Windsor Castle is roughly 25 miles (about 40 km) west of central London, so it’s an easy day trip.

Quick distance and time

  • Distance: About 25 miles / 40 km between London and Windsor Castle.
  • By car: Around 45 minutes to 1 hour in light to moderate traffic.
  • By train: Fastest options can take about 35–40 minutes from London Paddington (with a change at Slough), or around 55–60 minutes direct from London Waterloo.

So if you’re in London, think of Windsor Castle as “just under an hour away” in most realistic scenarios.