The average train between Swansea and Harrow takes 3h 30m and the fastest train takes 3h 20m. There is a train service every few hours from Swansea to Harrow. 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 hourly between Swansea and Harrow. The earliest departure is at 3:46 AM at night, and the last departure from Swansea is at 8:23 PM which arrives into Harrow at 11:49 PM. All services require a transfer at London Paddington and take an average of 3h 30m. The schedules shown below are for the next available departures.

3h 54m • 1 change

3h 27m • 1 change

3h 30m • 1 change

3h 29m • 1 change

3h 42m • 1 change

3h 32m • 1 change

3h 29m • 1 change

3h 31m • 1 change

4h 14m • 1 change

3h 31m • 1 change

3h 20m • 1 change

3h 41m • 1 change
Want to know about travelling from Swansea to Harrow? 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 Swansea to Harrow. However, there are services departing from Swansea station and arriving at Harrow station via London Paddington. The journey, including transfers, takes approximately 3h 30m.
Swansea to Harrow train services, operated by Great Western Railway (GWR), depart from Swansea station.
Swansea to Harrow train services, operated by Great Western Railway (GWR), arrive at London Paddington station.
Book your Swansea to Harrow train tickets online with Great Western Railway (GWR) and London Underground (Tube).
The distance between Swansea and Harrow is 249.1 km. The road distance is 319 km.
Great Western Railway (GWR) operates a train from Swansea to London Paddington hourly. Tickets cost £85–170 and the journey takes 2h 54m.