Focusing on movement:
* The plane soared through the sky like a giant bird.
* The plane glided through the air like a feather on the wind.
* The plane took off like a rocket, leaving the ground in a blur.
* The plane landed softly, like a butterfly settling on a flower.
Focusing on appearance:
* The plane looked like a silver bullet against the blue sky.
* The plane was as sleek and streamlined as a shark.
* The plane's wings were as wide as a football field.
Focusing on experience:
* Flying in the plane was like being in a metal cocoon.
* The plane ride was as smooth as a glass of water.
* The turbulence was like being tossed around in a washing machine.
Ultimately, the best simile depends on the specific context and what you want to convey about the plane.