The average bus between Trafalgar Square and Harpenden takes 2h 21m and the fastest bus takes 1h 50m. There is an hourly bus service from Trafalgar Square to Harpenden. The journey time may be longer on weekends and holidays; use the search form on this page to search for a specific travel date.
Buses run hourly between Trafalgar Square and Harpenden. The earliest departure is at 6:05 AM in the morning, and the last departure from Trafalgar Square is at 9:47 PM which arrives into Harpenden at 12:00 AM. All services require a transfer at Marble Arch Station / Park Lane and take an average of 2h 21m. The schedules shown below are for the next available departures.


2h 28m • 2 changes


2h 22m • 2 changes


2h 23m • 2 changes


2h 18m • 2 changes


2h 48m • 2 changes


2h 17m • 2 changes


2h 37m • 2 changes


2h 26m • 2 changes


1h 53m • 2 changes


1h 53m • 2 changes


2h 19m • 2 changes


2h 12m • 2 changes
Want to know about travelling from Trafalgar Square to Harpenden? 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 bus from Trafalgar Square to Harpenden. However, there are services departing from Trafalgar Square station and arriving at Harpenden station via Black Boy PH. The journey, including transfers, takes approximately 2h 21m.
Trafalgar Square to Harpenden bus services, operated by London Buses, depart from Marble Arch station.
Trafalgar Square to Harpenden bus services, operated by London Buses, arrive at Old Cock Inn station.
The distance between Trafalgar Square and Harpenden is 37.8 km. The road distance is 54 km.
You can take a vehicle from Trafalgar Square to Old Cock Inn via Trafalgar Square, Marble Arch, and Black Boy PH in around 2h 12m.