The calculated distance (air line) between Kallakurichi and Tiruvannāmalai is approximately 35 miles respectively 56 kilometers.
By car or train, the actual journey to Tiruvannāmalai is certainly longer, as only the direct route (as the crow flies) between Kallakurichi and Tiruvannāmalai has been calculated here.
Air line (approximately)
56 kilometers
30 nautical miles