If you are worried about flying your baby on United Airlines, don’t worry Children under 2 years old can travel as infants with their parents. Moreover, the United Airlines Infant Policy permits travel on domestic and international flights. However, domestic flights are free, and international flights charge 10% of the adult fare. So you can travel hassle-free with United Airlines. For more details, you can visit the Airlinesunaccompaniedminor website.