What age can a child sit in an airplane seat?

You can choose to keep your baby or toddler in your lap if she's under 2. But children 2 and older have to sit in their own seats. In that case, both the FAA and AAP strongly recommend using a car seat or approved harness (booster seats aren't allowed).



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Most U.S. airlines will permit children who have reached their fifth birthday to travel unaccompanied. Kids ages 5 through 11 who are flying alone must usually travel pursuant to special “unaccompanied minor” procedures. On some airlines, these procedures are required for unaccompanied children as old as 14.

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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.

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Once your child is 2 years old, you'll need to purchase a seat for them. The FAA recommends that children under 40 pounds continue to use a car seat and that children over 40 pounds use the seat belt on the airplane seat.

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Children under 18 don't need an ID to fly domestically but do need a passport for international flights. You can also bring breast milk or formula through security, even if your child isn't with you. But, be sure you meet TSA guidelines.

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Child safety seats are not required by the Federal Aviation Administration (FAA). However, both the FAA and the American Academy of Pediatrics (AAP) strongly encourage the use of a car seat or other child restraint system when flying with babies or young children.

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Planning your trip
  • Infants on lap. Children under two can sit on a parent's lap during flights to any destination.
  • Infant seats. Alternatively, infants can have their own seat if you bring an approved car seat.
  • All other kids. Children older than two will need a ticket and their own seat on the plane.


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If the conditions are satisfied, airlines that assign seats and guarantee fee-free family seating will provide adjacent seat assignments to the adult traveling with a child age 13 or under no later than on the day before the flight.

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Q: What is the Southwest Family boarding age limit? A: In order to take advantage of Southwest family boarding, you'll need to be traveling with a child who is 6 years old or younger.

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Need to know about the Southwest lap child policy? For domestic flights, kids under the age of 2 can fly for free when sitting on an adult's lap. They don't need a ticket, but you'll need to bring proof of age, such as a birth certificate, when you check in.

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Employees may ask for age verification at any point, so please travel with a copy or original form of any government-issued ID, such as a birth certificate or passport for your child. A medical release for travel is required for any infant under 14 days old.

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Typically, minors under the age of 18 do not have to present identification for domestic U.S. travel. Airlines will accept identification from the responsible adult on behalf of the minor(s). For international travel, minors under the age of 18 must present the same travel documents as the adult.

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Passport and Photo I.D. Children don't usually need a passport or photo I.D. for domestic flights; however, it's not a bad idea to have photo identification for your children when you travel together. All airlines require the same documentation for children as they would for an adult on international flights.

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If you're traveling with a child of any age, you can bring the following on your flight for free in addition to your carry-on and personal items: Diaper bag. Breast pump, milk or formula. FAA-approved car seat.

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If your child is traveling alone, with only one parent, or with a non-legal guardian, they will require a Child Travel Consent signed by both parents or legal guardians. A Child Travel Consent is sometimes called a letter of permission to travel.

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Strollers can be checked at the gate or with your regular checked baggage at the ticket counter. A stroller may be brought onboard without counting toward your carry-on limit. This is based on space availability; space guaranteed only with the purchase of a ticket for the infant).

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You use a pump to blow up a gadget that takes up the space between the toddler's seat and the seat in front. Some (like Plane Pal) just fill the floor space, while others (like the Flyaway Kids Bed) extend to cover the seat to make a more level sleeping surface.

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