http://www.mapquest.com/routeplanner
if you google it it will direct you to uk site – but to get the routeplanner use link above ..
heres a short video on how it works
https://www.youtube.com/watch?v=X-PqTVMsu9Q
this stuff normally cost money
lets you import from excel , copy paste from word etc or manually enter postcodes .
will then optimize for shortest or fastest route , will work out fuel costs etc .
once you are happy with route – you can then email , share on face book, send to mobile or upload to garmin satnav ..
ally