LAX - Mammoth Lakes
I just flew the round trip from LA (Horizon Air) and man, was that awesome.
Free beer too! (Bear Republic Tribute Brown Ale).
LAX to Mammoth does not save a lot of time (I can drive it in ~4 hours). With check in, security and parking, you are looking at ~ 3 hours (actual flight 1.5ish).
Mammoth to LAX is a no brainer. Get to MMH and you are in LAX in less than two hours (including check-in security, etc).
Lowers the bar quite a bit on that ski weekender.