There is no direct connection from Thrissur to Ooty. However, you can take the train to Coimbatore then take the bus to Ooty. Alternatively, you can travel from Thrissur to Ooty in around 3 h 21 min.
How to get from Thrissur to Ooty
From Thrisur (TCR) train to Coimbatore then bus to Ooty. 5 h 59 min ₹1,493. From Thrissur taxi to Ooty. 3 h 21 min ₹3,735. From Thrissur drive to Ooty. 3 h 21 min ₹1,729. From Mundur bus to Palakkad then taxi to Ooty. 2 h 54 min ₹1,785.