Useful information:
Direct flights from Singapore and Tokyo to Hangzhou are available now. It is very convenient for travelers in the future.

You can choose one of the following routes to arrive in Hangzhou:
1.Arrive at Hangzhou International Airport (Xiaoshan), then take airport bus to Hangzhou.
2.Arrive at Shanghai PuDong International Airport, then take airport bus to Shanghai Train Station, then take train to Hangzhou. From
The trains from Shanghai South Station to Hangzhou is the following:
No: start arrive
K823 9:46 12:06
K825 14:12 16:00
K827 17:27 19:15
3.Arrive at Shanghai HongQiao International Airport, then take airport bus to Hangzhou. The bus schedule from the airport to Hangzhou is 10:30 12:00 13:30 15:00 16:30 18:00 (One bus every one and half hours).
4.Arrive at Beijing International Airport, then change airplane to Hangzhou International Airport .
5.Arrive at Hongkong International Airport, then change airplane to Hangzhou International Airport .

Hi!
welcome to hangzhou first!
there are buses from Hangzhou Airport to the center of the city, and the price is just about 20 RMB,so please no worries!
And for the transportation between hangzhou and Suzhou, of course you can take a train as you mentioned, besides you can take buses or even passenger ships.Some of my friends like that because it would be really interesting!The price for bus is about 50 ，and 65 to 130 for ships
according to the type of your ships.