So I haven't been to Kunming for almost 2 years. I find the searches I've done regarding the metro rather confusing, not being able to find clear info on what's open and running. I assume the light rail to the new airport is fine, so that takes me as far as the Eastern Bus Station I guess. From there, is there a line going to the Wen Miao area or should I just jump into a taxi?

thats the only line that works. I would suggest a taxi or bus from the airport as being faster and easier. The subway stops at 6pm

A new line will Open in May or June. Testing is still in progress but expect it to be open within the next 3 months at most.