The average train between Heathrow and Didcot takes 1h 11m and the fastest train takes 57 min. The train runs at least 2 times per hour from Heathrow to Didcot. 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 30 minutes between Heathrow and Didcot. The earliest departure is at 12:04 AM at night, and the last departure from Heathrow is at 11:04 PM which arrives into Didcot at 12:28 AM. All services require a transfer, and take on average 1h 11m. The schedules shown below are for the next available departures.

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1h 9m • 1 changeWant to know about travelling from Heathrow to Didcot? 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 Heathrow to Didcot. However, there are services departing from Heathrow Terminals 2 & 3 station and arriving at Didcot Parkway station via London Paddington station. The journey, including transfers, takes approximately 1h 11m.
Heathrow to Didcot train services, operated by Heathrow Express, depart from Heathrow Terminals 2 & 3 station.
Heathrow to Didcot train services, operated by Great Western Railway (GWR), arrive at Didcot Parkway station.
Book your Heathrow to Didcot train tickets online with Omio.
The distance between Heathrow and Didcot is 56.8 km. The road distance is 66 km.
You can take a train from Heathrow Terminals 2 & 3 to Didcot Parkway via London Paddington in around 1h 3m.