A Sri Lankan man who threatened to set off a bomb on an international flight from Melbourne will serve at least nine years in jail.

Manodh Marks, 26, forced Malaysia Airlines flight MH128 bound for Kuala Lumpur to turn back soon after take-off when he screamed that he had a bomb in May 2017.

Manodh Marks after he was arrested at Tullamarine last year. Credit:AAP

The visibly agitated, ice-fuelled Marks ran down the aisle of the Airbus A330 holding two electronic devices with flashing blue lights, saying he was going to blow up the plane.

Marks, who was actually holding a speaker device and a power bank, was jailed for 12 years on Thursday with a minimum term of nine years.