Certainly! According to Spirit Airlines, children between the ages of 5 and 14 can travel alone on direct domestic flights, including Puerto Rico and the U.S. Virgin Islands, as unaccompanied minors. The itinerary must include only direct or through flights with no change of aircraft required. However, international locations are not included in unaccompanied minor travel. Spirit Airlines Unaccompanied Minor requires children travelling without an accompanying passenger aged 15 or older to travel as unaccompanied minors.