London has four major airports that work 24/7 and serve tens of thousands of passengers a day. They're in various parts of the city and we'll briefly tell you about each one.
The largest airport in Great Britain, and the second busiest airport in the world, is Heathrow. It's 23 km to the west of central London and connected to the Piccadilly Underground line. 84 airlines work at Heathrow. It specializes in long distance flights, but also has European and domestic flights. It sees about 80 million passengers a year, of which 94% are international ones and only 6% are domestic.
This is the second busiest airport in Great Britain. It's 47.5 km to the south of London and you can get there on the Gatwick Express train, in a car, or on a National Express bus. Gatwick is currently used as a base for London charter flights and for the south-east part of the country. Its largest airline partners are British Airways and the cheap Easy Jet airline, which may offer the cheapest flights to continental Europe.
This airport is the third largest in the country and in the city. It's 68 km to the north east from London. You can get to the city on the Stansted Express train, in a car, or on the TerraVision bus from the Liverpool Street station. Stansted has European and domestic affordable flights and is one of the main terminals for private and freight planes.
» READ MORE - How to get from Stansted airport to London
The fourth largest London airport is at the edge of Luton, 45 km to the north from London. It's the hub for Easy Jet, Silverjet, Ryanair and many other airlines. Most of the flights here go to Europe, although there are also charter flights to North Africa and Asia. You can get to London on the East Midlands Trains, the National Express, Green Line and EasyBus or in a taxi which you can book using this link. You can also rent cheap cars.
When it's time to go home, we recommend using public transport from the city to the airport.
We hope this information has been helpful and will help you plan your trip.
Have a nice flight!