Dear apprentice,
According to Glassdoor the average salary of a aerospace engineer is around 7 lakhs per annum. And they also have some allowances like retirement plan and medical benefits. As a fresher you can expect 300k to 400k per year.

Hello Adarsh,
Aerospace engineering is a good field and from few many people are opting this field in their B.Tech course. There are many good opportunities for a aerospace engineer. One who do Master's i.e., Post graduation (PG) in aerospace engineering have the good respect and can get good package annually.
The average package for one who did his Master's degree in Aerospace engineering can get INR of 60 lacs.
I wish you good luck. Contact for further help.