Belfast International Airport — Belfast, United Kingdom

Belfast International Airport, coded BFS, sits near the village of Aldergrove in County Antrim, roughly 15 miles from Belfast city center, and was known for years simply as Aldergrove Airport before adopting its current name. Two runways handle the airport's traffic at an elevation of 268 feet, supporting routes across the United Kingdom, Ireland, and destinations in continental Europe. The site began life as a military airfield, and an active British Army base still shares the airfield grounds alongside the civilian terminal today. BFS operates separately from George Best Belfast City Airport (BHD), a smaller field much closer to downtown Belfast and named for the famous footballer, a distinction that regularly trips up travelers booking flights to Northern Ireland. Aldergrove's location away from the city center gives BFS room for longer runways and larger aircraft than its city-center counterpart can accommodate. As Northern Ireland's larger of the two Belfast airports, BFS handles the bulk of low-cost carrier and international traffic serving the region.