Delhi Airport Buses
The bus service is the most common and the cheapest way to travel around the city, there are public buses (DTC, Delhi Transport Corporation) and private contractors.
DTC offers a shuttle-bus service every 30 minutes that connects the airport with central parts of New Delhi (Interstate Bus Terminal and Connaught Place).
For further information about routes and schedules, please check the following website.
All buses operating at Terminal 3, can be found at the 'staging area' opposite the Centaur Hotel. Use the Dial inter-terminal shuttle bus to reach Terminal 3.
Tip: Be aware since buses can be really crowded and could be difficult to use them if it is your first time in the city.