Bus services are very good and thanks to yesmytrip .
Coimbatore to Trichy
Thanjavur to Coimbatore
Bangalore to Coimbatore
Karaikal to Tiruppur By Pass
Nagapattinam to Chennai
Trichy to Coimbatore
Coimbatore to Karaikal
Kumbakonam to Coimbatore
Coimbatore to Nagapattinam
Bangalore to Tirupur