IISER TVM is about 45 km from the airport.
A taxi will cost around Rs. 1800/- from the Airport to the IISER TVM permanent campus. For auto it costs Rs. 1000-1300/-
The optimal road is via intermediate towns, Nedumangad and Vithura
The campus is located about 8 kilometers from Vithura
The journey from the city to the campus takes about 1 hour 30 minutes
KSRTC (Kerala State Road Transport Corporation) bus services are available from KSRTC Central bus station known as Thampanoor popularly
Since direct buses to IISER are infrequent, one can take a bus to Vithura and then switch to an auto to reach IISER.