Originally Posted by
ChrisFlyer66
If it saves a lot of money to book the ticket out of LAX or SFO, I would just book the positioning flight to arrive five or more hours before the separately-ticketed flight leaves LAX/SFO. Then you have time to find another way there if your positioning flight is severely delayed or canceled.
Or just do a one-way car rental from Las Vegas (maybe an off-airport location) to LAX, if it's reasonably priced.