From Delhi Airport

Travel instructions to reach Conference Venue from Delhi Airport:

You can directly book a cab auto from Indira Gandhi International (IGI) Delhi Airport to Conference Venue (Gate no. 4, Faculty of Science, Delhi University, North Campus, Delhi).
The total fare in the cab (via Uber will be 400-500/-)approximately (prices are subject to change).
The total travel time will be approximately 1 hour.
BY METRO

There is an inter terminal shuttle bus free of use that connect T1 and T2 to T3 terminals. Frequency is every 20 minutes.
To Get Airport metro is easy on T3, you have to just follow the sight on arrival hall and you can reach it by walk.
First train departs at 4:45am from New Delhi Airport and last train departs at 11:30pm from both sides of the line, with a 15-minute frequency. It takes approximately 19 minutes from Terminal 3 to New Delhi-Airport Express.
Frequency is every 15 minutes on non-peak times and every 10 minutes on peak times.
Non-Peak hours: 5:30am to 8:30am; 10:30am to 5:30pm and 8:00pm to 11:30pm. Peak hours: 8:30am to 10:30am; 5:30pm to 8:00pm.
Now, head towards entrance gate of IGI Airport metro station and board the (Orange Line) metro train going towards New Delhi-Airport Express at Platform 3 on IGI Airport metro station.

After 3 intermediate stops, change the metro train at New Delhi-Airport Express metro station (Orange Line) and board the (Yellow Line) metro train going towards Vishwavidyalaya/ Samaypur Badli at Platform 2 on New Delhi metro station.
After 5 intermediate stops, deboard the metro train at Vishwavidyalaya metro station and take an exit from Gate no. 4.
Now, take an e-rickshaw for the Conference Venue (Gate no. 4, Faculty of Science, Delhi University, North Campus, Delhi) which will cost 20/-.
The total time travel will be approximately 1 hour.