The 88 year-old DMK patriarch, his wife Rajathi and grandson and Kanimozhi's son Adithya are scheduled to leave by a government carrier in the evening, airport sources said.
Kanimozhi has been lodged in jail for almost six months and has been denied bail. A Special CBI court will pronounce its order on Saturday on framing of charges in the 2G spectrum case.
In the process of framing of charges, the court decides as to who among the accused has sufficient prima facie evidence against him/her to be put on trial.
The court will resume hearing on the bail applications of various accused, including that of Kanimozhi, from October 24.