The average train between Heathrow Terminal 5 and Parliament Square takes 48 min and the fastest train takes 41 min. The train runs at least 3 times per hour from Heathrow Terminal 5 to Parliament Square. The journey time may be longer on weekends and holidays; use the search form on this page to search for a specific travel date.
Trains run every 20 minutes between Heathrow Terminal 5 and Parliament Square. The earliest departure is at 9:42 AM in the morning, and the last departure from Heathrow Terminal 5 is at 10:12 PM which arrives into Parliament Square at 10:54 PM. All services require a transfer at London Paddington and take an average of 48 min. The schedules shown below are for the next available departures.

42 min • 1 change

47 min • 1 change

42 min • 1 change

47 min • 1 change
Want to know about travelling from Heathrow Terminal 5 to Parliament Square? We have put together a list of the most frequently asked questions from our users such as: What is the cheapest mode of transport? What is the quickest option? How much do tickets usually cost? and many more.
No, there is no direct train from Heathrow Terminal 5 to Parliament Square. However, there are services departing from Heathrow Terminal 5 station and arriving at Parliament Square station via London Paddington. The journey, including transfers, takes approximately 48 min.
Heathrow Terminal 5 to Parliament Square train services, operated by Heathrow Express, depart from Heathrow Terminal 5 station.
Heathrow Terminal 5 to Parliament Square train services, operated by Heathrow Express, arrive at Westminster station.
The distance between Heathrow Terminal 5 and Parliament Square is 25.4 km. The road distance is 34 km.
London Underground (Tube) operates a subway from Heathrow Terminal 5 station to Gloucester Road station every 10 minutes. Tickets cost £15–55 and the journey takes 40 min.