Would you let your 16 year old daughter fly by herself and visit her old friends and family back in California?

Yes I would and have let my kids both go, One flew out to Bermuda for vacation at 15 for march break, and my daughter flew out to Norway to visit friends at 16... She seems like a very responsible and mature young lady, IF you trust her and she will be staying with Family and close family friends by all means let her go... She will have a great time....