Preposition

[Ferdie Formanes]

Hi,

I wonder how come the sentence below correct! Shouldn't we use "in" as the Preposition?

I can never sleep on a plane/bus/train.

Please help me. Thank you.

[Marius Hancu]

on a plane: during the trip in the plane
in a plane: inside the plane

The sentence is correct

[Bridget]

Mostly, "on a plane/bus/train (journey)".

[OddThomas]

And I can never sleep in a car, on a boat, on a motorcycle, on a horse, in a helicopter, in a balloon, on a raft, or on a skateboard :).

[Bridget]

Be sure that "I can never sleep on a plane" refers to a plane in motion. It means much more than "while sitting on a plane".