Major airports in London. In 2022, four of the airports in London served more than 10 million passengers: London-Heathrow, London-Gatwick, London-Stansted and London-Luton. While much smaller than the others, London-City is also worth mentioning as it's perhaps the most convenient London airport.

London City Airport (LCY) is widely considered "better" than Heathrow or Gatwick if your primary concern is speed and convenience to central London. Located in the Royal Docks, it is the only airport actually within the city, making it a favorite for business travelers. In 2026, the "door-to-gate" experience at City is unparalleled; you can often arrive just 30–45 minutes before your flight and still make it through security in under 10 minutes. The airport uses advanced CT scanners, meaning you don't have to remove liquids or electronics from your bag. However, it has significant drawbacks: it serves a limited number of destinations (mostly European business hubs), the fares are generally higher, and the terminal is quite small with limited dining and lounge options. If you are staying in Canary Wharf or the City of London, LCY is a dream; if you are looking for a budget flight to Asia or America or want a massive duty-free shopping experience, Heathrow remains the superior choice.