Depends on which airline miles you are planning to use.

If it is DL you can do ATL-CDG-BOM and return DEL-CDG-ATL with ATL-CDG in DL and CDG - India in AF

If it is AA you can do ORD-BRU-BOM and return DEL-ORD with ORD-BRU in AA and BRU-BOM in 9W and DEL-ORD in AA direct flight.

AA you can do JFK-BRU-BOM and return DEL-BRU-JFK with JFK-BRU either AA or 9W and BRU-India in 9W.