Passengers baffled after unusual sight inside cabin of Jetstar flight

The moment a thick white mist began filling the cabin of a Jetstar plane has left passengers baffled - but there's a simple explanation.

Passengers noticed the fog-like haze drifting through the aircraft, limiting visibility.

The footage, uploaded to social media this week, was taken on a Jetstar flight leaving Bali and sparked a wave of reactions from Aussies.

Many said they had experienced the same phenomenon on other flights.

'My Jetstar flight was like this from Denpasar to Sydney last weekend,' one commenter wrote.