The main airport in London is Heathrow Airport (LHR). It is the busiest airport in the UK and one of the busiest in the world, serving as a major international hub.
Which airport is best for international flights
If you’re traveling internationally, Heathrow is likely your best option.
Which airport is best for budget airlines
Stanstead (STN) & Luton (LTN) – Best for Budget International Flights
Which airport is best for business travellers
London City Airport (LCY) – Best for Business Travellers