RT DFW-HKG-Southeast Asia is wide open in October and November. Just booked 2 weeks ago. Your status in Cathay’s FFP may play a role in availability. But, yes, you might to try and book DFW-HKG-XXX and see which city has availability. If lucky, you just have to book a domestic MIA-DFW making sure you don’t book a tight connection. If you get a business class award, then spending 4 hours in AA Flagship Lounges in DFW, and MIA if you book AA for your positioning flight , would be a treat.