The average train between Watford and Heathrow Terminal 3 takes 1h 21m and the fastest train takes 1h 6m. The train runs at least 3 times per hour from Watford to Heathrow Terminal 3. 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 Watford and Heathrow Terminal 3. The earliest departure is at 7:03 AM in the morning, and the last departure from Watford is at 9:48 PM which arrives into Heathrow Terminal 3 at 11:09 PM. All services require a transfer at Queens Park (London) and take an average of 1h 21m. The schedules shown below are for the next available departures.


1h 7m • 2 changes


1h 6m • 2 changes


1h 7m • 2 changes


1h 6m • 2 changes
Want to know about travelling from Watford to Heathrow Terminal 3? 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 Watford to Heathrow Terminal 3. However, there are services departing from Watford station and arriving at Heathrow Terminal 3 station via Queens Park (London). The journey, including transfers, takes approximately 1h 21m.
Watford to Heathrow Terminal 3 train services, operated by London Overground, depart from Watford High Street station.
Watford to Heathrow Terminal 3 train services, operated by London Overground, arrive at Heathrow Terminals 2 & 3 station.
Book your Watford to Heathrow Terminal 3 train tickets online with London Overground, London Underground (Tube) and Heathrow Express.
The distance between Watford and Heathrow Terminal 3 is 20.7 km. The road distance is 48 km.
You can take a train from Watford High Street to Heathrow Terminals 2 & 3 via Queens Park (London), Queen's Park station, Paddington station, and London Paddington in around 1h 4m.