Several airlines offer unaccompanied minor services for children flying alone. This is Best Airlines For Kids Fly Alone American Airlines, Delta, United, and Southwest. Age restrictions and fees vary. Parents should check specific airline policies, book in advance, and prepare their child for solo travel. For more further information visit the Airlines official website and call their helpline number.
Source: https://www.airlinesunaccompaniedminor.com/blog/best-airlines-for-kids-fly-alone