Heathrow has three rail services to/from central London. The Heathrow Express, Heathrow Connect, and the London Underground ("the Tube").
The Heathrow Express provides a high speed non-stop service between London Paddington Station and Heathrow Airport.
There are two Heathrow Express stations at the airport -- Heathrow Central (for Terminals 1, & 3), and Heathrow Terminal 5. Passengers for Terminal 4 should change to the free transfer train service at Heathrow Central Station. Train transfer between terminals is free.
Trains run every 15 minutes throughout the day. Journey time to Heathrow Terminals 1 & 3 is 15 minutes, to Terminal 5 is 21 minutes.
The first Heathrow Express train leaves Paddington at 05:10, the last 23:25 (11.25 pm). The first train leaves Heathrow Terminal 5 at 05:07, the last 23:42 (11.42 pm).
Heathrow Express trains leave from platform 6 or 7 at Paddington station.
Fare: One way £18.00, return/round trip £32.00.
First class: £26.00, return/round trip £50.00.
Tickets can be purchased at Paddington and Heathrow stations or on board the train with cash or credit card.
Online ticket bookings, saver fares and further information at Heathrow Express.
The Heathrow Connect train also serves London Paddington Station. It stops at five stations - Hayes & Harlington, Southall, Hanwell, West Ealing and Ealing Broadway - en route to/from Paddington.
Trains call at Heathrow Central (for Terminals 1 & 3), and Heathrow Terminal 4. For Terminal 5 use the free transfer train service at Heathrow Central Station.
Trains operate every 30 minutes, with a journey time between Paddington and Heathrow of about 25 minutes.
The first train leaves Paddington at 04:42, the last 23:03 (11.03 pm). On Sundays the first departure is 06:12.
The first train leaves Heathrow Terminal 4 at 05:23, the last 00:01 (12.01 am). On Sundays the first departure from Terminal 4 is 06:07.
The fare between Paddington and Heathrow is £8.50 one-way, £16.50 return/round trip.
Tickets can be purchased at Paddington and Heathrow stations or online.
Online ticket purchase and further information at Heathrow Connect.
More information on all UK rail services including Heathrow Airport trains is available at National Rail.
The London Underground Piccadilly Line provides a regular service to all Terminals at Heathrow Airport.
There are three Underground stations at Heathrow - Terminal 4, Terminal 5, and a single station serving Terminals 1 & 3.
The first train from central London leaves Piccadilly Circus at 05:47, the last at 00:21 (12.21 am).
The first train from Heathrow leaves Terminal 4 at 05:02, the last at 23:35 (11.35 pm).
Trains run every 3-7 minutes depending on time of day. Average journey time is 45-60 minutes.
Fare to/from central London (Zone 1) is £5 one-way.
For more information on the London Underground.