and Arsenal, a week on Wednesday, is the next game". If it is, this was a match and occasion that contained so numerous attributes that has made Leicester's run to the last eight so memorable and so creditable.
Leicester fans knew that their team had a tough task ahead of them if they were to make it to the Champions League semi-finals.
2015-16 was their season and they would not swap anything for that. There will be a rush of disappointment that inevitably follows defeat that is expected or otherwise, but this team and this club deserve to look back on this experience in a wholly positive light.
It all sounds a far cry from the dizzy feats of last season.