London Heathrow airport
From Heathrow by train
The Heathrow Express is the fastest way to travel into Central London. Trains leave Heathrow Airport from approximately 5.12am until 11.40pm. Operating 150 services every day, Heathrow Express reaches Heathrow Central (Terminals 1 and 3) from Paddington in 15 minutes, with Terminal 5 a further four minutes. A free transfer service to Terminal 4 departs Heathrow Central every 15 minutes and takes four minutes.
Heathrow Connect services run from London Paddington, calling at Ealing Broadway, West Ealing, Hanwell, Southall, Hayes & Harlington and Heathrow Central (Terminals 1 and 3). For Terminals 4 and 5, there's a free Heathrow Express transfer service from Heathrow Central. Heathrow Connect journey time is about 25 minutes from Paddington to Heathrow Central. For more information, and details of fares, visit the Heathrow Connect website.
From Heathrow by tube
The Piccadilly line connects Heathrow Airport to Central London and the rest of the Tube system. The Tube is cheaper than the Heathrow Express or Heathrow Connect but it takes a lot longer and is less comfortable.
Tube services leave Heathrow every few minutes from approximately 5.10am (5.45am Sundays) to 11.35pm (11.25pm Sundays).
The journey time to Piccadilly Circus is about 50 minutes. There are three Tube stations at Heathrow Airport, serving Terminals 1-3, Terminal 4 and Terminal 5.
For more information, and details of fares, visit the Transport for London (TfL) website. If you're going to be using London's public transport system, it's worth buying an Oyster card.