Trivia: Macaulay Culkin reprised his role as Kevin McAllister in 2018, recreating key scenes in the film in an advert for Google Home.

Home Alone (1990)
1 mistake
Directed by: Chris Columbus
Starring: Catherine O'Hara, Daniel Stern, Joe Pesci, John Heard, Macaulay Culkin
Other mistake: Kevin rides down the stairs on his sled and out the door. He originally lined up the sled at the top of the stairs, but it is clear that the stairs lie to the right of the door. His sled went straight down the stairs, therefore making it impossible to go straight out the door in one movement as shown. (00:25:25)
Megan McCallister: You're not at all worried that something might happen to Kevin?
Buzz McCallister: No, for three reasons: A, I'm not that lucky. Two, we use smoke detectors and D, we live on the most boring street in the whole United States of America, where nothing even remotely dangerous will ever happen. Period.

Trivia: When Kevin is in Buzz's bedroom, he finds in the box a picture of Buzz's girlfriend. This is actually a picture of the art director's son dressed up to look like a girl, because the director, Chris Columbus, thought it would be too harsh to make fun of a girl like that.
Question: Maybe I missed it, but did the McAllisters even bother to call home? I don't remember them calling the house at all. Why wouldn't that be the first thing they do? Kevin seems to be pretty independent for his age. He might have not answered the door, but I'm sure he would have answered the phone.
Answer: The phone lines were fixed by the end of the movie. Remember, this takes place over the course of several days.
Answer: That is also how Kevin was able to order his cheese pizza from Little Nero's.
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Chosen answer: They did but the power and phone lines were down due to a tree branch that had fallen on them the night before the family left. A flight attendant on their plane mentions that attempts had been made to call the McAllisters' home but "the phones are still out of order".
Jeff Swanson
But how did he call the police at the end if the phone lines were down.
That was several days later. Clearly the phone lines were repaired over the course of the film.
The film takes place over 3 or 4 days.
Ssiscool
After the storm the lineman tells them the power has been restored but the phone lines are "a mess" and that it would take several days to get them fixed. They were out initially, and then in various stages of repair afterward.
Also explains calling for a pizza.
Ssiscool