YOU WILL NEED TO PURCHASE A TICKET FOR YOUR CHILD IF YOU:Have a child that turns 2 during the trip. Prefer the child sit in a seat with an FAA-approved child safety seat. Already have a child that will be sitting in your lap, regardless of age.
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Children 2 or older are required to have their own seat, a ticketed adult fare. Children under 5 can't travel alone under any circumstances.
For domestic flights, children under 18 typically do not need personal identification. The ID of the accompanying responsible adult will suffice. (Note: The new rules on REAL ID-complaint cards that go into effect in May 2025 only apply to travelers age 18 and older.)
How much does a child ticket cost? The price of a child ticket will differ from airline to airline. Some airlines offer discounted prices for children, whereas others have a flat fare for adults and children. On average, discounted airline tickets for children are around 25—33% cheaper than adult tickets.
A baby under two years of age can fly for free in the U.S. and Canada when they sit on the lap of a parent. If your child is 2 years and older, you are required to buy a seat for them. If your child turns two during a trip, they can fly on your lap on the way there, but must return home in a paid seat.
Typically, children above the age of 2 require their own seat and will need a flight ticket. While some airlines may allow children under 2 to travel for free on domestic flights when sitting on an adult's lap, it's recommended to purchase a separate seat for their comfort and safety.
Although children who have not reached their second birthday are permitted to travel as lap children, the FAA strongly discourages this practice and recommends that you secure your child in an approved CRS in their own seat for the entire flight.
Ticket fares for babies and childrenOn domestic flights, infants under the age of two often fly for free if seated on their parent's lap, and some airlines charge a (discounted) fare. On international flights, airlines often charge 10% of the adult ticket price.
Can I take milk on a plane for my toddler? Travel with toddlers on planes, means you still need to think about food and drink for them. And yes, you can still bring milk or water on board for your toddler. It's usually advised to bring water in a sippy cup rather than a normal water bottle.
Additional infants under 2 years old must be ticketed and occupy an infant safety seat or in a separate aircraft seat. The infant must be under 2 years of age for the duration of the trip. If they turn 2 during a trip, they will need their own seat for the remainder of the trip.