Traveling with children? If it's about boarding a plane, it can be challenging. Airlines have different terms and conditions for infants and children. United Airlines Infant Policy allows passengers to travel with their kids securely. However, whether you have to buy a ticket or they can sit on your lap, it all depends on the child’s age. If the child is under 2 years old (but older than 7 days), he or she can sit on their parent's lap. The ticketing cost for an infant will depend on the destination.

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