please tell me top NIT and IIT for btech in aerospace engineering.and also tell me which one of the above has lowest fees in total

As far as I know, there is no NIT that provides Aerospace Engineering, but there are some IITs that do, therefore I'm going to mention some more good institutions in addition to IITs:-

Bombay Indian Institute of Technology

Madras Institute of Technology is an Indian institute of technology located in Madras, Tamil Nadu

Kharagpur Indian Institute of Technology

Kanpur, India's Indian Institute of Technology

Hello Aspirant,

See till now there is no any NIT which offers Aerospace Engineering but yes there are some IITs which offer so I am enlisting down some other good colleges along with IITs :-

• Indian Institute of Technology Bombay
• Indian Institute of Technology Madras
• Indian Institute of Technology Kharagpur
• Indian Institute of Technology Kanpur
• Indian Institute of Engineering Science and Technology Shibpur
• Indian Institute of Space Science and Technology, Thiruvananthapuram
• Indian Institute of Science, Bangalore
• Madras Institute of Technology, Chennai

From the above listed colleges Indian Institute of Space Science and Technology, Thiruvananthapuram has the lowest fee which is INR 2,72,00/-. and among listed IITs, IIT Madras has the lowest fee that is INR 8,04,000/-.

For complete list of colleges offering Aerospace engineering kindly check out the link given below :-

https://engineering.careers360.com/colleges/list-of-engineering-colleges-in-india?ownership=Public/Government&branch=Aerospace%20Engineering

I hope this information helps you.

Good Luck!!