how much the bus fares from West Bus Station to hang zhou aiport? if by taxi is how much?

From the west bus station, there is no direct bus for HZ airport, so you need to transfer at Wulin Square.
From the bus station, you can take a taxi to Wulin Square and then take the airport shuttle bus to the airport. The shuttle bus fare is around 21RMB. Taking taxi costs about 30RMB. If you take taxi directly, the fare is around 150RMB.