Road Trip to Vegas via Death Valley, example guide
While Vegas the sin city doesn't need reason a trip to Death valley does make the visit exiting.
1-It is  advisible to leave early morning when travelling from LA Suggested route is  Hwy 14; it gets you out of the metro area earliest.
2-Furnace Creek Ranch is about 260 miles .its one of the key places to stop on road.
3-Visit Devil’s Golf Course, Badwater, it is a good detour.
4-A stop at Zabriskie Point when you get back on 190, and the mesmerizing ride up to 
    Dante’s View,
5-The direct way from Furnace Creek to Las Vegas is 190 to Death Valley Junction, take turn 
    to east on Stateline Road for Pahrump.