At the time of the opening of Hong KongInternational Airport in 1998, the fleet consisted of 62 Dennis Trident 3double decker buses, of which 11 had Alexander ALX500 bodies and the other 51 had Duple Metsec DM5000 bodies. Ten MAN NL262/Rsingle deckers were added to the fleet in 2006 for use in route A10. Two urban-specification Alexander DennisEnviro500s joined the fleet in 2011, and were repainted with Cityflyer livery but retained their normal seats which differ from the high backed coach seats of the other buses. They were returned to normal Citybus livery in 2013. Another three urban-specification buses joined the fleet in 2012 with a modified version of the Cityflyer livery and still remain in the Cityflyer fleet today as reserves to cover for unavailable coach-specification buses. From 2013 to 2014, the Dennis Tridents were replaced by 66 new 12.0 metre Enviro500 MMC buses. The MAN NL262/R were withdrawn in 2016, and subsequently replaced by the 12.0 metre Enviro500 MMC. Longer 12.8 metre Enviro500 MMC were ordered soon after the 12.0m order. Further orders of the 12.8m Enviro500 MMC were delivered in 2017-2018 to cope with rising passenger numbers on existing routes and the added passenger flows from the Hong Kong-Zhuhai-Macao Bridge. A further 27 are on order, with 6844 being delivered to Hong Kong in mid-2019. All Cityflyer routes with the exception of A10, A17, A23 and NA10 have been cleared to use the 12.8 metre long buses. In 2018, there were 113 buses in all in the fleet.
Routes
Cityflyer operates Airport Routes A10, A11, A12, A17, A20, A21, A22, A23, A26, A29 and A29P, as well as overnight routes NA10, NA11, NA12, NA20, NA21 and NA29. The Cityflyer service is an indirect rival to the Long Win Bus service provided by Kowloon Motor Bus, which operates in the New Territories. On 28 November 2005, the Transport Department of Hong Kong invited tenders for new airport route plying between Hong Kong Southern District and Airport via Mount Davis Road and Kennedy Town. On 23 January 2006, the Transport Department announced that Citybus had won the tender, with route number A10, the fare of which was set as HK$48, surpassing the A12 as the most expensive franchised bus route in Hong Kong. The service on the new route commenced on 26 March 2006. Ten MAN NL262/R single deckers were upgraded to Cityflyer standard, including luggage racks and 33 seats, for use on the new route. This was the only Cityflyer route operated predominantly by single deckers. In April 2016, the last of the MAN NL262s were retired, and their place filled by the 12 metre Enviro500 MMC double deckers.
