An airport bus, or airport shuttle bus or airport shuttle is a bus or coach used to transport people to/from, or within airports. These vehicles will usually be equipped with larger luggage space, and incorporate special branding.

Airport buses have been in use since the 1960s, when nationalised operator British European Airways employed the archetypal London red Routemaster buses in a blue and white livery with luggage trailers on service to Heathrow Airport.

There are several types of airport bus operation:

Bus transport within an airport may take the following forms, and be operated by the airport owner, an airline, or a contractor to either.

In the cases where airports do not use a jet bridge, for long distance transfers or for reasons of safety, passengers will be transferred from the airport terminal arrival or departure gate to the aircraft using an airside transfer bus or apron bus.

Airside transfer buses can be of normal bus design, or due to not running on the public highway, can be extra long and wide, to hold the maximum number of passengers. Sometimes a trailer bus is employed. Transfer buses are usually fitted with minimal or no seating, with passengers standing for the journey. Transfer buses will usually be fitted with flashing beacons for operating airside near runways. They may also feature driving cabs at both ends.

Gatwick Airport (IATA: LGW, ICAO: EGKK) is located 3.1 mi (5.0 km) north of the centre of Crawley,West Sussex, and 29.5 mi (47.5 km) south of Central London. Also known as London Gatwick, it is London's second largest international airport and second busiest by total passenger traffic in the United Kingdom after Heathrow. Furthermore, Gatwick is Europe's leading airport for point-to-point flights and has the world's busiest single-use runway averaging 52 aircraft movements an hour. Its two terminals – North and South – cover an area of 810,000 sq ft (75,000 m²) and 1,300,000 sq ft (120,000 m²) respectively.

In 2011, over 33.6 million passengers passed through Gatwick.

Charter airlines generally prefer Gatwick over Heathrow as a base for London and the South East of England. From 1978 to 2008, many flights to and from the United States used Gatwick because of restrictions on the use of Heathrow implemented in the Bermuda II agreement between the UK and the US.. Under the agreement Heathrow allowed the right for only two US carrier and two UK carrier to serve flights to the United States. Currently, US Airways is the only US carrier that still serves Gatwick from the US. The airport is a base for scheduled operators Aer Lingus, British Airways (BA), EasyJet, Flybe, Monarch Airlines and Virgin Atlantic, as well as charter airlines including Thomas Cook Airlines and Thomson Airways. Gatwick is unique amongst London's airports in having a significant airline presence representing each of the three main airline business models: full service, low/no frills and charter. As of January 2011, these respectively accounted for 37, 51 and 12% of total passenger traffic.