Do airlines check lap infant age?

Technically, most airlines require you to show proof of age for your lap infant. This can include a birth certificate, passport or sometimes hospital or immunization records. In reality, most airlines will not ask you for that information unless your baby looks like a toddler who could be past that second birthday.



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We may ask for age verification at any point within your journey, so you should travel with the documentation. If asked to provide proof of age and unable to do so, Customers will be required to purchase a ticket for the child.

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If you are flying domestically and your baby will be flying as a lap child, you may be asked for proof at check-in that they are indeed younger than 2 years old. If your child is flying domestically on their own ticket (not as a lap child) they probably won't need any sort of ID until they are 18 years old.

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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.

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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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To prove your child's age to an airline, one of the following documents will suffice: Child's passport (how to get a U.S. passport for an infant and things to know about children's passports) Child's birth certificate. Child's immunization form or other medical records may also work domestically.

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Parents/guardians should remove infants and children from strollers and car seats and carry them in their arms through the walk-through metal detector. Infants may be carried in a sling/carrier through the walk-through metal detector. Children will not be separated from their parent/guardian.

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Do children need to apply for TSA PreCheck®? It depends on their age and whether they are traveling with a parent or guardian who has enrolled in TSA PreCheck: Children 12 and under may accompany an enrolled parent or guardian in the TSA PreCheck lanes without restriction.

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The infant must either travel in a safety seat approved by the Federal Aviation Administration (FAA) or be able to sit upright in their seat without assistance and have their seatbelt securely fastened during taxi, takeoff, landing and whenever the 'fasten seatbelt' sign is on.

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Diaper bags, soft-sided cooler bags with breast milk, child safety seats, strollers and medical or mobility devices don't count toward your personal item or carry-on.

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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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An infant is considered fit to fly if:
  • You can produce a passenger medical form, also known as a medical release for travel, signed by a physician stating that the baby is healthy enough to fly.
  • You have a copy of the baby's birth certificate as proof of age.


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Related: Why you should travel while your baby is an infant If you have a trip that spans your child's second birthday, only the outbound flight will be free. On the return flight, you will be required to purchase your now-2-year-old a seat with a one-way ticket.

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If you're traveling with a 2-year-old, they do need their own seat on the plane. Once you're on board, you can certainly hold your toddler on your lap if needed.

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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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