The calculated distance (air line) between Pathanāmthitta and Tirunelveli is approximately 72 miles respectively 116 kilometers.
By car or train, the actual journey to Tirunelveli is certainly longer, as only the direct route (as the crow flies) between Pathanāmthitta and Tirunelveli has been calculated here.
Air line (approximately)
116 kilometers
62 nautical miles