The migrants have been in Vanuatu, where they were taken with the promise of work, since November.
Many have refused to return to Bangladesh, and they've since been living off rations in Port Vila.
But Bangladesh's high commissioner to Australia, Sufiur Rahman, said the majority of them are now willing to return.
He said he's expecting about 70 to return to Bangladesh in different phases, starting in about a week.
But the International Organisation for Migration, which is arranging flights, said there are no confirmed departures yet.