Corrected entry: When Kevin's mother realises she's forgotten her son and decides to return, she takes a plane, but the plane which she arrives in later is totally different.
Corrected entry: Kevin's dad calls the neighbour's house and leaves a message. How can he when he and the neighbors live on the same block and the phones are supposed to be out?
Corrected entry: Kevin can manage to do the shopping, and work out how to use the washing machine; and yet he needed his mum to help pack his suitcase?
Corrected entry: The entire plot relies on Kevin's parents being unable to call home to speak to their son, after the phone service to their house is severed by a falling tree (when the McAllisters are getting into the van a utility worker tells Mrs. McAllister that the power has been restored, but that the phones "are a mess" and that it will take several days to repair them, especially around the holidays). Kevin, however, is somehow able to call Little Nero's to deliver his very own cheese pizza; this is never explained. It serves no purpose but to set up the use of the "Angels with Dirty Souls" tape later in the film. If Kevin is able to do this because the phone lines have been fixed at this point (an argument supported by the fact that Mr McAllister is able to call and leave a message with a neighbour who lives on the same block), then this makes even less sense. Considering the mother is so desperate that she bribes passengers at the airport to secure a seat back from Paris, it is unlikely that the family do not continue to call the house on a regular basis. (00:45:50 - 00:47:25)
Corrected entry: When the robbers return to the McAllisters' house and are scared off by Kevin's fake "party," why didn't they notice that even though lots of "people" were inside, no cars were parked outside the house?
Corrected entry: When Kevin prepares the house to defend it against the bandits, he pours water over the steps at the front door and on the stairs to the basement. The water freezes practically immediately. In a later shot, when Kevin is running from the bandits to his neighbours house, you see that the street is covered with puddles of (liquid) water.
Corrected entry: The McAllister's flight arrives at Paris's Orly airport. Orly is used for domestic/continental flights only. DeGaulle is Paris's international airport.
Corrected entry: After Kevin has been out of the house and said, "I'm not afraid anymore", it was night, but when his mom calls from Paris and they send a policeman to their house, it is broad daylight and Kevin is still under the bed cover.
Corrected entry: In the scene where Kevin is sentenced to the third floor, you can see that the roof joists of this house are open and un-insulated, making this attic way too cold for use as a spare bedroom - something a resident of "Shermer, Illinois" and not southern California would know.
Corrected entry: Electrical irons are bottom heavy so that they stand up more sturdily. How would Marv be left with the imprint of the top part when the bottom of the iron falls first?
Corrected entry: When Harry and Marv are swinging on the clothes line they hit the brick wall and it moves.
Corrected entry: When the first shot of the rigged rope is shown outside of the upstairs window, the rope appears to be horizontal. Yet, when Kevin rides down it, the rope appears to now be sloping downward towards the treehouse.
Corrected entry: When Kevin goes to the market, he had one pack of toilet paper in his cart and as he heads through checkout. In the next scene, it shows him walking home with two bags. You can see that there are two packs of toilet paper (one in each bag).