The average train between Heathrow and Sion takes 10h 55m and the fastest train takes 8h 53m. The train service runs several times per day from Heathrow to Sion. 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 4 times a day between Heathrow and Sion. The earliest departure is at 6:57 AM in the morning, and the last departure from Heathrow is at 7:00 PM which arrives into Sion at 12:56 PM. All services require a transfer at King's Cross St. Pancras station and take an average of 10h 55m. The schedules shown below are for the next available departures.




9h 55m • 4 changes




10h 24m • 4 changes




10h 25m • 4 changes




10h 53m • 4 changes




9h 55m • 4 changes




10h 24m • 4 changes




10h 25m • 4 changes




10h 53m • 4 changes




9h 55m • 4 changes




10h 25m • 4 changes




10h 53m • 4 changes
Arrives next day




17h 59m • 4 changes




9h 55m • 4 changes




10h 25m • 4 changes




10h 52m • 4 changes
Arrives next day




17h 59m • 4 changes
Want to know about travelling from Heathrow to Sion? 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 Sion. However, there are services departing from Heathrow station and arriving at Sion station via Paris Nord. The journey, including transfers, takes approximately 10h 55m.
Heathrow to Sion train services, operated by London Underground (Tube), depart from London St Pancras Intl station.
Heathrow to Sion train services, operated by London Underground (Tube), arrive at Sion station.
Book your Heathrow to Sion train tickets online with London Underground (Tube), Eurostar and 3 other operators.
The distance between Heathrow and Sion is 815.2 km. The road distance is 1,053 km.
You can take a subway from Heathrow Terminals 2 & 3 station to Sion via King's Cross St. Pancras station, London St Pancras Intl, Paris Nord, Paris Gare De Lyon, and Lausanne in around 10h 2m.