Southern flys 777's to HKG for DHL but it will require a stop prior and about 24 hours on the plane. One route leaves CVG and stops for a few hours in Bahrain. The other leaves LAX and stops in Germany. You'll be well fed and can drink all the Diet Coke you can handle. Lol
Usually just one leg on the way back HKG/LAX or HKG/CVG.
http://www.southernair.com/supernumerary-travel