You can go nonstop with delta from mid August and onward and it is a little cheaper if you fly via NRT . Something you may not know is there have been reports of being able to use the virgin Atlantic lounge (premium lounge where you can order food ) with sky team elite plus status (delta gold and above ) which would make this trip much more pleasant.
Example date is shown above. Pretty obvious make sure you signup up for delta FF before you fly on this ticket . I think it is best to buy this ticket with the chase sapphire (via the ultimate reward for an extra point via Expedia) for a total of 2 points or 3 points if you used the ultimate reward portal . Hong Kong is a great start to your Asia trip!