London to Paris via the Channel Tunnel (Eurostar)

The Eurostar high-speed train connects London St Pancras International to Paris Gare du Nord through the Channel Tunnel in 2 hours 15 minutes to 2 hours 30 minutes. This includes check-in (recommended 60–90 minutes before departure), security, and the ~35-minute undersea tunnel transit. Trains reach 300 km/h (186 mph) on high-speed lines. Multiple daily departures; book early for best fares.