Everything you thought about “Home Alone” could be a lie. Until now, the majority of the movie-going world thought a power-outage caused everyone to oversleep, and Kevin to be left behind as a result.
However, a Reddit user named “bobcobble” has way too much time on his hands, and he discovered something you likely missed. There’s a scene where Kevin’s father’s in a hurry to throw stuff in the trash, and that stuff included an American Airlines ticket with Kevin’s name on it.
So…it’s possible that Kevin was left on-purpose. That little detail would’ve changed the plotline, and the ensuing sequel, dramatically.