India

You can pursue post graduate diploma in the same specialization.

Hello Shrutika
Please go on below link for the best colleges in aviation
https://hospitality.shiksha.com/bba-in-aviation-in-maharashtra-categorypage-6-87-265-0-0-1-114-2-0-none-1-0

Please specify your academic background and the program you are planning to enroll into.

Delhi School of Economics Is the only post-graduation college under University of Delhi for economics, commerce and geography.

You can choose finance, marketing, HR, IB, risk management or power management.

Through distance learning the best colleges for MBA would be Symbiosis Pune, IMT Ghaziabad, Sikkim Manipal University, IGNOU, ICFAI Business School Hyderabad, Annamalai University, Alaggapa University Tamil Nadu, Bharathidasan University. These are good universities for distance education. Some of these have online courses which you can pursue simultaneously with your job.

You need to make a routine of all subjects and study each subject each day for minimum 1 hour daily.

Yes, America is a good option to pursue aeronautical engineering but you should not rule out the option of studying from India as well. India is a growing country in this field and people are getting very good pay as well. I can list down a few colleges I know of in India:
• Indian Institute of Aeronautical Engineering, Dehradun
• Indian Institute of Space Science and Technology, Thiruvananthapuram
• PEC University of Technology, Chandigarh
• Sathyabama University, Chennai
• UPES, Dehradun