Glasgow Airport (GLA) does not operate its own dedicated "internal" airport shuttle because the terminal is a single, integrated building, but it is exceptionally well-served by external shuttle and bus services. The most famous and frequent service is the Glasgow Airport Express (Service 500), which acts as a high-speed shuttle between the airport and the city center, running 24 hours a day and departing every 12 to 15 minutes. For those staying at nearby airport hotels—such as the Premier Inn, Holiday Inn, or Courtyard by Marriott—most are within walking distance, but some offer their own private shuttle vans for guests with heavy luggage. Additionally, there is a dedicated shuttle service connecting the airport to the nearby Paisley Gilmour Street railway station, which takes about 10 minutes and provides a seamless link to the wider Scottish rail network. For passengers with limited mobility, the airport provides a complimentary "Special Assistance" shuttle within the terminal and between the car parks and the main entrance. While there is no "shuttle" in the sense of a train between terminals like at London Heathrow, the various bus and coach links make Glasgow Airport one of the most accessible airports in the UK for transit to the city and beyond.