Speed and Convenience: The Airport Express is the fastest way to travel between HKIA and downtown Hong Kong, taking only 24 minutes to travel the 35-kilometer distance. The trains run every 10 minutes, so you won't have to wait long for your train. Comfort: The trains are clean, modern, and comfortable, with ample space for luggage. The seats are designed for maximum comfort, and there is free Wi-Fi available onboard.