By Bus:

London's bus system is probably the most significant in the world, functioning twenty-four hours a day, with 8,000 buses, 700 bus routes, along with over six million passenger journeys made every weekday. In 2003, the network's ridership was predicted in excess of 1.5 billion passenger journeys per annum, more than the Underground. Close to £850 million is drawn in income annually.

London has the most important wheelchair available system in the world and, from the 3rd quarter of 2007, became a lot more obtainable to hearing and visually impaired travellers as audio-visual announcements were introduced. The unique red double-decker buses are internationally recognised, and are generally a trademark of the London transport system.

Via Car:

Even though the majority of journeys involving Central London are made by public transportation, car travel is common within the suburbs. The inner ring road (around central London), the North and South Circular roadways (in the suburbs), as well as 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 a small number of motorways penetrate into inner London. The M25 is nowadays generally known as the longest ring-road motorway on this planet.

By Air:

Heathrow is the UK's most important international airport and it's also London’s largest. Located on the western borders of the city, Heathrow is also definitely one of Europe’s leading international hubs. Close to 63 million passengers from around the globe travel through Heathrow’s 4 (soon to be five) terminals on a yearly basis. Heathrow is only 15 miles outside the hub of London and is well linked with the public transportation system.

You'll be able to grab the 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 extremely popular London Airports consist of Gatwick and Stansted.