Via Car:

Even though the majority of journeys involving Central London are made by public transportation, car travel is typical while in the suburbs. The inner ring road (around central London), the North and South Circular highways (in the suburbs), plus the outer orbital freeway (the M25, outside the built-up area) encircle the city and are intersected by a number of busy radial routes—but hardly any freeways penetrate into inner London. The M25 is these days referred to as the longest ring-road motorway in the world.

By Bus:

London's bus network is probably the biggest on the planet, functioning round the clock, with 8,000 buses, 700 bus routes, as well as over six million passenger journeys made each and every weekday. In 2003, the network's ridership was estimated at over 1.5 billion passenger trips each year, a lot more than the Underground. Around £850 million is drawn in profits each year. London has the most important wheelchair accessible system on the planet and, from the 3rd quarter of 2007, became much more obtainable to hearing and visually impaired travellers as audio-visual announcements were unveiled. The unique red double-decker buses are internationally recognised, and are a trademark of the London transport system.

By Air:

Heathrow would be the UK's most significant airport terminal and it is London’s largest. Located on the traditional western borders of the city, Heathrow is also without doubt one of Europe’s leading international hubs. Nearly 63 million passengers from across the globe travel through Heathrow’s 4 (soon to be five) terminals per year.

Heathrow is only 15 miles outside the hub of London and is well linked with the public transportation system. You can go ahead and take Heathrow Express train to/from Paddington Station in the centre of London. The tube also provides 2 stations for Heathrow on the Piccadilly Line, which link directly from Kings Cross. Other very popular London Airports are made up of Gatwick and Stansted.