Alderney Airport (IATA: ACI, ICAO: EGJA) is the only airport on the island of Alderney. Built in 1935, Alderney Airport was the first airport in the Channel Islands. Located on the Blaye (1 NM (1.9 km; 1.2 mi) southwest of St Anne), it is the closest Channel Island airport to the south coast of England and the coast of France. Its facilities include a hangar, the Airport Fire Station and low cost, duty-free and tax-free Avgas refuelling. In 2009 the airport handled 74,835 passengers and 8,284 total movements , a 3% and 6.1% decrease respectively when compared to the 2008 figures.

Alderney is unique amongst Channel Islands airports, in having three operational runways. The main runway, 08/26 is 880 m (2,887 ft) long and is mainly asphalt. The two secondary runways are both grass. 14/32 being 732 m (2,402 ft) long, with 03/21 having a length of 497 m (1,631 ft). The main runway is equipped with low intensity lighting, with portable lighting being available on runway 14/32. The approach and runway lights were replaced in 2006 by Ian Tugby (States of Alderney member), a local building contractor.

Alderney (French: Aurigny; Auregnais: Aoeur'gny) is the most northerly of the Channel Islands. It is part of the Bailiwick of Guernsey, a British Crown dependency. It is 3 miles (4.8 km) long and 1.5 miles (2.4 km) wide. The area is 3 square miles (7.8 km²), making it the third-largest island of the Channel Islands, and the second largest in the Bailiwick. It is around 10 miles (16 km) to the west of La Hague on the Cotentin Peninsula, Normandy, in France, 20 miles (32 km) to the north-east of Guernsey and 60 miles (97 km) from the south coast of Great Britain. It is the closest of the Channel Islands to both France and the United Kingdom. It is separated from Cap de la Hague by the dangerous Race of Alderney (Le Raz Blanchard).

The island has a population of only 2,400 people and they are traditionally nicknamed vaques after the cows, or else lapins after the many rabbits seen in the island. Formally, they are known as Ridunians, from the Latin Riduna.

The only parish of Alderney is the parish of St Anne, which covers the whole island.