Originally Posted by
OnTheAsile
Clearing the bags as personal effects at SFO Customs would not be a problem.
I just do not understand the price difference. Maybe UAL is being paid something by the LAS casinos, or they see an opportunity to gouge the SFO market
Many, many threads on this topic. Here's a link to a long one in
UA forum.
Long story short: It's a hub penalty, or as airline execs call it, hub premium

I lived with it in Houston, now Dallas
Some folks have been known to fly WN or some other cheap airline (it's a good idea not to do it on the same airline), and lose the last leg, and still save a lot of money.
There is a previous thread right here in Budget Forum, but can't seem to find it.
Since you have to claim your luggage before clearing customs, you should be OK.
EmailKid