The journey from Ranni to Pondicherry covers 550 km. The most practical way is to take a train from Chengannur to Chennai and then a bus or taxi to Pondicherry. Alternatively, you can take a bus to Coimbatore and then a connecting bus to Pondicherry. The journey takes about 12 to 14 hours.
Total Distance: 550 km by road, 420 km air distance.
Take an overnight train to Chennai.
November to February for pleasant weather.