Let KAYAK do the searching
Based on KAYAK hotel searches, the most popular destination is Chennai (87% of total searches to Tamil Nadu). The next most popular destinations are Ooty (5%) and Velankanni (4%). Searches for hotels in Coimbatore (3%) are also popular.
KAYAK users have found double rooms in Tamil Nadu for as cheap as $14 (Kodaikanal) in the last 3 days. The average price is $165.