The average bus between Heathrow and Welwyn takes 3h 37m and the fastest bus takes 3h 23m. There is at least one bus per day 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 once daily between Heathrow and Welwyn. The earliest departure is at 5:30 AM in the morning, and the last departure from Heathrow is at 7:15 PM which arrives into Welwyn at 10:43 PM. All services require a transfer, and take on average 3h 37m. The schedules shown below are for the next available departures.

4h 15m • 1 change
3h 35m • 1 change
3h 35m • 1 change
3h 35m • 1 changeWant 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 Central Bus Station and arriving at St Mary's Church station via St Peter's Street station. The journey, including transfers, takes approximately 3h 37m.
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 59 km.
You can take a bus from Heathrow Central Bus Station to St Mary's Church via St Peter's Street in around 3h 33m.