Are you wondering whether minors can travel on delta flights alone? Delta allows children under the age of 18 years to travel alone but only children more than 5 years of age can travel without any adult companion. Minor who is in a different cabin than their parents or guardian is also considered a Delta Airlines Unaccompanied Minor according to their policy and is required to be in the Delta unaccompanied minor program. This service costs extra fees as the airlines provide additional services and benefits to the children. Also, certain documents are required to get your children into this program.