Train from London St Pancras International to Southampton Central
🇬🇧 London St Pancras International → 🇬🇧 Southampton Central
Straight-line Distance
113 km
SW (232.8°)
Rail Distance
~147 km
Estimated by rail
Travel Time
~1h 5m
Express
CO2 Saved vs Flight
82.6%
23.7 kg less CO2
Environmental Comparison
Train
Express
CO2 Emissions
5.0 kg
Flight
Economy class
CO2 Emissions
28.7 kg
Taking the train saves 23.7 kg CO2 (82.6% less emissions)
Route Information
High-Speed
Requires Transfer
Stations on This Route
Continue Your Journey
Continue from Southampton Central
Also from London St Pancras International
Frequently Asked Questions
The estimated train journey from London St Pancras International to Southampton Central takes approximately 1h 5m. This estimate is based on a rail distance of ~147 km using a express service.
The estimated rail distance from London St Pancras International to Southampton Central is approximately 147 km (113 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 Southampton Central emits approximately 5.0 kg of CO2, compared to 28.7 kg by flight. Taking the train saves 23.7 kg of CO2 — a 82.6% reduction in emissions.
The route from London St Pancras International to Southampton Central 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 Southampton Central.
Train vs Flight comparison
Compare door-to-door time, CO2 and cost for London St Pancras International to Southampton Central
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Data last updated: 2026-02-27