how long does it take by subway from airport to beijing west station?

If you use subway, the fare is CNY30, and the travel time is about 65 – 70 mins. The transfer route is like this: Take the Airport Express to Dongzhimen Station, where you can transfer to line 2 to Xizhimen Station. Then transfer to line 4 to National Library, where you can transfer to 9 to the west railway station.

Considering the troublesome transfer procedures, you are suggested to take the shuttle bus line 7 to the train station directly. The fare CNY24, and the travel time is about 1 hour.