How to take Airport Express shuttle bus from Ramada Kowloon Hotel to Kowloon Station then to HKIA?

You may take free shuttle bus line K4 to Kowloon Station, adn then take AE line to HKIA. You need to show an AE train ticket, Airline ticket / boarding pass, Airport Staff Octopus Card, AsiaWorld-Expo entry pass or event ticket before getting onto the bus.

I heard that you can also take the bus if you haven't got an AE train ticket. Just show the attendants an airline ticket/ boarding pass of the same day, and buy an AE ticket after getting off the bus.