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.
Factual error: After taking off from Bangor, the pilot pulls back on the flight control bringing the plane up to level flight. However, after taking off, a plane is "nose up" and would require pushing forward on the controls to bring the nose down to level. This is also evident by looking at the attitude indicator (circle with top half blue and bottom half brown). The white line indicates the horizon and you can watch the indicator show the plane's attitude coming from below horizon (nose down) to the horizon (level flight).
Suggested correction: It is possible that as the pilot was watching the airport disintegrating and vanishing, he accidentally or deliberately let the plane nose go down because this sight was so extraordinary that he might have forgotten to fly the plane properly or wanted to get a better view.
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.
