The nearest airport is Tirchy Airport . Kumbakonam can be reached from Airport by Bus which will take 4hours travel.
Kumbakonam is well connected to all the major towns and cities. Tamil Nadu and Karnataka State Transport Corporations operate buses to Kumbakonam.
From Chennai 5-6 hrs of travel by bus.There are excellent bus services provided by both government and private travel services. For more comfortable travel its better to choose a private travel service. from Tiruchy it's about 90Kms and about 40kms from Thanjavur.
for online bus reservision visit to ticketgoose.com
Rock Fort Express connects Kumbakonam to Chennai, JanShatabthi express Connects the town with Coimbatore, while the Mailaduthurai-Mysore Express connects the town with Bangalore and Mysore. There are various passenger trains to Thirunelveli and to other towns nearby.
Janashatabthi express Reaches by 13.30 and leaves to Coimbatore by 14.30
The Train from Bangalore starts @ 19:15 from Bangalore and reaches Kumbakonam early morning at 05:30.
Auto's from the Kumbakonam Station charge a minimum of Rs.40/- even for the nearest Hotel. If you can move out of the Station and get a 'running' auto and talk as if you have visited the city a zillion times :)