Revealing mistake: When everyone goes up to the second floor on the escalator, behind them outside through the glass doors you can see people walking about. (01:09:10)
Suggested correction: I have rewatched this scene and saw no people.
Continuity mistake: As they are going down through the clouds to Bangor, in the wide shot before Bethany faints on Albert. Bethany has vanished from the seat beside Albert. This is before she has fainted. (00:47:25)
Suggested correction: The scene you are referring to is less than a second, and if you blink, you'll miss it. The only way to spot this mistake is to pause it or rewind numerous times, meaning it is not a valid mistake.
Other mistake: Towards the middle/end the mystery writer specifically says that on the airplane in Bangor there is electricity but in the airport there is none. However, when first arriving at the airport you can clearly see there are lights on overhead.
Suggested correction: There are no lights.
Deliberate mistake: The version of Earth that our main characters spend the story trapped in, is one individual second in the past that is identical to Earth in every way, with the only exceptions being there is no life or power. The Langoliers consume all the land in this one second and the remnants fall into a huge abyss. However, if this were like Earth, there should be thousands upon thousands of miles of soil beneath the land, but this is ignored for the sake of the plot.
Suggested correction: It is assumed that the Langoliers ate everything below that point to the Earth's core too.
Revealing mistake: When the Langoliers make a hole in the ground to stop the passengers from leaving, Brian turns the plane around so that the plane can take off from a different part of the runway. In the shot of the plane turning around, tyre marks can be seen on the ground, presumably from previous takes. (02:15:32)
Suggested correction: This was filmed in and around Bangor International Airport. Of course, there will be tyre marks.
