Dear Kaustubh,

You can check the below colleges in which you can apply other then IITs

SRM University, Chennai

RV College of Engineering, Bangalore

Manipal Institute of Technology, Manipal

Indian Institute of Science, Bangalore

Indian Institute of Engineering Science and Technology Shibpur

Birla Institute of Technology, Mesra

Amrita School of Engineering, Coimbatore

SASTRA University, Thanjavur

Lovely Professional University, Phagwara

To check the complete list you can refer below link

https://engineering.careers360.com/colleges/list-of-engineering-colleges-in-India?f%5B0%5D=sm_course_offered%3AAeronautical%20Engineering&f%5B1%5D=sm_course_offered%3AAerospace%20Engineering

Good Luck!!