This one is simple to find on the “other” alliances but harder to find on Skyteam and Delta metal. HT to FT on this thread and it is proving a challenge to find on ITA Matrix, Google Flights and Kayak.com the normal search spots to first find flights before jumping over to Delta.com to do the final search and booking. Anyway, it is a LOT of time in coach, a few hours sleep in HKG before the turn back. I would rather, if I were to do one of these, look at the Australia one that can be had for under $1,100. Then again, that one is NOT out of Chicago so:
18,588 MQMs at 4.9 CPM
Bookable on Delta.com
DM yields an HUGE 41,828 Skymiles per CWSI.net!
Also just like SYD run I would consider using GU certs if you are a DM and looking to “enjoy” this long run!