Don't know how far, but it takes 20-25 minutes. Probably slightly over a mile.
Was very proud of DD when she informed her godmother that her school was "very close to my house". She was 4 at the time. Godmother was stunned - her 10 year old used to complain about walking half the distance.
Walking to school is fab - by the time she gets there we have had a good chat, had some exercise, got rid of any early morning stroppiness (both of us) and she is ready to sit down and listen to the teacher.