(GMT)09 SEP 2017 GOP3D:
How to get Son Doong Cave
By train: Day or night trains from Hue, you will get to Dong Hoi city about 3.5 hours
By night bus: Sinh cafe, Hung Thanh, Trekking, Camel
And buy daily tour to Phong Nha Cave and Paradise Cave
By train: Night trains start in Hanoi, you will get to Dong Hoi city about the next morning.
By air: There are 4 flights per week (Tue, Thu, Sat, Sun)
By night bus: Sinh cafe, Hoang Long, Camel bus, Hung Thanh, Trekking
There are 4 flights per week (Sat, Sun, Tue and Thur)
From Dong Hoi to Phong Nha:
Follow the link and it will show a map.
Best time to travel: From February to August