Renaissance Beijing Wangfujing to PEK

You are suggested to go to the airport 2 hours early, as I know, the taxi may take 50 minutes, so you need to leave around 18:00. But considering the rushing hour, you may leave around 17:00. It costs CNY90-100.

Or you can walk to Wangfujing Street Station, which is about 400 meters south to your hotel. Then take Shuttle Bus Line 13 to the airport, which takes about 1 hour and CNY25 for each.