London Gatwick Airport — London, United Kingdom

South of London near the town of Crawley, LGW has long operated as the capital's secondary airport, yet it holds the distinction of running more flights from a single runway than almost any other airport on earth, achieved through tightly scheduled operations across its North and South Terminals. Gatwick opened its current form in stages from the 1950s onward, growing from a modest grass airfield into a major leisure and short-haul hub favored by easyJet, which bases a substantial portion of its fleet there, alongside long-haul operations from British Airways and Virgin Atlantic. A second runway exists but is normally used only as a backup taxiway, part of long-running debates in the UK over aviation capacity in the southeast. Direct rail links, including the Gatwick Express, connect the airport to central London in roughly half an hour, despite sitting farther from the city than Heathrow.