Delhi to Prayagraj by Road
Here is a route that you can follow
Route 1: Delhi - Faridabad - Mathura - Agra - Etawah - Kanpur – Prayagraj
Route 2: Delhi - Faridabad - Agra - Etawah - Lucknow - Raerbareli – Prayagraj
Buses from Delhi to Prayagraj are a convenient as well as budget option with frequent services. You can either rent a Bus in Delhi or go with local buses that leave from ISBT Kashmere Gate or Anand Vihar Terminal and take around 10 to 12 hours to reach Prayagraj.
https://indiatourtaxi.com/delhi-to-prayagraj.html