Keep in mind that when a flight exceeds 10-12 hours, the carrying cost of the fuel load exceeds the costs saved by not making an enroute stop. So the only way AA is making money on ORD-DEL is if they get a strong mix of premium traffic, which isn't necessarily a given (especially because domestic connections in DEL are a total mess).

I wouldn't rule out UA flying to India someday, but if there was a goldmine opportunity that could be served with the aircraft in the fleet, I think UA would already be offering service. Will be interesting to watch for sure!