Let KAYAK do the searching
Based on KAYAK hotel searches, the most popular destination is Chennai (77% of total searches to Tamil Nadu). The next most popular destinations are Ooty (9%) and Madurai (8%). Searches for hotels in Velankanni (6%) are also popular.
KAYAK users have found double rooms in Tamil Nadu for as cheap as £7 (Kodaikanal) in the last 3 days. The average price is £55.