My family (well - me, my sister and my mum) are thinking of going around 800 Miles south to Paris sometime this year or the next. It is quite cheap to get down to Paris but not that cheap, during the summer your looking at £100 per person with easyjet, £130 per person with Air France and £120 per person with British Airways. It would be better going in the winter though, it is much cheaper since tourists lack in the winter.