From Patna to Chennai, 22353/Patna-Bangalore Premium takes just 15 minutes less than 22644/ Patna-Ernakulam.
Patna to Bangalore can easily be covered in 35-40 hours if passed via:
1. Chheoki - Jabalpur- Nagpur- Hyderabad - Anantppur.
2. ECoR division (via Gaya- hijli- Bhubaneswar- Visakhapatnam/Duvvada - Vijayawada- Katpadi)