Crazysah,

As others have pointed before , * alliance will suit you the best. Don't think too much about it, they are talking from their experience and knowledge. The best route and flights may be subjective terms. Will be you be willing to spend extra $'s to get a particular route? Best flight doesn't really translate to what you will need? Best flight doesn't really mean Best airline program to collect miles into.

Since you will be traveling 3 times, you will get ample opportunity to test yourself and see which one is best.

If you want to do some spade work look at airlines flying to delhi from NYC and see where they connect. Search on any search engine like kayak.com and see connections.