My round is in patches. Very little is less than half a mile away but about 30% is within 2 miles. Another 30% is within 5 miles and the rest is centred on a village about 10 miles away. My furthest domestic account lies 2 miles from the village on the side furthest from me and is 12 miles from home - but I always do it with the other village stuff.
If I was offered a regular days work at "good rates" I would travel up to 35 miles to do it as long as I could start early. So all you cleaners needing holiday cover in Newport, Monmouth, Cheltenham, Chippenham, Frome, Bridgwater and Burnham on Sea and Flat Holm Island (google it!) may apply for my services!
For myself I am aiming to fill in gaps in my area rather than actively seeking elsewhere.