The journey from Greenwich to Norwalk is a 15-mile trip. The most efficient way to travel is via the Metro-North Railroad, which takes approximately 15 minutes. Alternatively, you can drive via I-95, which takes about 20-25 minutes depending on traffic. This is a very common local commute.
Total Distance: 25 km driving distance; 20 km straight-line air distance.
The train is much faster than driving during peak hours.
Anytime, as it is a short trip.