Delhi to Howrah Route via Kanpur, Prayagraj Jn is the most busiest train route in India.
From Delhi to Kolkata the most trains operate for the city of Kanpur, Prayagraj on the Howrah route. A total of approx 88 trains operate in between the capital city of Delhi and Kanpur. However, this includes trains that run one, two, and three days a week. If we talk about daily running trains, this number is 57.
Vande Bharat, Shatabdi, Rajdhani, and Gatimaan, all categories of trains are included in the trains running on the New Delhi-Kanpur route then Prayagraj, Kolkata
⭐The other top busiest train route on the based on passenger traffic, no. of trains operating:-
1. Delhi to Mumbai (WR) via Kota, Ratlam, Vadodara & Delhi to Mumbai (CR) via Bhopal, Khandwa Jn, Manmad
2. Mumbai to Howrah Via Bhusawal, Nagpur, Raipur and Chennai to Howrah via Vijayawada, Bhubaneswar (East Coast)
4. Delhi to Chennai Route via Bhopal, Nagpur Vijayawada
5. Mumbai to Ahmedabad & Pune to Ahmedabad via Kalyan, Vasai Road
6. Chennai to Mumbai Route via Arakkonam Renigunta Jn, Guntakal, Solapur
9. Patna-Lucknow/Varanasi Route
10. Howrah-New Jalpaiguri Route
11. Howrah-Gaya/Patna Route
12. Hyderabad to Visakhapatnam via Warangal, Vijayawada
13. Chennai to Bengaluru Route via Katpadi Jn, Jolarpettai Jn
14. Chennai to Kanyakumari Route via Chord Line Villupuram, Trichy, Chennai to Coimbatore via Salem, Erode
15. Mangalore Central-MGR Chennai Central & Thiruvanthapuram Central- MGR Chennai Central Route via Ernakulam, Palakkad Jn,
15. Thiruvananthapuram Central-Bengaluru Route via Ernakulam, Salem
16. Thiruvananthapuram Central-Mangalore Central
Source: India . com site