Hey.

Here are a few good colleges for Aeronautical Engineering in South India other than IITs you can visit the link below for a more comprehensive list.

Indian Institute of Space Science and Technology, Thiruvananthapu..

Dayananda Sagar College of Engineering, Bangalore

Madras Institute of Technology, Chennai

 Manipal Institute of Technology, Karnataka

 Amrita Institute of Technology and Sciences - Tamil Nadu

 Sathyabama University

 Acharya Institute of Technology

MS Ramaiah University of Applied Sciences, Bangalore

 Amrita School of Engineering  

https://engineering.careers360.com/colleges/list-of-aeronautical-engineering-colleges-in-india