Train from London St Pancras International to Sierre/Siders
🇬🇧 London St Pancras International → 🇨🇭 Sierre/Siders
Straight-line Distance
807 km
SE (133.2°)
Rail Distance
~1,049 km
Estimated by rail
Travel Time
~3h 55m
High_Speed
CO2 Saved vs Flight
91.3%
187.1 kg less CO2
Environmental Comparison
Train
High_Speed
CO2 Emissions
17.8 kg
Flight
Economy class
CO2 Emissions
205.0 kg
Taking the train saves 187.1 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 Sierre/Siders
Also from London St Pancras International
Frequently Asked Questions
The estimated train journey from London St Pancras International to Sierre/Siders takes approximately 3h 55m. This estimate is based on a rail distance of ~1049 km using a high_speed service.
The estimated rail distance from London St Pancras International to Sierre/Siders is approximately 1049 km (807 km straight-line). Rail routes are longer than straight-line distances because tracks follow terrain and connect intermediate cities.
Travelling by train from London St Pancras International to Sierre/Siders emits approximately 17.8 kg of CO2, compared to 205.0 kg by flight. Taking the train saves 187.1 kg of CO2 — a 91.3% reduction in emissions.
The route from London St Pancras International to Sierre/Siders 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 London St Pancras International and Sierre/Siders.
Train vs Flight comparison
Compare door-to-door time, CO2 and cost for London St Pancras International to Sierre/Siders
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Data last updated: 2026-02-27