As noted, be careful of who owns the metal, as that can affect your miles, EQMs, etc. I don't know if these maps are UA-only.

These are also outdated, as United just started SFO-Nagoya, Japan and I think SFO-Guangzhou is very soon.

For SFO, you have at least (sorry don't know all the codes off the top of my head):

NRT
Nagoya
Kansai (Osaka)
PEK
PVG
HKN
SYD
Seoul (not sure whose metal)

As on the map, Seattle is NRT only

ORD is PEK, NRT and it shows Osaka & HKN