United: Unaccompanied minors must fly nonstop
United is no longer allowing children ages 5-11 to fly without an adult on flights that include connections.
The airline also says service for unaccompanied minors ages 12-17 will be offered only on nonstop flights.
United also charges a fee of $150 dollars each way for children flying alone.
U.S. Airways and Southwest have similar policies.