30 of us wish to travel from Indira Gandhi Intenatonal(New Delhi) airport to Chandigarh by AC bus.?

How much time does it take to travel from New Delhi to Chandigarh and what is the cost for hiring a 40 seater private AC bus for the journey? Also any better options to travel from Delhi to Chandigarh? (other than by domestic flight). How about trains between New Delhi and Chandigarh? What are their timings?