Originally Posted by
UrbanLegend179
When is the best time to go in terms of avoiding turbulence since I am guessing its related to weather?
If air travel related turbulence could be predicted/mapped and avoided, we would already had it. We don't.
I would suggest not to worry too much. Intra-Asia flights from your list are 2-4h in length (assuming that you are flying from Japan to Korea or Thailand and then to Singapore).
All my personal experience with turbulence was on Europe-Singapore flights and way before reaching SEA region.