Actually, I have been on a drive across the US. The distance driving nonstop would be approximately 10 or 11 or even 12 hours. I don't know how many miles, just hours.
From Salt Lake City, Utah to Los Angeles California, it is about 693 miles.
St. George to LA is 389 miles. Logan to LA is 769 miles. The answer you're looking for is probably somewhere in there.
Far
It is 689.64 miles according to MapQuest.
Los Angeles is IN California.
About 27.5 miles.
756 Miles
~835 miles.
21 miles
324 miles
9,754 miles
It is approximately 390 miles North of Los Angeles
3000
about 2200 miles
About 8,550 miles.