The average bus between Heathrow and Welwyn takes 3h 22m and the fastest bus takes 2h 45m. There is a bus service every few hours from Heathrow to Welwyn. 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 Heathrow and Welwyn. The earliest departure is at 12:40 AM at night, and the last departure from Heathrow is at 8:45 PM which arrives into Welwyn at 11:44 PM. All services require a transfer, and take on average 3h 22m. The schedules shown below are for the next available departures.

3h 20m • 1 change

3h 9m • 1 change

2h 50m • 1 change

2h 50m • 1 change

7h 2m • 1 change

3h 8m • 1 change

3h 15m • 1 change

3h 14m • 1 change

7h 2m • 1 change

3h 8m • 1 change

3h 15m • 1 change

3h 14m • 1 change
Want to know about travelling from Heathrow to Welwyn? 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 Heathrow to Welwyn. However, there are services departing from Heathrow station and arriving at Welwyn station via St Peter's Street. The journey, including transfers, takes approximately 3h 22m.
Heathrow to Welwyn bus services, operated by Arriva UK, depart from Heathrow Central Bus Station.
Heathrow to Welwyn bus services, operated by Arriva UK, arrive at St Mary's Church station.
The distance between Heathrow and Welwyn is 43.4 km. The road distance is 70 km.
You can take a bus from Heathrow Central Bus Station to St Mary's Church via St Peter's Street in around 3h 18m.