It all depends on the starting and ending points but a little over a thousand miles. If you want to know for sure just use mapquest. It will give you a good estimate of how far they are apart.
20 miles
about 1,300 miles
813.7 miles
About 2500 miles
10 miles
72 miles
264 miles
3789 miles
15 miles
278 miles
8 miles
25 miles