So I've got a question. Will something like this even be possible to do? I live in Atlanta. I would want to fly to lax and then take China Southern to Hong Kong for about 3 nights. Then from Hong Kong I want to take china southern to tokyo (nrt) for another 3 or 4 nights). Finally from nrt fly back to Atl on Korean airlines. Could this actually work? And could it be possible to do something like this for 70k miles in Econ or 120k in business? I'm not looking at booking anything yet but once I save up enough (trip for 2) this is one of my top places I want to see (tokyo and Hong Kong) and would love to be able to combine it. And how much in taxes does something like this (just guess) come to? I've got nearly 300k miles saved up and have yet to ever redeem it. I'd prefer to save as many as possible for future trips. Still new to all this only started around a yr ago.

ATL-LAX-CAN-HKG-NRT-ATL should totally be bookable if you can find availability and a competent phone agent. Both are difficult, but it's seemingly legal as the pricing to northern asia and southern asia is the same.

Since the OP is using partner flights except for ATL-LAX, it would all book at low (or not at all) except possibly for an additive domestic ticket if ATL-LAX isn't in low.

The problem might be getting CAN-HKG space. It looks like there's just one CZ flight on that route and often not two seats in either economy of biz. However, it looks like you can probably get one in economy and one in biz.

For HKG-NRT(stop)-ATL, watch the segment limits. You should be OK HKG-CAN-NRT-ICN-ATL, but if you can't get ICN-ATL non-stop, you're in trouble since you only get four segments each direction.

For an hr flight my friend can suffer coach, lol. And availability is usually good for icn to atl non stop. For all that traveling I am thinking its worth it to get business. I've never seen business class posited on deltas website. Is that expected and you gotta call, or should it be on their?

Business class award space, when it exists, shows on DL.dumb for supported carriers. (DL/AF/KL/AZ/VA/KE/HA/AS…used to be AM, but I've seen some reports of issues on that front.) For CZ, you definitely have to call.