The legal age to travel without consent would be 18 in the United States.
The legal age to travel without the consent of a parent or guardian will depend entirely on where you live, or possibly even where you were born.
Legal age restrictions where parental consent is required to allow you to perform various actions vary between places and circumstances. You might be old enough to marry but not to buy alcohol; you might be old enough to obtain a licence to drive one kind of motor vehicle but not another; you might be old enough to travel within your state, country or territory but not outside it, and so on.
To effectively answer your question it is necessary to know where you live (to establish jurisdiction and relevant legislation), where you were born (if applicable), your family circumstances (custody arrangements, guardianship and so on) and possibly even your reasons for wishing to travel without the knowledge, or consent, of those legally responsible for you.
Without consent its 18.
You have to be 18 to marry without parental consent.
The legal age is 16 but you need your parents consent if you are under 18.
18
The is 18, when you are a legal adult.
Legal age is 14 without a parent in england.
18 without parental consent.
Without parental consent it is 18.
21
18 years
When you are 18.
When you are 18.