There’s no direct bus for tirthan.
How to reach tirthan valley from Delhi.
Take a night bus for Aut. You will reach there in the morning. Then there are two options for travelling to tirthan valley-
1. Local bus to jibhi( I prefer local travelling). Bus will cost you around ₹50/person.
2. Take a direct taxi to jibhi. Taxi will cost around ₹500-₹800(depending on the bargain).
Jibhi is a beautiful and secluded place in tirthan valley where you can stay for a day or two.