Airport Express

The MTR’s high-speed Airport Express takes approximately 24 minutes to reach Hong Kong Island and is the fastest way to get between the city and the airport. Airport Express passengers are able to take a free shuttle bus from Kowloon and Hong Kong stations to major hotels. Both these stations also provide free in-town check-in services for major airlines. Please contact your airline for further information.

Airport Express Travel Pass
Purchase a $250 or $350 Airport Express Travel Pass (both include a refundable deposit of $50) to enjoy one or two single journeys on the Airport Express, as well as three consecutive days of unlimited travel on the MTR , the Light Rail and MTR Bus (which operates in the northwest New Territories) ¹  . The ticket is valid for 180 days from the day of issue.

Adult Tourist Day Pass and Child Tourist Day Pass²
Purchase a $65 Adult Tourist Day Pass or $30 Child Tourist Day Pass to enjoy any one day³ of unlimited travel on the MTR⁴ to experience Hong Kong. The ticket is valid for one month from the date of issue.

Please Note:
The above Travel Passes are only available to visitors who are not Hong Kong residents and who have been in Hong Kong for less than 14 days.

1. Does not include additional travel on the Airport Express, East Rail Line First Class, and travel to or from Lo Wu or Lok Ma Chau stations.
2. Valid for children aged 3 to 11.
3. One day of unlimited travel means 24 consecutive hours beginning from the recorded entry time of the first journey.
4. Except the Airport Express, the MTR bus, East Rail Line First Class, Lo Wu Station and Lok Ma Chau Station.​

The Airport Express is one of the lines of the Hong Kong MTR system. It links the principal urban areas with the Hong Kong International Airport and the AsiaWorld–Expo exhibition and convention centre.

It is not primarily a rapid transit or metro line but a premium-fare express service for the airport and exhibition centre. It uses specially designed rolling stockintended to provide levels of comfort similar to that found on an airliner. The average maximum speed between stations is 130 kilometres per hour (81 mph).

It is the only rail link to the airport's terminal. It runs parallel to the Tung Chung Line, a traditional rapid transit line, from Hong Kong Station to just south of the channel between Lantau Island and Chek Lap Kok Island, on which the airport was constructed. The line continues to the airport and terminates at AsiaWorld–Expo. The Tung Chung Line terminates in the adjacent Tung Chung new town, with bus service to various areas at the airport, including the passenger terminals.

The journey from Hong Kong Station to the airport takes 24 minutes. The line is coloured teal on MTR system maps.

History

In October 1989, the Hong Kong government decided to replace the over-crowded Kai Tak Airport, located in Kowloon, with a new airport to be constructed at Chek Lap Kok. The government also invited the Mass Transit Railway Corporation to build an express line to the airport. The project began when the Chinese and British governments settled the financial and land agreements in November 1994.

The Lantau Airport Railway was developed as two separate MTR lines, the Tung Chung Line and the Airport Express, with the two lines sharing tracks in some sections. It cost $35.1 billion. The Airport Express began service on 6 July 1998, the opening date of the new Hong Kong International Airport. The line initially terminated at Airport Station and the entire journey time was 23 minutes.

With the opening of Sunny Bay Station on the Tung Chung Line in June 2005, the total journey time between the Airport and Hong Kong Stations was increased to 24 minutes. With the opening of AsiaWorld–Expo, the line was extended to AsiaWorld–Expo Station on 20 December 2005 and a journey on the entire route takes 28 minutes.

Source https://en.wikipedia.org/wiki/Airport_Express_(MTR)

Source http://www.mtr.com.hk/en/customer/services/airport_express_index_tourist.html