Great Wall Sheraton to PEK. What is the best way for 8:30 flight? When should I leave hotel?

Since your flight is scheduled at 08:30, you need to reach the airport at least 2.5 hour before the departure, about 06:00. Considering the travel time from the hotel to the airport, I suggest you take a taxi, the fare would be CNY70 – 80, and the travel time is about 35 mins. Both subway and airport shuttle bus are not in service yet that early.

Thank you for your reply. Very helpful.