I am looking for direct flights to Kunming from an international destination. This is because I do not want to go into quarantine in Shanghai or Beijing first and then again in Kunming.
What are the options? Are there non-stop flights to Kunming from Vietnam, Laos, Myanmar, Thailand, Japan, Taiwan, ...? Any advice is much appreciated!

Wouldn't the best person(s) would be the airlines? They would have the up-to-date information, no?

As far as I know once you passed the entry quarantine you don't need any further quarantine.
Any way you can check direct flights to Kunming yourself with the help of ticket booking sites.
Apparently there are some direct flights but very expensive.

Check flight arrivals at the airport check each day because some flights will not be every day