What to do? UCLA and USC

Hey all, I was fortunate enough to receive an interview from UCLA earlier this month and scheduled for an interview next week. Then, I got a USC interview invite today for some mid-late Nov dates... Is it worth it for me to fly to CA for USC again? I live on the east coast. In USC's email, they said I may defer the interview once. I am assuming they are saying I can wait for later dates? Any advice would be appreciated!
Source: Student Doctor Network - Category: Universities & Medical Training Authors: Source Type: forums