Landmark: Katwaria Sarai Bus Stand / Indian Bank.
Nearest Metro Station: Hauz Khas (exit gate 1) and Munirka (Take auto to ISI Delhi/Landmark from here).
From Airport/Railway Station/ Bus Stand: The most reasonable option is to take a auto/taxi (prepaid/app based taxis like Uber, Ola, BluSmart, etc) for ISI Delhi/landmark.
Public Transport
Terminal 1 (Airport): One can take a metro to Munirka (Magenta line) and then an auto/bus to Katwaria Sarai Bus Stand.
Terminal 2/3 (Airport): Frequent buses are available from Terminal 2/3 to Terminal 1, then one can take the route suggested above. Another way is to take an airport express metro to New Delhi, then take metro from New Delhi to Hauz Khas (Yellow line). Then an auto/bus to Katwaria Sarai Bus Stand (which will be longer).
From New Delhi Railway Station: Direct metro to Hauz Khas (Yellow line), then auto/bus for Katwaria Sarai Bus Stand.
Other Nearby Railway Station: Hazrat Nizamuddin, Anand Vihar, Old Delhi Railway Station.
For more information, visitors can utilize the available routes provided in the following link.