How old do you have to be to travel from England to California without a parent?

Me and my best friend are thinking of going to California next year, on our own. We will be meeting one of my relatives there. We will be 16 next year. We are from England. Please help as it's urgent. How old do you have to be to travel from England to California without a parent?How old do you have to be to travel from England to California without a parent?According to British Airways, once you're 16 you're classed as an adult on a plane. This is usually the case, as unaccompanied minors age restrictions are between the ages of 12 and 15. So you and you're friend would be able to fly from England to California with no problems.