Special Tourist Cards or Metro Passes are available at Delhi Metro Ticket counters for unlimited travel over short periods on all metro lines except for the Airport Express line. The cost is 100 rupees for one day, and 250 rupees for three days. In addition, a 50 rupee deposit is payable, as cards are required to be returned at the end of travel.
Here are the two types of Metro tourist cards are presently available :-
One Day Card : available at a cost of Rs 150/- (Rs 100 + Rs 50 refundable security).
Three Day Card: available at a cost of Rs 300/- (Rs. 250 + Rs 50 refundable security).