I suggest you wait until June at the earliest to book the US-China portion and July for China-India. Regarding the latter, I monitor ctrip's international fare sales (which are representative of those offered through other channels as well) from time to time and good deals are frequently available. What's more, there are a bunch of options between PEK/PVG and DEL. That said, I sure would focus on the CA nonstop; some people like to transit in SIN, but check out a map and you'll realize why that's not the best course if you value your time.