You can reach Thrissur by bus from select locations such as Bangalore, Trivandrum, Mumbai, Coimbatore, Kannur, Kozhikode, Kochi etc. There are various private and Government buses that provide these services. This might prove to be more expensive and may not make for a comfortable journey.
Head northwest on Vittal Mallya Rd
Take the 1st left onto Kasturba Rd/Rajaram Mohan Roy Rd/Vittal Mallya Rd
Turn right at Woody's Restaurant onto LB Road
Turn left after St Joseph's College
Turn right at Elgin Apartments onto Hosur Rd
Keep right to stay on Hosur Rd
Keep right to continue on Hosur Rd/Madiwala Underpass
Continue onto Kanyakumari Rd
Keep right to continue on Electronic City Flyover/Hosur Road Elevated Expy
Continue onto Bangalore Elevated Tollway Limited
Continue onto Kanyakumari Rd
Slight left to stay on Kanyakumari Rd
Slight right to stay on Kanyakumari Rd
Slight left to stay on Kanyakumari Rd
Take the ramp onto Salem-Ernakulam Hwy
Turn right to stay on Salem-Ernakulam Hwy
Turn left onto Coimbatore Rd/Trichy Rd/NH 67
Sharp right at Sre Saravana Bhavan to stay on Coimbatore Rd/Trichy Rd/NH 67
Take the 1st left onto Salem-Ernakulam Hwy
Turn left to stay on Salem-Ernakulam Hwy
Turn right onto Trichur-Palghat Rd
Turn left at ACTS onto Swaraj Round E
Turn left at Bini Tourist Home onto Shoranur - Thrissur Rd