I actually found one for $392 RT, dates were March 25 - April 12, 2019 (see screenshot).
Both China Eastern and China Southern have round trip airfares travelling from Los Angeles (LAX) to New Delhi India (DEL) for $531, making 1 stop. Price, Duration of Flight, OTA and Stopover city will depend on the airline you choose. I do believe China Southern is a higher rated airline than China Eastern, if you wanted to know.
Departs LAX: March 11, 17, 25, 26, 27; April 1, 3, 8, 29; May 3
Returns: good availability returns, and the best will be 8-11 days duration.
To book this, enter travel information on Skyscanner [skyscanner.com]
and then select your flights and favorite OTA to book with. For hotels, check out Hotwire's Hot Rates [hotwire.com] [hotwire.com]
hotels or look for latest promotions here [hotels.com]
New Delhi Travel Guide [skyscanner.com]