What Do The Routes Translate To in the Huanglong Scenic Area?

You may mean the recommended travel routes. Chengdu, Mianyang, Maoxian, Zhaohua, Wenchuan and Wenxian are the cities, towns or counties of Sichuan provinces. And Huanglong, Muni Valley and Jiuzhaigou can present you attractive scenery with their charms.
Buses are all available among the places from one to another. So transport will not be a problem.

Also, where is the airport

There are direct buses at the scenic area taking you to Jiuhuang Airport.

I flew from Chengdu on a flight that was an hour and 45 minutes. The bus ride took five hours to get to Huang Long "Yellow Dragon" scenic area. Took a gondola ride up the mountain then a hike for 45 minutes to get to the scenic area. Then hiked up to see the pools of water than hiked all the way down to the bottom. Took maybe three hours. Then back on the bus to Jiuzhaiguo which took several hours and was after 10:00 PM when we arrived. Stayed at a hotel of an American company and was able to eat at the hotel even though it was late. In the morning we went into Jiuzhaigou and there are no private vehicles, only busses. The park is beautiful and few Westerners have the opportunity to see this place. Lunch was interesting in the canting (restaurant) and definitely a Chinese experience. Jiuzhai is incredible! I was there in July and I want very much to return in fall. If you can go in September or October I think is the best. YOu really have to take a commercial flight then the bus. Driving from Chengdu I think is not advisable. I don't remember but I think the trip for two people cost me $1,100.00 USD from Chengdu.