Massimiliano Latorre and Salvatore Girone, who were allowed to go home for two weeks by the court, will board a special flight for Kochi by around 9 pm on Friday and arrive in Kochi by 8.30 on Friday morning, according to their counsel P Vijaybhanu.
They will be leaving for Kollam court on Friday soon after reaching Kochi to surrender their passports, he said.
Personnel from Defence and External Affairs Ministries of the Italian government are accompanying the two to Kochi.
The marines were arrested on February 19 last year for shooting to death two Indian fishermen -- Ajesh Binki (25) and Jelestine (45) from onboard merchant vessel 'Enrica Lexie' off Alapuzha coast, 'mistaking' them for Somali pirates.
Stringent conditions had been laid down by the court, which had asked them to return by January 10. The Kollam sessions court had asked them to be present for the trial on January 15.
The Italians had also executed Rs six crore bank guarantee as directed by the Kerala High Court for allowing them to leave for two weeks.
Kerala Government had opposed the marines plea in the high court by saying it was a ruse to "smuggle them out" and would "torpedo" the ongoing trial.