Take a taxi from Kunming Airport to Nanyao Bus Terminal (it costs about 10 yuan and takes 15 minutes if there is no traffic). There are many buses to Wenshan that run every 45 minutes and the price is 120-180. You can negotiate the price.

(Talk to the driver outside the station), Kunming-Wenshan 6-8 hours.

There are already flights from Kunming to Wenshan. The price is 450-600. You can inquire about the specific time on the second floor of the airport.