Yes, a 14-year-old is permitted to fly alone on Alaska Airlines, and they fall into a specific transitional category regarding the "Unaccompanied Minor" (UM) service. For children aged 5 through 12, the UM service is mandatory, involving a $150 fee per way and strict supervision by airline staff. However, for those aged 13 through 17, the Unaccompanied Minor service is optional. This means a 14-year-old can choose to fly as a standard adult passenger without any extra fees or airline supervision, provided they are comfortable navigating the airport and handling potential delays on their own. If the parents feel the child needs extra help, they can still opt-in and pay the fee to have the teen escorted through the airport and met by a designated adult at the destination. It is important to note that if a 14-year-old travels as an adult, the parent or guardian is still required to stay at the airport until the flight has successfully taken off. Additionally, the teen should carry a "Consent to Travel" form and a copy of their birth certificate or a government-issued ID to ensure they have no issues with security or gate agents.