London Heathrow is the busiest airport in Europe and second only to Dubai for international passengers — remarkable for an airport working with just two runways, which it operates close to full capacity all day. It is the primary hub of British Airways and a base for Virgin Atlantic. The current schedule feed lists 238 airports in 90 countries connected to London.
Because it sits inside Greater London, arriving aircraft descend directly over the city, and the Piccadilly line runs from central London straight into the terminals.
London Heathrow Airport is the 7th busiest airport in the world — it handled 84,482,126 passengers in 2025, according to ACI World's annual ranking.
The most frequently served routes for London Heathrow Airport connect to Lisbon (LIS), Dublin (DUB) and New York (JFK).
The longest connected route for London Heathrow Airport reaches Sydney (SYD). This flight covers a distance of 10,576 miles (17,021 km).