Route 500, or Glasgow Airport Express is a bus route in Glasgow that operates between the city centre and Glasgow Airport.

The service was originally known as Glasgow Shuttle and was introduced January 2011.

A new fleet of ten Alexander Dennis Enviro200 MMC single-decker buses entered service on the route on 21 July 2016.

[1][2] On 14 April 2019, ten new Alexander Dennis Enviro400 City double-decker buses entered service on the route[3][4][5] On the 31 December 2024, a petition to extend the bus route to connect East Renfrewshire to the airport was launched.