Train from Heathrow Terminals 1-2-3 Rail to Sion
🇬🇧 Heathrow Terminals 1-2-3 Rail → 🇨🇭 Sion
Straight-line Distance
816 km
SE (132.6°)
Rail Distance
~1,061 km
Estimated by rail
Travel Time
~3h 57m
High_Speed
CO2 Saved vs Flight
91.3%
189.3 kg less CO2
Environmental Comparison
Train
High_Speed
CO2 Emissions
18.0 kg
Flight
Economy class
CO2 Emissions
207.3 kg
Taking the train saves 189.3 kg CO2 (91.3% less emissions)
Route Information
Requires Transfer
Time zone difference: 1.0 hour(s)
Stations on This Route
Continue Your Journey
Continue from Sion
Also from Heathrow Terminals 1-2-3 Rail
Frequently Asked Questions
The estimated train journey from Heathrow Terminals 1-2-3 Rail to Sion takes approximately 3h 57m. This estimate is based on a rail distance of ~1061 km using a high_speed service.
The estimated rail distance from Heathrow Terminals 1-2-3 Rail to Sion is approximately 1061 km (816 km straight-line). Rail routes are longer than straight-line distances because tracks follow terrain and connect intermediate cities.
Travelling by train from Heathrow Terminals 1-2-3 Rail to Sion emits approximately 18.0 kg of CO2, compared to 207.3 kg by flight. Taking the train saves 189.3 kg of CO2 — a 91.3% reduction in emissions.
The route from Heathrow Terminals 1-2-3 Rail to Sion typically requires at least one transfer. Check operator timetables for the most direct connection available.
Check regional and national rail operator websites for services between Heathrow Terminals 1-2-3 Rail and Sion.
Train vs Flight comparison
Compare door-to-door time, CO2 and cost for Heathrow Terminals 1-2-3 Rail to Sion
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Data last updated: 2026-02-27