Does Frontier Airlines Allow Unaccompanied Minors? Yes, minors are allowed to fly alone on Frontier Airlines. Children from 5 to 14 can travel alone with the Unaccompanied Minor Service. Frontier ensures their safety by sending designated staff members to accompany them the entire way. There are additional expenses and limitations. Visit now https://www.globalflightcheck.com/does-frontier-airlines-allow-unaccompanied-minors/